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1997
TRC9403
Reliability and Design Procedure
Revisions of ROADHOG
Kevin D. Hall, Robert P. Elliott, Quintin B. Watkins
Final Report
FINAL REPORT
TRC-9403 Reliability and Design Procedure Revisions of ROADHOG
by
Kevin D. Hall, Robert P. Elliott, and Quintin B. Watkins
conducted by
Department of Civil Engineering University of Arkansas
in cooperation with
Arkansas State Highway and Transportation Department
U.S. Department of Transportation Federal Highway Administration
and
Mack-Blackwell National Rural Transportation Study Center
University of Arkansas Fayetteville, Arkansas 72701
June 1997
ACKNOWLEDGMENTS / DISCLAIMER
This report is based on the findings of Project TRC-9403, Reliability and Design
Procedure Revisions of ROADHOG.
TRC-9403 is sponsored by, and this report is prepared in cooperation with, the
Arkansas State Highway and Transportation Department and the U.S. Department of
Transportation, Federal Highway Administration.
The contents of this report reflect the views of the authors who are responsible for the
facts and the accuracy of the data presented herein. The contents do not necessarily reflect
the official views or policies of the Arkansas State Highway and Transportation Department
or the Federal Highway Administration. This report does not constitute a standard,
specification, or regulation.
SI CONVERSION FACTORS
1 inch = 25.4 mm
1 foot = 0.305 m
1 lb/ft3 = 16 kg/m2
1 psi = 6.9 kN/m2
1 ksi = 6.9 MN/m2
1 lb = 4.45 N
EXECUTIVE SUMMARY
ROADHOG is a deflection-based flexible pavement overlay design procedure used
by the Arkansas Highway and Transportation Department (AHTD). ROADHOG was
developed using the AASHTO structural number concept for flexible pavement design and a
"structural deficiency" approach in determining overlay thickness, as originally outlined in
the 1986 AASHTO Guide for the Design of Pavement Structures. The 1993 Edition of the
AASHTO Guide expanded the concepts of the 1986 Guide to provide discreet overlay design
procedures. ROADHOG is re-evaluated in light of the revised AASHTO procedures.
To compare the two procedures, pavement surface deflections were generated using
ILLI-PAVE (a finite-element pavement model) and ELSYM5 (a linear elastic pavement
model), over a wide range of pavement thicknesses and layer moduli values for conventional
flexible pavements (asphalt concrete+granular base+subgrade). The results of the
comparison show that ROADHOG and AASHTO produce different overlay thicknesses due
to differences in the methods used to determine the effective structural number of the
existing pavement (SNeff) and the subgrade resilient modulus (MR). ROADHOG produced
SNeff values that were more consistent with SNeff values predicted using a component
analysis of the pavement. The two procedures produced similar overlay thicknesses for low
MR values. For relatively high MR values, AASHTO produced overlay thicknesses greater
than those predicted by ROADHOG. The analysis demonstrated the back-calculated
subgrade resilient modulus has a greater effect on overlay thickness for AASHTO than for
ROADHOG.
Based on the analyses presented, it is recommended that AHTD continue to use
ROADHOG for routine design of flexible pavement overlays. Refinements to ROADHOG,
including adjustments to predicted overlay thickness to account for extent and type of pre-
overlay repair, existing pavement condition, and non-destructive testing “time of year”, and a
determination of overlay design reliability, should be accomplished to ensure that
ROADHOG continues to evolve into a truly comprehensive overlay design system.
TABLE OF CONTENTS
PAGE ACKNOWLEDGMENTS / DISCLAIMER EXECUTIVE SUMMARY LIST OF FIGURES LIST OF TABLES CHAPTER 1. INTRODUCTION 1.1 Statement of the Problem 1-1
1.2 Project Objectives 1-2
1.3 Background Information 1-2
1.3.1 Overlay Design Methodology 1-3
1.3.2 Structural Deficiency Concept 1-3
2. OVERLAY DESIGN METHODS 2.1 Overview 2-1
2.2 AASHTO Procedure 2-1
2.2.1 Determination of Subgrade Resilient Modulus 2-2
2.2.2 Effective Structural Capacity Analysis 2-3
2.3 ROADHOG Procedure 2-4
2.3.1 Determination of Subgrade Resilient Modulus 2-4
2.3.2 Effective Structural Capacity Analysis 2-5
3. COMPARISON BETWEEN AASHTO AND ROADHOG PROCEDURES 3.1 Methodology 3-1
3.2 Generation of Surface Deflection Database 3-2
3.3 Generation of Overlay Thickness Database 3-2
TABLE OF CONTENTS (continued) CHAPTER PAGE 4. DATA ANALYSIS 4.1 Subgrade Resilient Modulus 4-1
4.2 Effective Structural Number of Existing Pavement 4-6
4.3 Overlay Thickness 4-10
5. CONCLUSIONS AND RECOMMENDATIONS 5-1 6. IMPLEMENTATION 6-1 REFERENCES APPENDIX A: ELSYM5 and ILLI-PAVE Model Load-Response Data APPENDIX B: ROADHOG and AASHTO Overlay Thickness Data
LIST OF TABLES
Table PAGE 1 Parameters Varied to Establish Deflection Database 3-4 2 Summary of Material Properties for ILLI-PAVE Solutions 3-5
LIST OF FIGURES Figure PAGE 1 Influence of Traffic Loadings on Pavement Serviceability 1-4 2 Typical Representation of the Resilient Modulus-Repeated Deviator Stress Relationship for Fine-Grained Soils 2-6 3 Effect of Load on Pavement and Underlying Layers 2-7 4 Delta-D / Effective Structural Number Relationship used in ROADHOG 2-8 5 Soil Configuration for the Three-Layered Conventional Flexible Pavement System 3-3 6 Comparison of Backcalculated MR with MR used in Pavement Model 4-2 7 Comparison of AASHTO "Design" MR with MR used in ILLI-PAVE Model 4-4 8 Comparison of SNf from Backcalculated MR with SNf from Input MR 4-5 9 Comparison of ROADHOG and AASHTO SNeff Component Analysis 4-7 10 Comparison of AASHTO SNeff at Various MR values with SNeff from Component Analysis 4-9 11 Comparison of AASHTO and ROADHOG Recommended Overlay Thickness 4-11
1-1
CHAPTER 1
INTRODUCTION
1.1 Statement of the Problem
The Arkansas Highway and Transportation Department (AHTD) designs new
pavements using the AASHTO Guide for the Design of Pavement Structures (1). The 1986
AASHTO Guide addresses the subject of overlay design for pavement rehabilitation, but it
does not contain a discreet overlay design procedure. The 1993 AASHTO Guide, however,
does contain discreet methods for determining flexible overlay design thickness. AHTD
currently uses ROADHOG (2), a flexible pavement overlay design procedure developed by
the University of Arkansas under research (TRC-8705) sponsored by AHTD, for designing
flexible pavement overlays. ROADHOG was developed in accordance with the basic
overlay design guidelines contained in the 1986 AASHTO Guide. A re-evaluation and
possible upgrade of the ROADHOG procedures is necessary since the publication of the
1993 AASHTO Guide to ensure ROADHOG remains consistent with AASHTO design
principles. TRC-9403, “Reliability and Design Procedure Revisions of ROADHOG” was
initiated to perform this re-evaluation.
In addition to a comparison of the procedures used in ROADHOG with procedures
described in the 1993 AASHTO Guide, TRC-9403 also proposed to address issues raised in
“additional research needs” from TRC-8705 (3). These “areas of further study” included:
• time of year adjustment. The identification and possible inclusion in ROADHOG of a factor to account for the variation in subgrade resilient modulus during the year.
• overlay performance review. A program of periodic monitoring of the field performance of overlays designed using ROADHOG; this performance
1-2
monitoring would provide data for “calibration” of the ROADHOG procedure.
• improved pavement model. Field loads on pavements are dynamic; models used in ROADHOG and other procedures are static-load models. Dynamic models are needed to move ROADHOG closer to correctly modeling field conditions.
• design reliability. The point-by-point design approach used by ROADHOG may invalidate some assumptions of the AASHTO reliability concept for design. A rational method of selecting design reliability is needed for ROADHOG.
• effect of pavement condition. The condition of the existing pavement prior to overlay and the type and amount of pre-overlay repair are critical to the performance of an overlay. Methods are needed to account for these factors during design.
1.2 Project Objectives
TRC-8705 raised some very profound issues to be addressed for ROADHOG to
become a truly comprehensive overlay design procedure. Indeed, many of the issues listed in
the previous section could serve as “stand alone” research projects. In order to accomplish
significant progress in the evolution of ROADHOG, the scope of work to be performed
under TRC-9403 was reduced from the myriad needs that had been identified. Two primary
objectives were identified for the project: (1) to re-evaluate the procedures used in
ROADHOG in light of the procedures included in the 1993 AASHTO Guide; (2) correct any
“bugs” identified by AHTD personnel in the ROADHOG computer program, and enhance
the computer program to include features desired by AHTD users.
1.3 Background Information
The underlying principle for determining the flexible pavement overlay thickness is
the serviceability-performance relationship, developed during the 1958-60 AASHO Road
Test (1). Incorporated in this relationship is the "structural deficiency" concept, which states
that a pavement can be considered "structurally deficient" when it cannot carry the volume of
traffic projected over the design period. ROADHOG and AASHTO both use the "structural
1-3
deficiency" approach to overlay design.
1.3.1 Overlay Design Methodology
The serviceability-performance relationship serves as the foundation for the
AASHTO overlay design procedure. Incorporated in the serviceability-performance
relationship is an interaction between pavement serviceability, traffic loadings, and structural
capacity as shown in Figure 1 (1). Looking at Figure 1, it can be seen that after construction,
a pavement has an initial structural capacity SCo and an initial serviceability Po. Traffic
loadings gradually deteriorate the original pavement to a selected terminal serviceability of
Pt1 after 'x' load repetitions of traffic. The existing pavement has an effective structural
capacity SCeff associated with the terminal serviceability Pt1.
In order to improve the structural capacity and the serviceability of the pavement
system, an overlay of structural capacity SCol , is applied to the existing pavement. The
structural capacity of the new pavement system is improved to SCf , with serviceability Pt2,
which is capable of carrying the future projected traffic. In order to determine the required
overlay structural capacity SCol the difference between the SCf of a new design for the
projected future traffic and the effective SCeff of the existing pavement is needed.
1.3.2 Structural Deficiency Concept
The 1993 AASHTO Guide and ROADHOG use a structural number (SN) to quantify
the structural capacity of the pavement layers (surface, base, subbase). SN is calculated
using a layer coefficient for the layer and the thickness of the layer, as shown in Equation 1.
1-4
Figure 1: Influence of Traffic Loadings on Pavement Serviceability
SN = a1D1 + a2D2 + . . . . . . .+ anDn (1)
where: SN= structural number of the pavement an = layer coefficient of layer n Dn = thickness of layer n
ROADHOG and the AASHTO procedure use the "structural deficiency" concept to
overlay design. The "structural deficiency" approach requires that the effective structural
capacity of the existing pavement (SNeff) be determined and the structural capacity required
to carry future traffic (SNf) also be determined. The overlay required is the difference
N Load Applications
Serv
icea
bilit
y
P0Pt2
Pt1x
ExistingPavement
OverlaidPavement
N Load ApplicationsSC =
Str
uctu
ral C
apac
ity
SC0
SCol
SCf
SCeff
1-5
between the structural capacity needed and that which currently exists, as expressed in
Equation 2.
SNol = SNf - SNeff (2)
where: SNol = required structural number of the overlay SNf = structural number required to carry future projected traffic SNeff = effective structural number of existing pavement
The required asphalt concrete (AC) overlay thickness is obtained by dividing the
structural number of the overlay (Equation 1) by an AC layer coefficient (aac) value as shown
in Equation 3.
Dol = SNol / aac (3)
where: Dol = thickness of overlay SNol = structural deficiency aac = asphalt layer coefficient
The difference between the design procedures fully utilizing the "structural
deficiency" approach can be related to the methods used to estimate the effective structural
number of the existing pavement (SNeff) and the methods used to determine the structural
number required to carry future traffic (SNf).
2-1
CHAPTER 2
OVERLAY DESIGN METHODS
2.1 Overview
In order to determine the "structural deficiency" of the pavement, methods for
determining SNf and SNeff are included in AASHTO and ROADHOG. Both the ROADHOG
and AASHTO procedures use the AASHTO "new" pavement design equation to determine
SNf, differing only in the method used to back-calculate the resilient modulus, MR, of the
roadbed soil. MR is the only variable input in the AASHTO "new" pavement design equation
which differs for the two procedures. The procedures determine SNeff using distinct
methods. A comparison of the two procedures will focus on the respective methods of
estimating SNeff and MR. An overview of the methods for each procedure follows.
2.2 AASHTO Procedure
The 1986 AASHTO Guide included a framework around which an overlay design
procedure could be developed, but did not contain a discrete procedure itself. The 1993
Guide, however, did contain discrete procedures for determining overlay thickness. The
1993 AASHTO Guide incorporates methods which use FWD data to determine the subgrade
resilient modulus and the effective structural capacity of the existing pavement. AASHTO
has other methods of determining SNeff and MR which rely on laboratory based testing and
are not addressed in this study. A description of the AASHTO methodologies used for
estimating MR and SNeff follows, with MR discussed first since it is used in the determination
of SNeff.
2-2
2.2.1 Determination of Subgrade Resilient Modulus
The method recommended by AASHTO for back-calculating the subgrade resilient
modulus is based on a method proposed by Ullidtz (4), which is based on Boussinesq's
deflection equation (5). The concept rests on two basic assumptions: (1) at some distance
from the center of loading, the measured surface deflection is almost entirely due to
deformation in the subgrade; (2) as radial distance from a load increases, the approximation
of a distributed load by a point load improves. These two assumptions allow a deflection to
be estimated by the Boussinesq equation for a one-layer system. Rearranging the Boussinesq
equation to solve for the elastic modulus and assuming a Poisson's ratio of 0.5 for the
subgrade soil, the equation used in the 1993 AASHTO Guide for estimating MR is obtained:
where: MR = resilient modulus of the subgrade soil, psi P = applied load, pounds dr = deflection at radial distance r from the load, in. r = radial distance from the load, in.
Equation 4 is recommended only for deflections measured at a radial distance greater
than 0.7 times the effective radius of the stress bulb at the subgrade/pavement interface (ae);
this is to insure that the deflection is due only to subgrade deformation (1). The back-
calculated subgrade modulus is multiplied by a "correction" factor to obtain the design
subgrade modulus used in the AASHTO "new" pavement design procedure to determine SNf.
A correction factor not greater than 0.33 is recommended to make the subgrade resilient
Rr
M 0.24 P
d r=
**
(4)
2-3
modulus consistent with the AASHO Road Test soil used in the development of the flexible
pavement design equation, which had a laboratory-measured value of 3,000 psi at a deviator
stress of 6 psi (6).
2.2.2 Effective Structural Capacity Analysis
The AASHTO approach to determining the effective structural number of an existing
pavement is based on the idea that the structural capacity of a pavement is a function of its
overall stiffness (1). The 1986 AASHTO Guide (Appendix NN) uses this premise in
developing an "equal stiffness" approach to determining SNeff (7). The 1993 AASHTO
Guide uses a "simplified" version of this general approach. In the 1993 Guide, SNeff is
related to the total pavement thickness (D) and the "effective" modulus of the total pavement
structure (EP) as shown in Equation 5:
where: SNeff = effective structural number of the pavement D = total pavement thickness (surface, base, subbase), in. Ep = effective modulus of the pavement, psi
The pavement's effective modulus (EP) may be determined using Equation 6.
Equation 6 is based on Boussinesq's one-layer deflection (5), with subsequent development
by Odemark's method for determination of deflection in a two-layer system (8) and the
"equivalent thickness" concept described by Barber (9).
e ff P3S N 0 .0 0 4 5 D E= * * (5)
2-4
d pa
MDa
EM
Da
ER
p
R
p0
3
2
2
151
1
11
1=
+⎛
⎝⎜⎜
⎞
⎠⎟⎟
+
−
+⎛⎝⎜
⎞⎠⎟
⎡
⎣
⎢⎢⎢⎢⎢⎢⎢⎢
⎤
⎦
⎥⎥⎥⎥⎥⎥⎥⎥
. (6)
where: d0 = deflection measured at the center of the load plate, in. p = NDT, load plate pressure, psi a = NDT, load plate radius, in. MR = resilient modulus of subgrade soil, psi D = total pavement thickness, in. EP = effective pavement modulus, psi
The stiffness of the pavement (EP) is a function of the stiffness of the subgrade (MR),
the loading characteristics (plate radius and pressure), the thickness of the pavement (D), and
the maximum surface deflection (d0). The maximum surface deflection is adjusted according
to a reference temperature of 20°C [68°F] (1). Using the temperature-corrected deflection
the effective pavement modulus can be found by iteration.
2.3 ROADHOG Procedure
ROADHOG uses FWD deflection data to determine the flexible pavement overlay
design thickness. In ROADHOG the determination of the effective structural number of the
existing pavement is independent of the subgrade resilient modulus. The backcalculated
subgrade resilient modulus is used only to determine the structural number of the pavement
required to carry future traffic.
2.3.1 Determination of the Subgrade Resilient Modulus
An estimate of the roadbed soil (subgrade) resilient modulus must be provided in
order to calculate the structural number required to carry future traffic (using AASHTO new
2-5
pavement design procedures). ROADHOG determines MR using the pavement surface
deflection measured at 36 in. from the center of the loading. MR is calculated using a
regression equation developed by Elliott and Thompson (10). The algorithm was developed
from data generated by the ILLI-PAVE finite element model (11). The regression equation
used for conventional flexible pavements with more than 3-inches AC surface is shown as
Equation 7:
E D DRi = − +250 525 0 2936 362. . * . * (7)
where: Eri = breakpoint resilient modulus of the subgrade soil, ksi D36 = pavement surface deflection at 36" from the load, mils
The breakpoint resilient modulus for fine-grained soils is defined as the point at
which the slope of the resilient modulus-repeated deviator stress curve breaks (Figure 2).
The 1986 Guide used a subgrade resilient modulus value of 3000 psi for the AASHO Road
Test soil in order to incorporate the effects of the subgrade into the AASHTO design
equation. This subgrade resilient modulus value was found to agree with the breakpoint
resilient modulus values obtained by Thompson and Robnett (12). Thus the value of MR
determined by the ROADHOG method is consistent with the value used in the AASHTO
Guide design equation to represent the AASHO Road Test subgrade soil. MR determined by
ROADHOG does not require the modification needed by the AASHTO backcalculation
method needs.
2.3.2 Effective Structural Capacity Analysis
Kong (13) developed the methodology used in ROADHOG for estimating the
effective structural number of a flexible pavement. In ROADHOG the determination of
2-6
SNeff
Figure 2: Typical Representation of the Resilient Modulus-Repeated Deviator Stress Relationship for Fine-Grained Soils
is assumed to be a function of pavement stiffness, just as in the AASHTO method. Kong
developed a SNeff algorithm with the concept that at a sufficient distance from the loading
plate the surface deflection is entirely due to the deformation of the subgrade.
The methodology uses two pavement surface deflections shown in Figure 3: (1) the
deflection at the center of the load, where it is assumed that the surface deflection is due to
the deformation of the pavement layers and the subgrade; (2) a deflection at distance (T)
from the load (in the case of ROADHOG, a distance equal to the pavement thickness), where
it is assumed that the surface deflection is due entirely to subgrade deformation. Kong
Max.
PlasticYield
1
K1
1
K2
ERi= “Breakpoint” Resilient Modulus
Repeated Deviator Stress, σd
Res
ilien
t Mod
ulus
, Er
2-7
suggested that the difference between these two deflections, termed "delta-D", could be used
as a measure of pavement stiffness. In this manner SNeff is determined by a method that is
independent of the subgrade resilient modulus (MR) and the depth to bedrock.
Figure 3. Effect of Load on Pavement and Underlying Layers
In the development of the SNeff algorithm, Kong related the SNeff of a number of
conventional flexible pavement configurations to the deflection difference delta-D. He
generated deflection basins using the ELSYM5 elastic layer model (14). Kong verified the
delta-D/SNeff relationship using the ILLI-PAVE finite element method. SNeff was estimated
using "component analysis", in which each paving layer was assigned a "typical" layer
coefficient based on its input elastic modulus, and the structural number calculated according
TAC Surface
Base
T
deflected surface
D0 Dt
“zone of pavement influence”
2-8
to Equation 1. Figure 4 shows the relationship between SNeff and delta-D for various
pavement thicknesses (13). The subgrade resilient modulus is not explicitly considered in
the relationship shown in Figure 4. The relationship is primarily a function of total
pavement thickness. A temperature correction factor is needed to adjust delta-D because the
AC modulus is temperature sensitive. Temperature adjustment curves were established with
the reference temperature being 70°F. Delta-D is divided by this adjustment factor before
determining SNeff.
Figure 4: Delta-D / Effective Structural Number Relationship used in ROADHOG
0 0.5 1 1.5 2 2.5 3delta-D (0.01-in)
0123456789
10
Eff
ectiv
e St
ruct
ural
Num
ber,
SN
eff
PavementThickness
(in)
2418128
3-1
CHAPTER 3
COMPARISON BETWEEN AASHTO AND ROADHOG
3.1 Methodology
In order to modify ROADHOG a comparison must be performed which relates
existing ROADHOG procedures to the recommended AASHTO procedures for flexible
pavement overlays. ROADHOG and the AASHTO Guide have many common approaches
in the development of each procedure. Both procedures use the "structural deficiency"
approach for determining the overlay thickness. Also, the effective structural number of the
existing pavement (SNeff) and the subgrade resilient modulus (MR), which are used in the
"structural deficiency" approach, are determined from non-destructive testing (NDT)
deflection data taken by a falling weight deflectometer (FWD). The AASHTO Guide has
other methods of determining SNeff and MR which aren't dependent on NDT data. The
comparison between the procedures will only focus on the methods using FWD data for
determining overlay thicknesses.
In order to compare the procedures, a database of deflection basins must be generated
for conventional flexible pavements (asphalt+base+subgrade) with the asphalt and base
course thicknesses and moduli values varying, along with varying subgrade moduli. The
deflection database is generated using ILLI-PAVE, a finite element structural model, and
ELSYM5, an elastic layer model.
In order to compare overlay design procedures four tasks are performed. (1) A
pavement surface deflection database is generated; (2) The surface deflection database
3-2
information is input into the AASHTO and ROADHOG procedures in order to obtain SNf,
SNeff, MR, and the overlay thickness; (3) The effect of MR and SNeff on the resulting overall
overlay thickness are analyzed; (4) The results of the comparison are determined.
3.2 Generation of Surface Deflection Database
Comparisons of the AASHTO and ROADHOG deflection-based overlay design
procedures are performed using "conventional flexible pavement" configurations (Figure 5).
The material properties and thicknesses varied to establish the deflection database are shown
in Table 1. Pavement surface deflection basins are generated using ILLI-PAVE and
ELSYM5. Finite element based procedures have the advantage of the ability to model both
non-linear and linear elastic pavement materials. ILLI-PAVE models the AC layer as a
"linear elastic" material, while it considers the granular base and subgrade soil to be "stress
dependent" materials which behave in a "non-linear" fashion. The granular base and
subgrade soil parameters are selected from work performed by Elliott and Thompson and are
shown in Table 2 (10). In the ELSYM5 model, all the materials (AC, base, subgrade) are
considered to be "linear elastic". The surface deflection database may be found in Appendix
A.
3.3 Generation of Overlay Thickness Database
Using the surface deflection basins, MR and SNeff are determined using the AASHTO
and ROADHOG procedures. SNf is determined using the AASHTO "new" pavement design
procedure for both procedures. The values input into the equation include a standard
deviation (0.42), delta PSI (2.5), and future traffic (107 ESALs), which are constant for all
analyses. The design reliability used to determine SNf is varied, including values of 50, 75,
3-3
90, 95, and 99 percent. The value of MR input into the equation is varied according to the
procedure used. Once SNf and SNeff are calculated, Equation 3 is used with an asphalt layer
coefficient of 0.44 to obtain the overlay thickness for design reliability of 50, 75, 90, 95, and
99 percent. The overlay thickness database is located in Appendix B.
Figure 5: Soil Configuration for the Three-Layered Conventional Flexible Pavement System
Asphalt Concrete
Subgrade Soil
Granular Base
3-4
Material
Layer Coefficient
Thickness (in)
Resilient Modulus
(ksi)
AC
Temperature (deg C)
Asphalt
Concrete
0.44 2 1400
5
4 500
20
6 100
40
8
Crushed
Stone (base #1)
0.14 8 40
10
12
Gravel
(base #2)
0.12 8 30
10
12
Subgrade Soil
12
7.5
3
1
Table 1: Parameters Varied to Establish Deflection Database
3-5
4-1
CHAPTER 4
DATA ANALYSIS
Factors considered in the comparison between the ROADHOG and AASHTO overlay
design procedures include the subgrade resilient modulus, the effective structural number of
the existing pavement, and the resulting overlay thickness.
4.1 Subgrade Resilient Modulus
A representative pavement section (4-in. AC layer, 8-in. granular base) is presented
to illustrate the comparison of MR backcalculation procedures; the results shown are
"typical" of the results obtained from other conventional flexible pavement configurations
(see Appendix B for data on additional pavements). Backcalculated MR values are estimated
from the deflection basins generated by both the ILLI-PAVE and ELSYM5 models. In the
calculation of MR for the ROADHOG procedure Equation 8 is used, while Equation 4 is used
for the AASHTO procedure. The subgrade resilient modulus backcalculated using the
AASHTO procedure and the ROADHOG procedure are plotted versus the "known" input
MR values, shown in Figure 6.
Trends in the data shown in Figure 6 are not surprising. Each backcalculation
method provides relatively accurate estimates of MR for deflection basins generated by the
model upon which the method is based. The AASHTO procedure accurately estimates MR
for ELSYM5 (elastic layer) based deflections; Equation 4 is developed using elastic layer
theory. The ROADHOG procedure accurately estimates MR for ILLI-PAVE based
deflections; Equation 8
4-2
Figure 6: Comparison of Backcalculated MR with MR used in Pavement Model
is a regression equation developed from ILLI-PAVE generated deflection data. The
AASHTO backcalculated MR values using the ILLI-PAVE deflections are consistently
higher than the ROADHOG values. The ROADHOG backcalculated MR values using the
ELSYM5 deflections are relatively lower than the "known" input MR values. It is shown that
neither procedure estimates MR accurately using deflections generated by the "non-basis"
model.
The points shown in Figure 6 raise the question of the accuracy with which each of
the pavement models represents "real-life" pavements. Many researchers have recommended
0 3 6 9 12 15 18 21Input MR (ksi)
0
3
6
9
12
15
18
21
AASHTO/Elsym5AASHTO/IllipaveROADHOG/Elsym5ROADHOG/Illipave
Bac
kcal
cula
ted
MR (k
si)
4-3
the use of stress-dependent models to represent unbound granular materials and subgrade
soils (15). ILLI-PAVE as used in this study, models the non-linear, stress dependent
behavior of paving materials and subgrade soils. ELSYM5 however, models the materials
using only linear elastic assumptions. In this study it is assumed that ILLI-PAVE provides a
more realistic picture of actual pavement behavior; only the data generated from ILLI-PAVE
is used for the comparisons that follow.
Using the ILLI-PAVE generated deflection basins, the AASHTO backcalculation
method overestimates the subgrade resilient modulus, compared to the method used in
ROADHOG. Since MR is used in the AASHTO effective structural number estimation
procedure, an error in MR may result in an error in SNeff, directly affecting the resulting
overlay thickness. In ROADHOG, MR is not explicitly considered in the calculation of SNeff.
Additional discussion of this point is provided in the comparison of SNeff values.
In the determination of SNf, the total structural number required to carry future
traffic, the subgrade resilient modulus is used. In both the AASHTO and ROADHOG
procedures, SNf is determined using AASHTO "new-pavement" design concepts. For new
pavement design, a "design" value of MR is needed. This design value should be obtained in
a manner consistent with the assumptions underlying the development of the AASHTO
flexible pavement design equation (1). The method of backcalculating MR used in the
ROADHOG method was developed to be consistent with the original AASHO Road Test soil
(2). However, MR values obtained using AASHTO procedure Equation 4 must be adjusted
to make the values consistent with the laboratory measured value used for the AASHO Road
Test soil (1,16). For conventional AC surfaced pavements, the 1993 AASHTO Guide
4-4
recommends the MR values obtained using Equation 4 be multiplied by a correction factor of
0.33 for use in design (1).
Figure 7 shows corrected "design" MR values (using a correction factor of 0.33) for
the AASHTO procedure and MR values for the ROADHOG procedure plotted versus the
input MR values for the ILLI-PAVE generated deflection basins. At lower-stiffness levels,
the design AASHTO MR values reasonably reflect input values; however, the AASHTO
method (using C=0.33) underestimates MR at higher input stiffness values.
Figure 7: Comparison of AASHTO "Design" MR with MR used in ILLI-PAVE Model
Input MR (ksi)0 3 6 9 12 15
0
3
6
9
12
15
AASHTO (design)ROADHOG
Bac
kcal
cula
ted
MR (k
si)
4-5
The AASHTO flexible pavement design equation is sensitive to MR, particularly for
low MR values (17). Underestimating the design subgrade resilient modulus has the general
effect of increasing SNf, while overestimating MR generally decreases SNf. This is
illustrated in Figure 8, which shows SNf values determined in the AASHTO and ROADHOG
procedures plotted against SNf values calculated using the "input" MR values for ILLI-
PAVE. The design reliability used in the AASHTO flexible pavement design equation is
95%; the trend shown is representative of the other design reliability values.
Figure 8: Comparison of SNf from Backcalculated MR with SNf from Input MR
4.2 Effective Structural Number of Existing Pavement
2 3 4 5 6 7 8 9 102
3
4
5
6
7
8
9
10
AASHTOROADHOG
(12)
(7.5)
(3)
(1)
(Input Mr in ksi)
New Pavement Design Parameters:Reliability = 95%Std. Deviation = 0.42delta PSI = 2.5Traffic = 10 million ESAL
SNf (using input MR)
SNf (
usin
g ba
ckca
lcul
ated
MR)
4-6
The comparison of SNeff algorithms is performed using a variety of conventional
flexible pavement configurations. In order to compare SNeff values obtained from the
AASHTO and ROADHOG procedures, some "standard" must be established to serve as a
basis for comparison. For this research, the standard of comparison is the SNeff value
determined using component analysis (Equation 1). For each generated deflection basin, all
paving layer thicknesses and modulus values are "known". Layer coefficients are assigned to
each material based on the material's modulus value and the relationships given in the 1993
AASHTO Guide; layer coefficients used in this research are shown in Table 1. Two items
regarding layer coefficients should be noted. The first is that a single layer coefficient is
used for the asphalt concrete surface. The second is that layer coefficients used to determine
the SN of the pavement section are selected with no consideration of material degradation --
in other words, no "reduced" layer coefficients are used. The variation in AC modulus
shown in Table 1 is related to temperature. Both the AASHTO and ROADHOG procedures
adjust deflection data to a single reference temperature (approximately 20°C [68°F]). The
AC layer coefficient used (0.44) is typical for asphalt concrete at the reference temperature.
Figure 9 shows deflection-based SNeff values (AASHTO and ROADHOG) plotted
versus component analysis based values for an input subgrade modulus equal to 7500 psi.
Because of the large number of data points, individual values are not plotted. Instead, SNeff
data are plotted as trends determined by linear regression. The degree of "fit" as determined
by the regression coefficient r2 is shown for each regression line. ROADHOG has an r2 of
0.89 with a standard error of 0.33 while AASHTO has an r2 of 0.90 with a standard error of
0.27. For pavement configurations with lower SNeff values both the AASHTO and
4-7
ROADHOG methods adequately reflect component based SNeff values. At higher levels of
SNeff the AASHTO method underestimates the pavement's effective structural number
relative to component based values. Underestimating SNeff has the general effect of
increasing overlay thickness.
Figure 9: Comparison of ROADHOG and AASHTO SNeff Component Analysis
One item to consider in the comparison shown in Figure 9 involves the role of the
0 1 2 3 4 5 6 7 8 9 10
SNeff (component analysis)
0
1
2
3
4
5
6
7
8
9
10
AASHTOROADHOG
AASHTO: r2 = 0.90 std. error = 0.27
ROADHOG: r2 = 0.89 std. error = 0.33
SNef
f (al
gori
thm
)
4-8
subgrade resilient modulus on SNeff values, particularly for AASHTO-based values. The
ROADHOG SNeff algorithm is relatively independent of MR. In the AASHTO procedure,
SNeff and MR are inter-dependent (see Equation 6). An error in the AASHTO-based SNeff
value may be compounded by an error in determining MR. To adequately compare SNeff
procedures it is necessary to distinguish the effect of MR on the SNeff estimate.
Figure 10 shows AASHTO-based SNeff trends for four "input" levels of subgrade
modulus. The SNeff trends clearly reflect the effect of MR, particularly for higher
component-analysis based values of SNeff. For any given component-analysis based SNeff
value (which denotes a single conventional flexible pavement configuration in this research)
the AASHTO procedure estimates a range of SNeff values, depending on the subgrade
modulus used. It is apparent that the AASHTO SNeff determination procedure provides an
estimate that reflects the structural capacity of the total pavement system (paving layers +
subgrade soil), not of the pavement alone. This violates the basic definition of the AASHTO
structural number in which SN is a function of the layer thickness and material properties
(see Equation 1)(7). For overlay design purposes, SNeff should reflect only the structural
capacity of the pavement layers. The effects of the subgrade will be reflected in the total SN
required for the overlaid pavement.
Another complication in the AASHTO system and its use of MR in determining SNeff
is the fact that (for ILLI-PAVE based deflections) the AASHTO procedure overestimates the
subgrade modulus (Figure 6). This may help provide an explanation for the fact that
AASHTO underestimates SNeff. For a given value of d0 (refer to Equation 6), extremely high
4-9
Figure 10: Comparison of AASHTO SNeff at Various MR values with SNeff from Component Analysis
values of MR (as seen in Figure 6) result in relatively low SNeff values. A possible
explanation for the relatively low AASHTO SNeff values is that the MR values used in
Equation 6 are much higher than the "actual" MR values used to model the subgrade. Using a
higher MR value, Equation 6 considers the deflection under the load to be due to a weak
pavement (low pavement modulus, EP ). SNeff is reduced when a lower EP value is input into
Equation 5. In other words the AASHTO procedure may give too much "credit" to the
subgrade soil and therefore "discounts" the structural capacity of the pavement structure,
0 1 2 3 4 5 6 7 8 9 10SNeff (component analysis)
0
1
2
3
4
5
6
7
8
9
10
Subgrade Mr12 ksi7.5 ksi3 ksi1 ksi
SNef
f (A
ASH
TO
Alg
orith
m)
4-10
resulting in lower SNeff values.
4.3 Overlay Thickness
The ultimate comparison between the two overlay design procedures is the
recommended overlay thickness for a given pavement configuration and its associated
deflection basin. Figure 11 shows a comparison of overlay thickness as determined by the
AASHTO and ROADHOG methods for various conventional flexible pavement
configurations. The AASHTO procedure generally recommends "thicker" overlays than
does the ROADHOG procedure for pavements over stiffer subgrade soils; for pavements
over soils with lower MR values, the two procedures recommend similar overlay thicknesses.
Overlay thickness is a direct function of SNol. The factors affecting SNol (and therefore
overlay thickness) are SNf and SNeff (Equation 2).
It was established earlier that corrected "design" MR values used in the AASHTO
method generally underestimate the subgrade resilient modulus compared to the
backcalculated modulus values used in ROADHOG. With all other "new-pavement" design
factors constant, the SNf values determined by AASHTO are higher than those determined
by ROADHOG (Figure 7). Higher SNf values will result in thicker overlays. It was also
established that the AASHTO procedure generally underestimates SNeff relative to the
ROADHOG procedure, particularly for those pavement configurations having higher
component-analysis based SNeff values (Figure 8). Lower SNeff values result in thicker
overlays. The observed differences in recommended overlay thicknesses between AASHTO
and ROADHOG can be traced, then, to both the SNf and SNeff estimates.
4-11
Figure 11: Comparison of AASHTO and ROADHOG Recommended Overlay Thickness
Since differences in the recommended overlay thickness exist, the question to be
answered becomes "which of the two overlay design procedures produces a more 'correct' or
'realistic' overlay thickness?". An "independent" basis of comparison is offered for each of
components leading to differences in overlay thickness: (1) the subgrade modulus value input
into the pavement models, used for comparing MR values backcalculated by each method;
(2) the "component-analysis" based structural number for each pavement configuration, used
for comparing SNeff values estimated by each method. In each case, the algorithms contained
in the ROADHOG procedure produce values that compare more favorably to the standards
used.
0 2 4 6 8 10 12 14 16
ROADHOG Overlay Thickness (in)
0
2
4
6
8
10
12
14
16
Subgrade Mr12 ksi7.5 ksi3 ksi1 ksi
AA
SHT
O O
verl
ay T
hick
ness
(in)
4-12
It becomes apparent through the analyses presented that the subgrade resilient
modulus plays a crucial role in determining the overlay thickness. It is important to use an
appropriate modulus value in the AASHTO flexible pavement design equation. Using the
lowest calculated subgrade resilient modulus produces the most conservative overlay
thickness. Using an overestimated subgrade modulus in design will result in an
underestimated AC overlay thickness. If stress-dependent, non-linear material models such
as those used in ILLI-PAVE produce more realistic pavement responses (e.g. surface
deflections) than do linear elastic models, the apparent difficulty shown by the AASHTO
procedure in estimating the subgrade modulus (particularly for "stiffer" subgrade soils) gives
rise to concern regarding recommended overlay thicknesses.
5-1
CHAPTER 5
CONCLUSIONS AND RECOMMENDATIONS
There are differences between the ROADHOG and AASHTO overlay thickness
design procedures. The differences between the procedures can be traced to the methods for
determining the effective structural number of the existing pavement and the structural
number required to carry future traffic. It is apparent that the backcalculated subgrade
resilient modulus plays an important role in determining the overlay thickness. Based on the
analyses detailed earlier the following conclusions are offered:
1. For conventional flexible pavements overlying relatively stiff subgrades, the
AASHTO overlay design procedure generally recommends thicker AC overlays than
does the ROADHOG procedure. For pavements over subgrade soils with lower
resilient modulus values, the two procedures recommend similar overlay thicknesses.
2. For pavement sections having higher component-analysis based effective structural
numbers, the AASHTO procedure underestimates SNeff compared to the ROADHOG
procedure.
3. For higher values of subgrade resilient modulus, the AASHTO procedure generally
overestimates SNf compared to the ROADHOG procedure.
4. The inter-dependence of SNeff and MR in the AASHTO procedure makes the
subgrade modulus the primary factor in determining the required overlay thickness.
5. In general, the AASHTO procedure overestimates the MR value used for determining
SNeff, causing an underestimation of the SNeff value. In the ROADHOG procedure
5-2
MR and SNeff are independent; no error in SNeff is associated with an error in MR.
The conclusions are based on four assumptions:
1. ILLI-PAVE model represents “real-world” conditions insofar as possible.
2. “Input” subgrade modulus is a valid standard of comparison for backcalculated
values.
3. Component analysis based SNeff is a valid standard of comparison for estimated
SNeff values.
4. In ILLI-PAVE all the subgrade soils were modeled using the same level of
stress dependency.
RECOMMENDATIONS
In general, it is recommended that the ROADHOG procedure continue to be used by
AHTD for determining flexible pavement overlay thicknesses. The analyses detailed in this
report demonstrate that the ROADHOG procedure produces overlay thicknesses that appear
to be more realistic that those produced using procedures found in the 1993 AASHTO Guide,
and yet remains compatible with fundamental AASHTO design concepts.
Although this study provides valuable results in terms of validating the efficacy of
ROADHOG relative to AASHTO procedures, significant issues concerning overlay design
originally identified in TRC-8705 have yet to be addressed. Among these are adjustments to
overlay thickness due to deflection testing “time of year” and the condition of / repairs to the
existing roadway; the question of overlay design reliability; and the use of an improved (e.g.
dynamic load) pavement model to better model a pavement system’s response to traffic
loads.
5-3
Some of these concerns can be addressed by the creation and execution of a
structured, formal overlay performance monitoring program. By tracking the performance of
overlays designed by ROADHOG and constructed over pavements in a variety of locations
and with a variety of “existing conditions”, vital data can be gathered to address issues such
as the effect of existing conditions and pre-overlay repair; the effect of subgrade soil and
testing time of year; and design reliability.
6-1
CHAPTER 6
IMPLEMENTATION
ROADHOG is currently being used by AHTD to design flexible pavement overlays.
This project confirms that ROADHOG provides overlay design thicknesses that appear to be
reasonable and consistent with AASHTO design principles. An updated version of the
ROADHOG computer program has been delivered to AHTD for immediate implementation
into routine design practice. The updated version addresses many user comments concerning
the original computer program and fixed a number of user-identified “bugs” in the software.
The Roadway Design section of AHTD has identified a number of desired features
and enhancements to the software that have not yet been incorporated. Many of these
enhancements concern the use of ROADHOG in a “windows” environment (the updated
version of ROADHOG remains a DOS-based program). It is recommended that an open
dialog remain between the Roadway Design staff and the project team to address these
concerns, and that periodic updates to the software be made. In that light, it is anticipated
that research into rigid pavement overlay design (sponsored by AHTD and the Mack-
Blackwell Transportation Center) will be completed in the Fall of 1997, which will result in
Windows-based overlay design tools for rigid pavements. The existing ROADHOG flexible
pavement overlay design procedures could be incorporated into the same Windows-based
format for a comprehensive overlay design software system.
R-1
REFERENCES
1. AASHTO Guide for Design of Pavement Structures. American Association of State Highway and Transportation Officials, Washington, D.C., 1986, 1993.
2. Hall, K.D. and Elliott, R.P., ROADHOG- A Flexible Pavement Overlay Design
Procedure. In Transportation Research Record 1374, TRB, National Research Council, Washington, D.C., 1992, pp.9-16.
3. Elliott, R.P., Hall, K.D., Morrison, N.T., and Hong, K.S., “The Development of ROADHOG, A Flexible Pavement Overlay Design Procedure”, Final Report, TRC- 8705, Report No. UAF-AHTRC-90-001, University of Arkansas, 1990. 4. Ullidtz, P., "Overlay and Stage-by-Stage Design", Proceedings, Fourth International
Conference on Structural Design of Asphalt Pavements, Ann Arbor, Michigan, 1977. 5. Boussinesq, J., Application des Potentials 4'a 'l Equilibre et du Mouvement des
Solides Elastiques. Gauthier-Villars, Paris, 1885. 6. Elliott, R.P., Selection of Subgrade Modulus for AASHTO Flexible Pavement
Design. Presented at the 71st Annual Meeting of the Transportation Research Board, Washington, D.C., 1992.
7. AASHTO Guide for Design of Pavement Structures. Vol. 2, Appendix NN. American
Association of State Highway and Transportation Officials, Washington, D.C., 1986. 8. Odemark, N., Investigations as to the Elastic Properties of Soils and Design of
Pavements According to the Theory of Elasticity. Meddelande 77, Statens Vaginstitut, Stockholm, Sweden, 1949 (English translation by A.M. Ioannides, 1990).
9. Barber, E.S., Author's Closure, comments on C.A. Hagentogler, Jr.'s discussion of
Soil Displacement Under a Circular Loaded Area by L.A. Palmer and E.S. Barber, Proc., Highway Research Board, Vol. 20, 1940.
10. Elliott, R.P. and Thompson, M.R., Mechanistic Design Concepts for Conventional
Flexible Pavements. Transportation Engineering Series No. 42, University of Illinois, Urbana, 1985.
11. ILLIPAVE: A Pavement Analysis Program Provided by the Transportation Facilities
Group. Department of Civil Engineering, University of Illinois at Urbana- Champaign.
12. Thompson, M.R. and Robnett, Q., Final Report- Data Summary, Resilient Properties
of Subgrade Soils. Transportation Engineering Series No. 14, University of Illinois,
R-2
Urbana, 1976. 13. Kong, S.H., Determination of Effective Structural Number in Flexible Pavement
Overlay Design. Master's Thesis, University of Arkansas, Fayetteville, 1989. 14. Kopperman, S., et al, ELSYM5; Interactive Microcomputer Version, User's Manual:
IBM-PC and Compatible Version. Report FHWA-TS-87-206. Federal Highway Administration, U.S. Department of Transportation, 1986.
15. Calibrated Mechanistic Structural Analysis Procedures for Pavements: Phase 2.
Volume II- Appendices. NCHRP Project 1-26, December 1992. 6. Darter, M. I., Elliott, R. P. and Hall, K. T., Revision of AASHTO Pavement Overlay
Design Procedures, Documentation of Design Procedures. NCHRP Project 20-7/Task 39, June 1991.
7. Hall, K.D., Pedologic Based Subgrade Characterization for Low Volume Pavement
Design, PhD Thesis, University of Illinois at Urbana-Champaign, Urbana, Illinois, 1993.
APPENDIX A
ELSI . M.:4 AND ILLI-PAVE MODEL LOAD-RESPONSE DATA
SYMBOL VARIABLE UNIT
AC E Resilient Modulus of the AC ksi
AC t Thickness of Asphalt Concrete inches
Base E Resilient Modulus of the Granular Base psi
Base t Thickness of Granular Base inches
Subgr E Subgrade Soil "Breakpoint" Resilient Modulus psi
D 0 Deflection at Point of Loading inches
D 6 Deflection at 6 Inches from Point of Loading inches
D 12 Deflection at 12 Inches from Point of Loading inches
D 24 Deflection at 24 Inches from Point of Loading inches
D 36 Deflection at 36 Inches from Point of Loading inches
D 48 Deflection at 48 Inches from Point of Loading inches
D 60 _ Deflection at 60 Inches from Point of Loading inches
AC Strain Horizontal Strain at Bottom of AC in/in
Subgr Stress Maximum Normal Stress at Top of Subgrade psi
Subgr Strain Vertical Strain at Top of Subgrade in/in
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APPENDIX B
ROADHOG AND AASHTO OVERLAY THICKNESS DATA
SYMBOL
VARIABLE UNIT
STATION
Properties of the Pavement Layer Profile(use the Pavement Structure Code on the followingpage to decipher the STATION code)
SNeff Effective Structural Number of the Existing Pavement
SNf Structural Number Required to Carry Future Trafficat Varying Reliability Levels (50,75,90,95,99)
Mr Backcalculated Subgrade Resilient Modulus psi
OVERLAY Overlay Thickness Required At Varying inchesTHICKNESS Reliability Levels (50,75,90,95,99)
PAVEMENT STRUCTURE CODE
The purpose of the Pavement Structure Code is to identify the properties of thepavement layer profiles. The P.S.C. is in the form XXXXXXX.00. Each X in thecode has a meaning relating to the pavement profile. The following is a description ofhow to decipher the code.
X1X2X3X4X5X6X7•00
X 1 represents the Model Method used to form the deflection data.(1) ELSYM5(2) ILLI-PAVE
X2 represents the Pavement Type.
(1)
Conventional Flexible Pavement (CFP)
X3 represents the Resilient Modulus of the AC.(1) 100,000 psi(2) 500,000 psi
(3)
1,400,000 psi
X4 represents the AC thickness.(1) 2 in.(2) 4 in.(3) 6 in.(4) 8 in.
X5 represents the Resilient Modulus of the Base.
(1)
30,000 psi
_ (2)
40,000 psi
X6 represents the Base thickness.(1) 8 in.(2) 10 in.
(3 )
12 in.
X, represents the Resilient Modulus of the Subgrade.1,000 psi3,000 psi7,500 psi12,000 psi
cont. PAVEMENT STRUCTURE CODE
EX.41\ IPLEVALUE
Model Method: ELSYM5 1Pavement Type: CFP 1AC Modulus: 500,000 psi 2AC Thickness: 8 in. 4Base Modulus: 40,000 psi 2Base Thickness: 10 in: 2Subgrade Modulus: 12,000 psi 4
PAVEMENT STRUCTURE CODE: 1 1 2 4 2 2 4. 0 0
2' AC 8" BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991131214.00 2.19 4.5 4.9 5.3 5.5 6.0 4202 5.25 6.16 7.07 7.52 8.661121214.00 2.17 4.5 4.9 5.3 5.5 6.0 4202 5.30 6.20 7.11 7.57 8.701111214.00 2.19 4.5 4.9 5.3 5.5 6.0 4202 5.25 6.16 7.07 7.52 8.661131114.00 2.09 4.4 4.8 5.2 5.5 5.9 4394 5.25 6.16 7.07 7.75 8.661121114.00 2.03 4.4 4.8 5.2 5.5 5.9 4394 5.39 6.30 7.20 7.89 8.801111114.00 2.03 4.4 4.8 5.2 5.5 5.9 4394 5.39 6.30 7.20 7.89 8.801131213.00 2.28 6.8 7.3 7.9 8.2 8.9 1060 10.27 11.41 12.77 13.45 15.051121213.00 2.10 6.8 7.3 7.9 8.2 8.9 1060 10.68 11.82 13.18 13.86 15.451111213.00 2.11 6.8 7.3 7.9 8.2 8.9 1060 10.66 11.80 13.16 13.84 15.431131113.00 2.02 6.8 7.3 7.9 8.2 8.9 1060 10.86 12.00 13.36 14.05 15.641121113.00 1.97 6.8 7.3 7.9 8.2 8.9 1060 10.98 12.11 13.48 14.16 15.751111113.00 1.96 6.8 7.3 7.9 8.2 8.9 1060 11.00 12.14 13.50 14.18 15.771131212.00 2.02 6.8 7.3 7.9 8.2 8.9 1060 10.86 12.00 13.36 14.05 15.641121212.00 1.99 6.8 7.3 7.9 8.2 8.9 1060 10.93 12.07 13.43 14.11 15.701111212.00 1.99 6.8 7.3 7.9 8.2 8.9 1060 10.93 12.07 13.43 14.11 15.701131112.00 1.90 6.8 7.3 7.9 8.2 8.9 1060 11.14 12.27 13.64 14.32 15.911121112.00 1.85 6.8 7.3 7.9 8.2 8.9 1060 11.25 12.39 13.75 14.43 16.021111112.00 1.83 6.8 7.3 7.9 8.2 8.9 1060 11.30 12.43 13.80 14.48 16.071131211.00 1.95 6.8 7.3 7.9 8.2 8.9 1060 11.02 12.16 13.52 14.20 15.801121211.00 1.96 6.8 7.3 7.9 8.2 8.9 1060 11.00 12.14 13.50 14.18 15.771111211.00 1.90 6.8 7.3 7.9 8.2 8.9 1060 11.14 12.27 13.64 14.32 15.911131111.00 1.80 6.8 7.3 7.9 8.2 8.9 1060 11.36 12.50 13.86 14.55 16.141121111.00 1.77 6.8 7.3 7.9 8.2 8.9 1060 11.43 12.57 13.93 14.61 16.201111111.00 1.73 6.8 7.3 7.9 8.2 8.9 1060 11.52 12.66 14.02 14.70 16.302131214.00 2.21 3.3 3.7 4.0 4.2 4.5 10672 2.48 3.39 4.07 4.52 5.202121214.00 2.15 3.3 3.6 3.9 4.1 4.5 11340 2.61 3.30 3.98 4.43 5.342111214.00 2.12 3.2 3.5 3.9 4.0 4.4 11683 2.45 3.14 4.05 4.27 5.182131114.00 2.15 3.4 3.7 4.0 4.2 4.6 10346 2.84 3.52 4.20 4.66 5.572121114.00 2.09 3.3 3.6 3.9 4.1 4.5 11003 2.75 3.43 4.11 4.57 5.482111114.00 2.08 3.2 3.5 3.8 4.0 4.4 12031 2.55 3.23 3.91 4.36 5.272131213.00 2.15 3.8 4.2 4.6 4.8 5.2 6871 3.75 4.66 5.57 6.02 6.932121213.00 2.08 3.8 4.1 4.4 4.7 5.1 7394 3.91 4.59 5.27 5.95 6.862111213.00 2.04 3.6 4.0 4.3 4.5 4.9 8221 3.55 4.45 5.14 5.59 6.502131113.00 2.09 3.9 4.3 4.6 4.8 5.3 6617 4.11 5.02 5.70 6.16 7.302121113.00 2.02 3.8 4.1 4.4 4.7 5.1 7394 4.05 4.73 5.41 6.09 7.002111113.00 1.99 3.6 4.0 4.3 4.5 4.9 8221 3.66 4.57 5.25 5.70 6.61
- 2131212.00 2.06 6.0 6.5 7.0 7.3 7.9 1626 8.95 10.09 11.23 11.91 13.272121212.00 1.98 6.0 6.5 7.0 7.3 7.9 1626 9.14 10.27 11.41 12.09 13.452111212.00 1.92 5.6 6.1 6.6 6.9 7.4 2000 8.36 9.50 10.64 11.32 12.452131112.00 1.99 6.1 6.7 7.2 7.5 8.1 1472 9.34 10.70 11.84 12.52 13.892121112.00 1.89 6.0 6.5 7.0 7.3 7.9 1626 9.34 10.48 11.61 12.30 13.662111112.00 1.84 5.5 5.9 6.4 6.7 7.2 2221 8.32 9.23 10.36 11.05 12.182131211.00 2.00 6.8 7.3 7.9 8.2 8.9 1060 10.91 12.05 13.41 14.09 15.682121211.00 1.90 6.8 7.3 7.9 8.2 8.9 1060 11.14 12.27 13.64 14.32 15.912111211.00 1.83 6.8 7.3 7.9 8.2 8.9 1060 11.30 12.43 13.80 14.48 16.072131111.00 1.93 6.8 7.3 7.9 8.2 8.9 1060 11.07 12.20 13.57 14.25 15.842121111.00 1.80 6.8 7.3 7.9 8.2 8.9 1060 11.36 12.50 13.86 14.55 16.142111111.00 _ 1.73 6.8 7.3 7.9 8.2 8.9 _ 1060 11.52 12.66 14.02 14.70 16.30
ROADHOG: 2" AC 8" BASE Overlay Thickness Data
2' AC 10' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)
RELIABILITY LEVEL75 90 95 99
1131224.00 2.52 4.5 4.9 5.3 5.5 6.0 4202 4.50 5.41 6.32 6.77 7.911121224.00 2.46 4.5 4.9 5.3 5.5 6.0 4202 4.64 5.55 6.45 6.91 8.051111224.00 2.46 4.6 5.0 5.4 5.6 6.1 4016 4.86 5.77 6.68 7.14 8.271131124.00 2.34 4.5 4.9 5.3 5.5 6.0 4202 4.91 5.82 6.73 7.18 8.321121124.00 2.25 4.5 4.9 5.3 5.5 6.0 4202 5.11 6.02 6.93 7.39 8.521111124.00 2.21 4.5 4.9 5.3 5.5 6.0 4202 5.20 6.11 7.02 7.48 8.611131223.00 2.45 6.8 7,3 7.9 8.2 8.9 1060 9.89 11.02 12.39 13.07 14.661121223.00 2.39 6.8 7.3 7.9 8.2 8.9 1060 10.02 11.16 12.52 13.20 14.801111223.00 2.38 6.8 7.3 7.9 8.2 8.9 1060 10.05 11.18 12.55 13.23 14.821131123.00 2.27 6.8 7.3 7.9 8.2 8.9 1060 10.30 11.43 12.80 13.48 15.071121123.00 2.18 6.8 7.3 7.9 8.2 8.9 1060 10.50 11.64 13.00 13.68 15.271111123.00 2.13 6.8 7.3 7.9 8.2 8.9 1060 10.61 11.75 13.11 13.80 15.391131222.00 2.35 6.8 7.3 7.9 8.2 8.9 1060 10.11 11.25 12.61 13.30 14.891121222.00 2.30 6.8 7.3 7.9 8.2 8.9 1060 10.23 11.36 12.73 13.41 15.001111222.00 2.26 6.8 7.3 7.9 8.2 8.9 1060 10.32 11.45 12.82 13.50 15.091131122.00 2.15 6.8 7.3 7.9 8.2 8.9 1060 10.57 11.70 13.07 13.75 15.341121122.00 2.05 6.8 7.3 7.9 8.2 8.9 1060 10.80 11.93 13.30 13.98 15.571111122.00 1.99 6.8 7.3 7.9 8.2 8.9 1060 10.93 12.07 13.43 14.11 15.701131221.00 2.08 6.8 7.3 7.9 8.2 8.9 1060 10.73 11.86 13.23 13.91 15.501121221.00 2.13 6.8 7.3 7.9 8.2 8.9 1060 10.61 11.75 13.11 13.80 15.391111221.00 2.22 6.8 7.3 7.9 8.2 8.9 1060 10.41 11.55 12.91 13.59 15.181131121.00 2.01 6.8 7.3 7.9 8.2 8.9 1060 10.89 12.02 13.39 14.07 15.661121121.00 1.93 6.8 7.3 7.9 8.2 8.9 1060 11.07 12.20 13.57 14.25 15.841111121.00 1.93 6.8 7.3 7.9 8.2 8.9 1060 11.07 12.20 13.57 14.25 15.842131224.00 2.49 3.3 3.7 4.0 4.2 4.5 10672 1.84 2.75 3.43 3.89 4.572121224.00 2.38 3.3 3.6 3.9 4.1 4.5 11003 2.09 2.77 3.45 3.91 4.822111224.00 2.31 3.2 3.5 3.9 4.0 4.4 11683 2.02 2.70 3.61 3.84 4.752131124.00 2.40 3.4 3.7 4.0 4.2 4.6 10025 2.27 2.95 3.64 4.09 5.002121124.00 2.29 3.3 3.6 3.9 4.1 4.5 11003 2.30 2.98 3.66 4.11 5.022111124.00 2.23 3.2 3.5 3.8 4.0 4.4 12031 2.20 2.89 3.57 4.02 4.932131223.00 2.42 3.8 4.2 4.6 4.8 5.2 6871 3.14 4.05 4.95 5.41 6.322121223.00 2.30 3.8 4.1 4.4 4.7 5.1 7394 3.41 4.09 4.77 5.45 6.362111223.00 2.23 3.7 4.0 4.4 4.6 5.0 7939 3.34 4.02 4.93 5.39 6.302131123.00 2.32 3.9 4.3 4.7 4.9 5.3 6370 3.59 4.50 5.41 5.86 6.772121123.00 2.19 3.8 4.2 4.5 4.7 5.1 7129 3.66 4.57 5.25 5.70 6.612111123.00 2.12 3.6 4.0 4.3 4.5 4.9 8221 3.36 4.27 4.95 5.41 6.32
- 2131222.00 2.31 6.0 6.5 7.0 7.3 7.9 1626 8.39 9.52 10.66 11.34 12.702121222.00 2.18 6.0 6.5 7.0 7.3 7.9 1626 8.68 9.82 10.95 11.64 13.002111222.00 2.07 5.7 6.2 6.7 7.0 7.5 . 1898 8.25 9.39 10.52 11.20 12.342131122.00 2.20 6.1 6.7 7.2 7.5 8.1 1472 8.86 10.23 11.36 12.05 13.412121122.00 2.03 6.1 6.6 7.1 7.4 8.0 1546 9.25 10.39 11.52 12.20 13.572111122.00 1.93 5.5 6.0 6.5 6.8 7.3 2108 8.11 9.25 10.39 11.07 12.20
2131221.00 2.24 6.8 7.3 7.9 8.2 8.9 1060 10.36 11.50 12.86 13.55 15.14
2121221 .00 2.09 6.8 7.3 7.9 8.2 8.9 1060 10.70 11.84 13.20 13.89 15.48
2111221.00 1.98 6.8 7.3 7.9 8.2 8.9 1060 10.95 12.09 13.45 14.14 15.73
2131121.00 2.12 6.8 7.3 7.9 8.2 8.9 1060 10.64 11.77 13.14 13.82 15.41
2121121.00 1.92 6.8 7.3 7.9 8.2 8.9 1060 11.09 12.23 13.59 14.27 15.862111121.00 1.80 6.8 7.3 7.9 8.2 8.9 1060 11.36 12.50 13.86 14.55 16.14
ROADHOG: 2" AC 10" BASE Overlay Thickness Data
2' AC 12' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991131234.00 2.82 4.5 4.9 5.3 5.5 6.0 4202 3.82 4.73 5.64 6.09 7.231121234.00 2.75 4.6 5.0 5.4 5.6 6.1 4016 4.20 5.11 6.02 6.48 7.611 1 1 1 234.00 2.72 4.6 5.0 5.4 5.6 6.1 4016 4.27 5.18 6.09 6.55 7.681131134.00 2.63 4.5 4.9 5.3 5.5 6.0 4202 4.25 5.16 6.07 6.52 7.661121134.00 2.53 4.5 4.9 5.3 5.5 6.0 4202 4.48 5.39 6.30 6.75 7.891111134.00 2.47 4.5 4.9 5.3 5.5 6.0 4202 4.61 5.52 6.43 6.89 8.021131233.00 2.75 6.8 7.3 7.9 8.2 8.9 1060 9.20 10.34 11.70 12.39 13.981121233.00 2.69 6.8 7.3 7:9 8.2 8.9 1060 9.34 10.48 11.84 12.52 14.111111233.00 2.66 6.8 7.3 7.9 8.2 8.9 1060 9.41 10.55 11.91 12.59 14.181131133.00 2.56 6.8 7.3 7.9 8.2 8.9 1060 9.64 10.77 12.14 12.82 14.411121133.00 2.46 6.8 7.3 7.9 8.2 8.9 1060 9.86 11.00 12.36 13.05 14.641111133.00 2.40 6.8 7.3 7.9 8.2 8.9 1060 10.00 11.14 12.50 13.18 14.771131232.00 2.64 6.8 7.3 7.9 8.2 8.9 1060 9.45 10.59 11.95 12.64 14.231121232.00 2.59 6.8 7.3 7.9 8.2 8.9 1060 9.57 10.70 12.07 12.75 14.341111232.00 2.55 6.8 7.3 7.9 8.2 8.9 1060 9.66 10.80 12.16 12.84 14.431131132.00 2.45 6.8 7.3 7.9 8.2 8.9 1060 9.89 11.02 12.39 13.07 14.661121132.00 2.36 6.8 7.3 7.9 8.2 8.9 1060 10.09 11.23 12.59 13.27 14.861111132.00 2.29 6.8 7.3 7.9 8.2 8.9 1060 10.25 11.39 12.75 13.43 15.021131231.00 2.29 6.8 7.3 7.9 8.2 8.9 1060 10.25 11.39 12.75 13.43 15.021121231.00 2.32 6.8 7.3 7.9 8.2 8.9 1060 10.18 11.32 12.68 13.36 14.951111231.00 2.43 6.8 7.3 7.9 8.2 8.9 1060 9.93 11.07 12.43 13.11 14.701131131.00 2.18 6.8 7.3 7.9 8.2 8.9 1060 10.50 11.64 13.00 13.68 15.271121131.00 2.18 6.8 7.3 7.9 8.2 8.9 1060 10.50 11.64 13.00 13.68 15.271111131.00 2.18 6.8 7.3 7.9 8.2 8.9 1060 10.50 11.64 13.00 13.68 15.272131234.00 2.75 3.4 3.7 4.0 4.2 4.6 10346 1.48 2.16 2.84 3.30 4.202121234.00 2.64 3.3 3.6 3.9 4.1 4.5 11003 1.50 2.18 2.86 3.32 4.232111234.00 2.55 3.2 3.5 3.9 4.0 4.4 11683 1.48 2.16 3.07 3.30 4.202131134.00 2.66 3.4 3.7 4.0 4.2 4.6 10025 1.68 2.36 3.05 3.50 4.412121134.00 2.52 3.3 3.7 4.0 4.2 4.5 10672 1.77 2.68 3.36 3.82 4.502111134.00 2.45 3.2 3.5 3.9 4.0 4.4 11683 1.70 2.39 3.30 3.52 4.432131233.00 2.69 3.8 4.2 4.6 4.8 5.2 6871 2.52 3.43 4.34 4.80 5.702121233.00 2.57 3.8 4.1 4.4 4.7 5.1 7394 2.80 3.48 4.16 4.84 5.752111233.00 2.48 3.7 4.1 4.4 4.6 5.0 7664 2.77 3.68 4.36 4.82 5.732131133.00 2.57 3.9 4.3 4.7 4.9 5.3 6370 3.02 3.93 4.84 5.30 6.202121133.00 2.44 3.8 4.2 4.5 4.7 5.1 7129 3.09 4.00 4.68 5.14 6.052111133.00 2.36 3.7 4.0 4.4 4.6 5.0 7939 3.05 3.73 4.64 5.09 6.00
- 2131232.00 2.58 6.0 6.5 7.0 7.3 7.9 1626 7.77 8.91 10.05 10.73 12.092121232.00 2.46 5.9 6.4 6.9 7.2 7.8 1711 7.82 8.95 10.09 10.77 12.142111232.00 2.36 5.7 6.2 6.7 7.0 7.5 1898 7.59 8.73 9.86 10.55 11.682131132.00 2.46 6.2 6.8 7.3 7.6 8.2 1404 8.50 9.86 11.00 11.68 13.052121132.00 2.31 6.1 6.6 7.1 7.4 8.0 1546 8.61 9.75 10.89 11.57 12.932111132.00 2.21 5.6 6.1 6.6 6.9 7.4 2000 7.70 8.84 9.98 10.66 11.802131231.00 2.52 6.8 7.3 7.9 8.2 8.9 1060 9.73 10.86 12.23 12.91 14.502121231.00 2.39 6.8 7.3 7.9 8.2 8.9 1060 10.02 11.16 12.52 13.20 14.802111231.00 2.28 6.8 7.3 7.9 8.2 8.9 1060 10.27 11.41 12.77 13.45 15.052131131.00 2.39 6.8 7.3 7.9 8.2 8.9 1060 10.02 11.16 12.52 13.20 14.802121131.00 2.21 6.8 7.3 7.9 8.2 8.9 1060 10.43 11.57 12.93 13.61 15.202111131.00 2.09 6.8 7.3 7.9 8.2 8.9 _ 1060 10.70 11.84 13.20 13.89 15.48
ROADHOG: 2" AC 12" BASE Overlay Thickness Data
4' AC 8" BASEROADHOGSTATION
SNeffSNf
RELIABILITY LEVEL50 75 90 95 99
Mr(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991132214.00 3.16 4.7 5.1 5.5 5.8 6.3 3661 3.50 4.41 5.32 6.00 7.141122214.00 3.02 4.6 5.0 5.4 5.6 6.1 4016 3.59 4.50 5.41 5.86 7.001112214.00 2.89 4.6 5.0 5.4 5.6 6.1 4016 3.89 4.80 5.70 6.16 7.301132114.00 3.08 4.6 5.0 5.4 5.7 6.2 3836 3.45 4.36 5.27 5.95 7.091122114.00 2.93 4.6 5.0 5.4 5.6 6.1 4016 3.80 4.70 5.61 6.07 7.201112114.00 2.74 4.5 4.9 5.3 5.5 6.0 4202 4.00 4.91 5.82 6.27 7.411132213.00 3.08 6.8 7.3 7.9 8.2 8.9 1060 8.45 9.59 10.95 11.64 13.231122213 .00 2.95 6.8 7.3 '7.9 8.2 8.9 1060 8.75 9.89 11.25 11.93 13.521112213.00 2.82 6.8 7.3 7.9 8.2 8.9 1060 9.05 10.18 11.55 12.23 13.821132113.00 3.00 6.8 7.3 7.9 8.2 8.9 1060 8.64 9.77 11.14 11.82 13.411122113.00 2.86 6.8 7.3 7.9 8.2 8.9 1060 8.95 10.09 11.45 12.14 13.731112113.00 2.66 6.8 7.3 7.9 8.2 8.9 1060 9.41 10.55 11.91 12.59 14.181132212.00 3.00 6.8 7.3 7.9 8.2 8.9 1060 8.64 9.77 11.14 11.82 13.411122212.00 2.86 6.8 7.3 7.9 8.2 8.9 1060 8.95 10.09 11.45 12.14 13.731112212.00 2.71 6.8 7.3 7.9 8.2 8.9 1060 9.30 10.43 11.80 12.48 14.071132112.00 2.93 6.8 7.3 7.9 8.2 8.9 1060 8.80 9.93 11.30 11.98 13.571122112.00 2.74 6.8 7.3 7.9 8.2 8.9 1060 9.23 10.36 11.73 12.41 14.001112112 .00 2.53 6.8 7.3 7.9 8.2 8.9 1060 9.70 10.84 12.20 12.89 14.481132211.00 2.56 6.8 7.3 7.9 8.2 8.9 1060 9.64 10.77 12.14 12.82 14.411122211.00 2.66 6.8 7.3 7.9 8.2 8.9 1060 9.41 10.55 11.91 12.59 14.181112211.00 2.63 6.8 7.3 7.9 8.2 8.9 1060 9.48 10.61 11.98 12.66 14.251132111.00 2.59 6.8 7.3 7.9 8.2 8.9 1060 9.57 10.70 12.07 12.75 14.341122111.00 2.64 6.8 7.3 7.9 8.2 8.9 1060 9.45 10.59 11.95 12.64 14.231112111.00 2.45 6.8 7.3 7.9 8.2 8.9 1060 9.89 11.02 12.39 13.07 14.662132214.00 3.18 3.4 3.7 4.0 4.2 4.6 10025 0.50 1.18 1.86 2.32 3.232122214.00 2.99 3.4 3.7 4.0 4.2 4.6 10346 0.93 1.61 2.30 2.75 3.662112214.00 2.77 3.3 3.6 3.9 4.1 4.5 11340 1.20 1.89 2.57 3.02 3.932132114.00 3.14 3.5 3.8 4.1 4.3 4.7 9401 0.82 1.50 2.18 2.64 3.552122114.00 2.93 3.4 3.7 4.0 4.2 4.6 10025 1.07 1.75 2.43 2.89 3.802112114.00 2.69 3.2 3.5 3.9 4.0 4.4 11683 1.16 1.84 2.75 2.98 3.892132213.00 3.14 3.9 4.3 4.6 4.8 5.3 6617 1.73 2.64 3.32 3.77 4.912122213.00 2.93 3.9 4.3 4.6 4.8 5.3 6617 2.20 3.11 3.80 4.25 5.392112213.00 2.69 3.7 4.1 4.4 4.6 5.0 7664 2.30 3.20 3.89 4.34 5.252132113.00 3.10 4.0 4.4 4.7 4.9 5.4 6128 2.05 2.95 3.64 4.09 5.232122113.00 2.87 3.9 4.3 4.7 4.9 5.3 6370 2.34 3.25 4.16 4.61 5.522112113.00 2.60 3.7 4.1 4.4 4.6 5.0 7664 2.50 3.41 4.09 4.55 5.452132212.00 3.06 6.0 6.5 7.0 7.3 7.9 1626 6.68 7.82 8.95 9.64 11.002122212.00 2.84 6.1 6.6 7.1 7.4 8.0 1546 7.41 8.55 9.68 10.36 11.732112212 .00 2.57 5.9 6.4 6.9 7.2 7.8 1711 7.57 8.70 9.84 10.52 11.892132112.00 3.02 6.1 6.6 7.1 7.4 8.0 1546 7.00 8.14 9.27 9.95 11.322122112.00 2.76 6.2 6.8 7.3 7.6 8.2 1404 7.82 9.18 10.32 11.00 12.362112112.00 2.58 5.8 6.3 6.8 7.1 7.7 1802 7.32 8.45 9.59 10.27 11.642132211.00 3.02 6.8 7.3 7.9 8.2 8.9 1060 8.59 9.73 11.09 11.77 13.362122211.00 2.78 6.8 7.3 7.9 8.2 8.9 1060 9.14 10.27 11.64 12.32 13.912112211.00 2.49 6.8 7.3 7.9 8.2 8.9 1060 9.80 10.93 12.30 12.98 14.572132111.00 2.96 6.8 7.3 7.9 8.2 8.9 1060 8.73 9.86 11.23 11.91 13.502122111.00 2.70 6.8 7.3 7.9 8.2 8.9 1060 9.32 10.45 11.82 12.50 14.092112111.00 2.35 _ 6.8 7.3 7.9 8.2 8.9 1060 10.11 11.25 12.61 13.30 14.89
ROADHOG: 4" AC 8" BASE Overlay Thickness Data
4' AC 10' BASEROADHOGSTATION
SNeffSNf
RELIABILITY LEVEL50 75 90 95 99
Mr(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991132224.00 3.44 4.6 5.0 5.4 5.7 6.2 3836 2.64 3.55 4.45 5 14 6.271122224.00 3.30 4.6 5.0 5.4 5.6 6.1 4016 2.95 3.86 4.77 5.23 6.361112224.00 3.13 4.6 5.0 5.4 5.6 6.1 4016 3.34 4.25 5.16 5.61 6.751132124.00 3.36 4.6 5.0 5.4 5.7 6.2 3836 2.82 3.73 4.64 5.32 6.451122124.00 3.18 4.6 5.0 5.4 5.6 6.1 4016 3.23 4.14 5.05 5.50 6.641112124.00 2.96 4.5 4.9 5.3 5.5 6.0 4202 3.50 4.41 5.32 5.77 6.911132223.00 3.37 6.8 7.3 7.9 8.2 8.9 1060 7.80 8.93 10.30 10.98 12.571122223.00 3.24 6.8 7.3 7.9 8.2 8.9 1060 8.09 9.23 10.59 11 27 12.861112223.00 3.07 6.8 7.3 7.9 8.2 8.9 1060 8.48 9.61 10.98 11.66 13.251132123.00 3.28 6.8 7.3 7.9 8.2 8.9 1060 8.00 9.14 10.50 11.18 12.771122123.00 3.10 6.8 7.3 7.9 8.2 8.9 1060 8.41 9.55 10.91 11.59 13.181112123.00 2.89 6.8 7.3 7.9 8.2 8.9 1060 8.89 10.02 11.39 12.07 13.661132222.00 3.25 6.8 7.3 7.9 8.2 8.9 1060 8.07 9.20 10.57 11.25 12.841127222 00 3.12 6.8 7.3 7.9 8.2 8.9 1060 8.36 9.50 10.86 11.55 13.141112222.00 2.96 6.8 7.3 7.9 8.2 8.9 1060 8.73 9.86 11.23 11.91 13.501132122.00 3.16 6.8 7.3 7.9 8.2 8.9 1060 8.27 9.41 10.77 11.45 13.051122122.00 2.99 6.8 7.3 7.9 8.2 8.9 1060 8.66 9.80 11.16 11.84 13.4,31112122.00 2.77 6.8 7.3 7.9 8.2 8.9 1060 9.16 10.30 11.66 12.34 13.931132221.00 2.62 6.8 7.3 7.9 8.2 8.9 1060 9.50 10.64 12.00 12.68 14.271122221.00 2.74 6.8 7.3 7.9 8.2 8.9 1060 9.23 10.36 11.73 12.41 14.001112221.00 2.76 6.8 7.3 7.9 8.2 8.9 1060 9.18 10.32 11.68 12.36 13.951132121.00 2.65 6.8 7.3 7.9 8.2 8.9 1060 9.43 10.57 11.93 12.61 14.201122121.00 2.68 6.8 7.3 7.9 8.2 8.9 1060 9.36 10.50 11.86 12.55 14.141112121.00 2.60 6.8 7.3 7.9 8.2 8.9 1060 9.55 10.68 12.05 12.73 14.322132224.00 3.46 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.55 1.23 1.68 2.592122224 00 3.23 3.4 3.7 4.0 4.2 4.6 10346 0.39 1.07 1.75 2.20 3.112112224.00 2.97 3.3 3.6 3.9 4.1 4.5 11340 0.75 1.43 2.11 2.57 3.482132124.00 3.41 3.5 3.8 4.1 4.3 4.7 9401 0.20 0.89 1.57 2.02 2.932122124.00 3.14 3.4 3.8 4.1 4.3 4.7 9710 0.59 1.50 2.18 2.64 3.552112124.00 2.88 3.3 3.6 3.9 4.1 4.5 11340 0.95 1.64 2.32 2.77 3.682132223.00 3.41 3.9 4.3 4.6 4.8 5.3 6617 1.11 2.02 2.70 3.16 4.302122223,00 3.17 3.9 4.3 4.6 4.8 5.3 6617 1.66 2.57 3.25 3.70 4.842112223.00 2.90 3.8 4.1 4.4 4.7 5.1 7394 2.05 2.73 3.41 4.09 5.002132123.00 3.34 4.0 4.4 4.7 4.9 5.4 6128 1.50 2.41 3.09 3.55 4.682122123.00 3.08 4.0 4.4 4.7 4.9 5.4 6128 2.09 3.00 3.68 4.14 5.272112123.002132272.00
2.793.33
3.8 4.1
5.9 6.44.46.9
4.77.2-
5.17.8
73941711
2.305.84
2.986.98
3.668.11
4.348.80
5.2510.16
2122222 00 3.06 6.1 6.6 7.1 7.4 8.0 1546 6.91 8.05 9.18 9.86 11.232112222 00 2.79 5.9 6.4 6.9 7.2 7.8 1711 7.07 8.20 9.34 10.02 11.392132122.00 3.26 6.1 6.7 7.2 7.5 8.1 1472 6.45 7.82 8.95 9.64 11.002122122.00 2.97 6.2 6.8 7.3 7.6 8.2 1404 7.34 8.70 9.84 10.52 11.892112122.00 2.60 5.9 6.4 6.9 7.2 7.8 1711 7.50 8.64 9.77 10.45 11.822132221.00 3.28 6.8 7.3 7.9 8.2 8.9 1060 8.00 9.14 10.50 11.18 12.772122221.00 3.01 6.8 7.3 7.9 8.2 8.9 1060 8.61 9.75 11.11 11.80 13.392112221.00 2.72 6.8 7.3 7.9 8.2 8.9 1060 9.27 10.41 11.77 12.45 14.05
2132121.00 3.22 6.8 7.3 7.9 8.2 8.9 1060 8.14 9.27 10.64 11.32 12.912122121.00 2.91 6.8 7.3 7.9 8.2 8.9 1060 8.84 9.98 11.34 12.02 13.61
2112121.00 2.56 _ 6.8 7.3 7.9 8.2 8.9 _ 1060 9.64 10.77 12.14 12.82 14.41
ROADHOG: 4" AC 10" BASE Overlay Thickness Data
4' AC 12' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991132234.00 3.73 4.6 5.0 5.4 5.6 6.1 4016 1.98 2.89 3.80 4.25 5.391122234.00 3,57 4.6 5.0 5.4 5.6 6.1 4016 2.34 3.25 4.16 4.61 5.751112234.00 3.38 4.6 5.0 5.4 5.6 6.1 4016 2.77 3.68 4.59 5.05 6.181132134.00 3.61 4.6 5.0 5.4 5.7 6.2 3836 2.25 3.16 4.07 4.75 5.891122134.00 3.44 4.6 5.0 5.4 5.6 6.1 4016 2.64 3.55 4.45 4.91 6.051112134.00 3.19 4.5 4.9 5.3 5.5 6.0 4202 2.98 3.89 4.80 5.25 6.391132233.00 3.65 6.8 7.3 7.9 8.2 8.9 1060 7.16 8.30 9.66 10.34 11.931122233.00 3.50 6.8 7.3 7.9 • 8.2 8.9 1060 7.50 8.64 10.00 10.68 12.271112233.00 3.31 6.8 7.3 7.9 8.2 8.9 1060 7.93 9.07 10.43 11.11 12.701132133.00 3.53 6.8 7.3 7.9 8.2 8.9 1060 7.43 8.57 9.93 10.61 12.201122133.00 3.36 6.8 7.3 7.9 8.2 8.9 1060 7.82 8.95 10.32 11.00 12.591112133.00 3.13 6.8 7.3 7.9 8.2 8.9 1060 8.34 9.48 10.84 11.52 13.111132232.00 3.46 6.8 7.3 7.9 8.2 8.9 1060 7.59 8.73 10.09 10.77 12.361122232.00 3.37 6.8 7.3 7.9 8.2 8.9 1060 7.80 8.93 10.30 10.98 12.571112232.00 3.22 6.8 7.3 7.9 8.2 8.9 1060 8.14 9.27 10.64 11.32 12.911132132.00 3.38 6.8 7.3 7.9 8.2 8.9 1060 7.77 8.91 10.27 10.95 12.551122132.00 3.23 6.8 7.3 7.9 8.2 8.9 1060 8.11 9.25 10.61 11.30 12.891112132.00 3.02 6.8 7.3 7.9 8.2 8.9 1060 8.59 9.73 11.09 11.77 13.361132231.00 2.81 6.8 7.3 7.9 8.2 8.9 1060 9.07 10.20 11.57 12.25 13.841122,31.00 2.89 6.8 7.3 7.9 8.2 8.9 1060 8.89 10.02 11.39 12.07 13.661112231.00 2.95 6.8 7.3 7.9 8.2 8.9 1060 8.75 9.89 11.25 11.93 13.521132131.00 2.80 6.8 7.3 7.9 8.2 8.9 1060 9.09 10.23 11.59 12.27 13.861122131.00 2.84 6.8 7.3 7.9 8.2 8.9 1060 9.00 10.14 11.50 12.18 13.771112131.00 2.82 6.8 7.3 7.9 8.2 8.9 1060 9.05 10.18 11.55 12.23 13.822132234.00 3.72 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.18 0.86 1.32 2.232122234.00 3.46 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.55 1.23 1.68 2.592112234.00 3.18 3.3 3.6 3.9 4.1 4.5 11340 0.27 0.95 1.64 2.09 3.002132134.00 3.65 3.5 3.8 4.2 4.4 4.8 9098 . 0.00 0.34 1.25 1.70 2.612122134.00 3.35 3.4 3.8 4.1 4.3 4.7 9710 0.11 1.02 1.70 2.16 3.072112134.00 3.07 3.3 3.6 3.9 4.1 4.5 11340 0.52 1.20 1.89 2.34 3.252132233.00 3.68 3.9 4.3 4.6 4.8 5.3 6617 0.50 1.41 2.09 2.55 3.682122233.00 3.40 3.9 4.3 4.6 4.8 5.3 6617 1.14 2.05 2.73 3.18 4.322112233.00 3.12 3.8 4.1 4.4 4.7 5.1 7394 1.55 2.23 2.91 3.59 4.502132133.00 3.58 4.0 4.4 4.8 5.0 5.4 5891 0.95 1.86 2.77 3.23 4.142122133.00 3.30 4.0 4.4 4.7 4.9 5.4 6128 1.59 2.50 3.18 3.64 4.772112133.00 2.99 3.8 4.1 4.4 4.7 5.1 7394 1.84 2.52 3.20 3.89 4.802132232.00 3.59 5.9 6.4 6.9 7.2 7.8 1711 5.25 6.39 7.52 8.20 9.572122232.00 3.31 6.1 6.6 7.1 7.4 8.0 1546 6.34 7.48 8.61 9.30 10.662112232.00 3.02 5.9 6.4 6.9 7.2 7.8 1711 6.55 7.68 8.82 9.50 10.862132132.00 3.51 6.1 6.7 7.2 7.5 8.1 1472 5.89 7.25 8.39 9.07 10.432122132.00 3.19 6.2 6.8 7.3 7.6 8.2 1404 6.84 8.20 9.34 10.02 11.392112132.00 2.88 6.0 6.5 7.0 7.3 7.9 1626 7.09 8.23 9.36 10.05 11.412132231.00 3.53 6.8 7.3 7.9 8.2 8.9 1060 7.43 8.57 9.93 10.61 12.202122231.00 3.24 6.8 7.3 7.9 8.2 8.9 1060 8.09 9.23 10.59 11.27 12.862112231.00 2.96 6.8 7.3 7.9 8.2 8.9 1060 8.73 9.86 11.23 11.91 13.502132131.00 3.46 6.8 7.3 7.9 8.2 8.9 1060 7.59 8.73 10.09 10.77 12.36
2122131.00 3.12 6.8 7.3 7.9 8.2 8.9 1060 8.36 9.50 10.86 11.55 13.14
2112131.00 _ 2.80 6.8 7.3 7.9 8.2 8.9 1060 _ 9.09 10.23 11.59 12.27 13.86
ROADHOG: 4" AC 12" BASE Overlay Thickness Data
6" AC 8' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991133214.00 3.90 4.7 5 1 5.5 5.8 6.3 3661 1.82 2.73 3.64 4.32 5.451 1 2321 4.00 3.78 4.7 5.1 5.5 5.8 6.3 3661 2.09 3.00 3.91 4.59 5.731113214.00 3.51 4.6 5.0 5.4 5.6 6.1 4016 2.48 3.39 4.30 4.75 5.891133114.00 3.85 4.8 5.2 5.6 5.8 6.3 3492 2.16 3.07 3.98 4.43 5.571123114.00 3.69 4.7 5.1 5.5 5.8 6.3 3661 2.30 3.20 4.11 4.80 5.931113114.00 3.40 4.6 5.0 5.4 5.6 6.1 401 6 2.73 3.64 4.55 5.00 6.141133213.00 3.87 6.8 7.3 7.9 8.2 8.9 1060 6.66 7.80 9.16 9.84 11.431123213.00 3.70 6.8 7.3 7.9 - 8.2 8.9 1060 7.05 8.18 9.55 10.23 11.821113213.00 3.43 6.8 7.3 7.9 8.2 8.9 1060 7.66 8.80 10.16 10.84 12.431133113.00 3.81 6.8 7.3 7.9 8.2 8.9 1060 6.80 7.93 9.30 9.98 11.571123113.00 3.62 6.8 7.3 7.9 8.2 8.9 1060 7.23 8.36 9.73 10.41 12.001113113.00 3.32 6.8 7.3 7.9 8.2 8.9 1060 7.91 9.05 10.41 11.09 12.681133212.00 3.63 6.8 7.3 7.9 8.2 8.9 1060 7.20 8.34 9.70 10.39 11.981123212.00 3.57 6.8 7.3 7.9 8.2 8.9 1060 7.34 8.48 9.84 10.52 12.111113212.00 3.33 6.8 7.3 7.9 8.2 8.9 1060 7.89 9.02 10.39 11.07 12.661133112.00 3.62 6.8 7.3 7.9 8.2 8.9 1060 7.23 8.36 9.73 10.41 12.001123112.00 3.50 6.8 7.3 7.9 8.2 8.9 1060 7.50 8.64 10.00 10.68 12.271113112.00 3.20 6.8 7.3 7.9 8.2 8.9 1060 8.18 9.32 10.68 11.36 12.951133211.00 2.55 6.8 7.3 7.9 8.2 8.9 1060 9.66 10.80 12.16 12.84 14.431123211.00 2.99 6.8 7.3 7.9 8.2 8.9 1060 8.66 9.80 11.16 11.84 13.431113211.00 3.13 6.8 7.3 7.9 8.2 8.9 1060 8.34 9.48 10.84 11.52 13.111133111.00 2.59 6.8 7.3 7.9 8.2 8.9 1060 9.57 10.70 12.07 12.75 14.341123111.00 3.01 6.8 7.3 7.9 8.2 8.9 1060 8.61 9.75 11.11 11.80 13.391113111.00 3.01 6.8 7.3 7.9 8.2 8.9 1060 8.61 9.75 11.11 11.80 13.392133214.00 4.04 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.36 1.272123214.00 3.76 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.55 1.00 1.912113214.00 3.40 3.3 3.6 3.9 4.1 4.5 11003 0.00 0.45 1.14 1.59 2.502133114.00 3.94 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.00 0.36 0.82 1.732123114.00 3.73 3.5 3.8 4.1 4.3 4.7 9401 0.00 0.16 0.84 1.30 2.202113114.00 3.32 3.3 3.7 4.0 4.2 4.5 10672 0.00 . 0.86 1.55 2.00 2.682133213.00 3.93 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.61 1.52 1.98 2.892123213.00 3.70 3.9 4.3 4.6 4.8 5.3 6617 0.45 1.36 2.05 2.50 3.642113213.00 3.34 3.8 4.2 4.5 4.7 5.1 7129 1.05 1.95 2.64 3.09 4.002133113.00 3.93 3.9 4.3 4.7 4.9 5.3 6370 0.00 0.84 1.75 2.20 3.112123113.00 3.65 4.0 4.4 4.7 4.9 5.4 6128 0.80 1.70 2.39 2.84 3.982113113.00 3.25 3.8 4.2 4.5 4.7 5.1 7129 1.25 2.16 2.84 3.30 4.20
-2133212.00 3.87 5.7 6.2 6.7 7.0 7.5 1898 4.16 5.30 6.43 7.11 8.252123212.00 3.62 6.1 6.6 7.1 7.4 8.0 1546 5.64 6.77 7.91 8.59 9.952113212.00 3.23 6.0 6.5 7.0 7.3 7.9 1626 6.30 7.43 8.57 9.25 10.612133112.00 3.86 5.9 6.4 6.9 7.2 7.8 1711 4.64 5.77 6.91 7.59 8.952123112.00 3.56 6.2 6.8 7.3 7.6 8.2 1404 6.00 7.36 8.50 9.18 10.552113112.00 3.13 6.1 6.6 7.1 7.4 8.0 1546 6.75 7.89 9.02 9.70 11.072133211.00 3.82 6.8 7.3 7.9 8.2 8.9 1060 6.77 7.91 9.27 9.95 11.55
2123211.00 3.56 6.8 7.3 7.9 8.2 8.9 1060 7.36 8.50 9.86 10.55 12.142113211.00 3.17 6.8 7.3 7.9 8.2 8.9 1060 8.25 9.39 10.75 11.43 13.022133111.00 3.81 6.8 7.3 7.9 8.2 8.9 1060 6.80 7.93 9.30 9.98 11.572123111.00 3.48 6.8 7.3 7.9 8.2 8.9 1060 7.55 8.68 10.05 10.73 12.32
2113111.00 3.06 6.8 7.3 7.9 8.2 8.9 1060 8.50 9.64 11.00 11.68 13.27
ROADHOG: 6" AC 8" BASE Overlay Thickness Data
6" AC 10* BASEROADHOGSTATION
SNeff50
S NIRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991133224.00 4.27 4.6 5.0 5.4 5.7 6.2 3836 0.75 1.66 2.57 3.25 4.391123224.00 4.05 4.6 5.0 5.4 5.7 6.2 3836 1.25 2.16 3.07 3.75 4.891113224.00 3.73 4.6 5.0 5.4 5.6 6.1 4016 1.98 2.89 3.80 4.25 5.391133124.00 4.19 4.7 5.1 5.5 5.8 6.3 3661 1.16 2.07 2.98 3.66 4.801123124.00 3.94 4.6 5.0 5.4 5.7 6.2 3836 1.50 2.41 3.32 4.00 5.141113124.00 3.60 4.6 5.0 5.4 5.6 6.1 4016 2.27 3.18 4.09 4.55 5.681133223.00 4.20 6.8 7.3 7.9 8.2 8.9 1060 5.91 7.05 8.41 9.09 10.681123223.00 3.98 6.8 7.3 7.9 8.2 8.9 1060 6.41 7.55 8.91 9.59 11.181113223.00 3.67 6.8 7.3 7.9 8.2 8.9 1060 7.11 8.25 9.61 10.30 11.891133123.00 4.09 6.8 7.3 7.9 8.2 8.9 1060 6.16 7.30 8.66 9.34 10.931123123.00 3.88 6.8 7.3 7.9 8.2 8.9 1060 6.64 7.77 9.14 9.82 11.411113123.00 3.54 6.8 7.3 7.9 8.2 8.9 1060 7.41 8.55 9.91 10.59 12.181133222.00 3.84 6.8 7.3 7.9 8.2 8.9 1060 6.73 7.86 9.23 9.91 11.501123222.00 3.80 6.8 7.3 7.9 8.2 8.9 1060 6.82 7.95 9.32 10.00 11.591113222.00 3.56 6.8 7.3 7.9 8.2 8.9 1060 7.36 8.50 9.86 10.55 12.141133122.00 3.81 6.8 7.3 7.9 8.2 8.9 1060 6.80 7.93 9.30 9.98 11.571123122.00 3.71 6.8 7.3 7.9 8.2 8.9 1060 7.02 8.16 9.52 10.20 11.801113122.00 3.41 6.8 7.3 7.9 8.2 8.9 1060 7.70 8.84 10.20 10.89 12.481133221.00 2.82 6.8 7.3 7.9 8.2 8.9 1060 9.05 10.18 11.55 12.23 13.821123221.00 3.11 6.8 7.3 7.9 8.2 8.9 1060 8.39 9.52 10.89 11.57 13.161113221.00 3.26 6.8 7.3 7.9 8.2 8.9 1060 8.05 9.18 10.55 11.23 12.821133121.00 2.84 6.8 7.3 7.9 8.2 8.9 1060 9.00 10.14 11.50 12.18 13.771123121.00 3.13 6.8 7.3 7.9 8.2 8.9 1060 8.34 9.48 10.84 11.52 13.111113121.00 3.17 6.8 7.3 7.9 8.2 8.9 1060 8.25 9.39 10.75 11.43 13.022133224.00 4.36 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.552123224.00 4.01 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.43 1.342113224.00 3.59 3.3 3.6 3.9 4.1 4.5 11003 0.00 0.02 0.70 1.16 2.072133124.00 4.32 3.5 3.8 4.1 4.3 4.7 9401 0.00 0.00 0.00 0.00 0.862123124.00 3.93 3.5 3.8 4.1 4.3 4.7 9401 0.00 0.00 0.39 0.84 1.752113124.00 3.49 3.3 3.7 4.0 4.2 4.5 10672 0.00 0.48 1.16 1.61 2.302133223.00 4.32 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.00 0.64 1.09 2.002123223.00 3.93 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.84 1.52 1.98 3.112113223.00 3.53 3.8 4.2 4.5 4.7 5.1 7129 0.61 1.52 2.20 2.66 3.572133123.00 4.24 3.9 4.3 4.7 4.9 5.3 6370 0.00 0.14 1.05 1.50 2.412123123.00 3.86 4.0 4.4 4.8 5.0 5.4 5891 0.32 1.23 2.14 2.59 3.502113123.00 3.42 3.8 4.2 4.6 4.8 5.2 6871 0.86 1.77 2.68 ' 3.14 4.052133222.00 4.19 5.7 6.2 6.7 7.0 7.5 1898 3.43 4.57 5.70 6.39 7.522123222.00 3.83 6.0 6.5 7.0 7.3 7.9 1626 4.93 6.07 7.20 7.89 9.252113222.00 3.42 6.0 6.5 7.0 7.3 7.9 1626 5.86 7.00 8.14 8.82 10.182133122.00 4.16 5.9 6.4 6.9 7.2 7.8 1711 3.95 5.09 6.23 6.91 8.272123122.00 3.77 6.2 6.8 7.3 7.6 8.2 1404 5.52 6.89 8.02 8.70 10.072113122.00 3.31 6.1 6.6 7.1 7.4 8.0 1546 6.34 7.48 8.61 9.30 10.662133221.00 4.17 6.8 7.3 7.9 8.2 8.9 1060 5.98 7.11 8.48 9.16 10.752123221.00 3.78 6.8 7.3 7.9 8.2 8.9 1060 6.86 8.00 9.36 10.05 11.642113221.00 3.37 6.8 7.3 7.9 8.2 8.9 1060 7.80 8.93 10.30 10.98 12.57
2133121.00 4.10 6.8 7.3 7.9 8.2 8.9 1060 6.14 7.27 8.64 9.32 10.91
2123121.00 3.71 6.8 7.3 7.9 8.2 8.9 1060 7.02 8.16 9.52 10.20 11.80
2113121.00 _ 3.24 6.8 7.3 7.9 8.2 8.9 1060 8.09 9.23 10.59 11.27 12.86
ROADHOG: 6" AC 10" BASE Overlay Thickness Data
6' AC 12' BASEROADHOGSTATION
SNoff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991133234.00 4.57 4.6 5.0 5.4 5.6 6.1 4016 0.07 0.98 1.89 2.34 3.481123234.00 4.32 4.6 5.0 5.4 5.6 6.1 4016 0.64 1.55 2.45 2.91 4.051113234.00 3.97 4.6 5.0 5.4 5.6 6.1 4016 1.43 2.34 3.25 3.70 4.841133134.00 4.45 4.6 5.0 5.4 5.7 6.2 3836 0.34 1.25 2.16 2.84 3.981123134.00 4.18 4.6 5.0 5.4 5.7 6.2 3836 0.95 1.86 2.77 3.45 4.591113134.00 3.83 4.6 5.0 5.4 5.6 6.1 4016 1.75 2.66 3.57 4.02 5.161133233.00 4.45 6.8 7.4 7.9 8.3 9.0 1028 5.34 6.70 7.84 8.75 10.341123233.00 4.23 6.8 7.4 7.9 8.3 9.0 1022 5.84 7.20 8.34 9.25 10.841113233.00 3.91 6.8 7.3 7.9 8.2 8.9 1060 6.57 7.70 9.07 9.75 11.341133133.00 4.34 6.8 7.4 7.9 8.3 9.0 1022 5.59 6.95 8.09 9.00 10.591123133.00 4.10 6.8 7.3 7.9 8.2 8.9 1060 6.14 7.27 8.64 9.32 10.911113133.00 3.76 6.8 7.3 7.9 8.2 8.9 1060 6.91 8.05 9.41 10.09 11.681133232.00 4.05 6.8 7.3 7.9 8.2 8.9 1060 6.25 7.39 8.75 9.43 11.021123232.00 4.00 6.8 7.3 7.9 8.2 8.9 1060 6.36 7.50 8.86 9.55 11.141113232.00 3.79 6.8 7.3 7.9 8.2 8.9 1060 6.84 7.98 9.34 10.02 11.611133132.00 4.02 6.8 7.3 7.9 8.2 8.9 1060 6.32 7.45 8.82 9.50 11.091123132.00 3.92 6.8 7.3 7.9 8.2 8.9 1060 6.55 7.68 9.05 9.73 11.321113132.00 3.64 6.8 7.3 7.9 8.2 8.9 1060 7.18 8.32 9.68 10.36 11.951133231.00 3.13 6.8 7.3 7.9 8.2 8.9 1060 8.34 9.48 10.84 11.52 13.111123231.00 3.32 6.8 7.3 7.9 8.2 8.9 1060 7.91 9.05 10.41 11.09 12.681113231.00 3.42 6.8 7.3 7.9 8.2 8.9 1060 7.68 8.82 10.18 10.86 12.451133131.00 3.13 6.8 7.3 7.9 8.2 8.9 1060 8.34 9.48 10.84 11.52 13.111123131.00 3.32 6.8 7.3 7.9 8.2 8.9 1060 7.91 9.05 10.41 11.09 12.681113131.00 3.34 6.8 7.3 7.9 8.2 8.9 1060 7.86 9.00 10.36 11.05 12.642133234.00 4.66 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.002123234.00 4.22 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.00 0.00 0.18 1.092113234.00 3.79 3.3 3.7 4.0 4.2 4.5 10672 0.00 0.00 0.48 0.93 1.612133134.00 4.60 3.5 3.8 4.2 4.4 4.8 9098 0.00 0.00 0.00 0.00 0.452123134.00 4.13 3.5 3.8 4.2 4.4 4.8 9098 0.00 0.00 0.16 0.61 1.522113134.00 3.67 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.07 0.75 1.20 2.112133233.00 4.60 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.00 0.00 0.45 1.362123233.00 4.16 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.32 1.00 1.45 2.592113233.00 3.72 3.8 4.2 4.5 4.7 5.1 7129 0.18 1.09 1.77 2.23 3.142133133.00 4.48 4.0 4.4 4.7 4.9 5.4 6128 0.00 0.00 0.50 0.95 2.092123133.00 4.07 4.0 4.4 4.8 5.0 5.4 5891 0.00 0.75 1.66 2.11 3.022113133.00 3.61 3.9 4.3 4.6 4.8 5.3 6617 0.66 1.57 2.25 2.70 3.84
- 2133232.00 4.50 5.7 6.2 6.7 7.0 7.5 1898 2.73 3.86 5.00 5.68 6.822123232.00 4.06 6.0 6.5 7.0 7.3 7.9 1626 4.41 5.55 6.68 7.36 8.732113232.00 3.63 5.9 6.4 6.9 7.2 7.8 1711 5.16 6.30 7.43 8.11 9.482133132.00 4.43 5.9 6.4 6.9 7.2 7.8 1711 3.34 4.48 5.61 6.30 7.662123132.00 3.98 6.2 6.8 7.3 7.6 8.2 1404 5.05 6.41 7.55 8.23 9.592113132.00 3.50 6.2 6.7 7.2 7.5 8.1 1472 6.14 7.27 8.41 9.09 10.452133231.00 4.57 6.8 7.3 7.9 8.2 8.9 1060 5.07 6.20 7.57 8.25 9.842123231.00 3.99 6.8 7.3 7.9 8.2 8.9 1060 6.39 7.52 8.89 9.57 11.162113231.00 3.57 6.8 7.3 7.9 8.2 8.9 1060 7.34 8.48 9.84 10.52 12.112133131.00 4.37 6.8 7.3 7.9 8.2 8.9 1060 5.52 6.66 8.02 8.70 10.302123131.00 3.90 6.8 7.3 7.9 8.2 8.9 1060 6.59 7.73 9.09 9.77 11.362113131.00 _ 3.43 _ 6.8 7.3 7.9 8.2 8.9 1060 7.66 8.80 10.16 10.84 12.43
ROADHOG: 6" AC 12" BASE Overlay Thickness Data
8" AC 8' BASEROADHOGSTATION
SNeff50
SNfRELIAB ,..fTY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991134214.00 5.02 4.6 5.0 5.4 5.6 6.1 4016 0.00 0.00 0.86 1.32 2.451124214.00 4.63 4.6 5.0 5.4 5.7 6.2 3836 0.00 0.84 1.75 2.43 3.571114214.00 4.08 4.6 5.0 5.4 5.7 6.2 3836 1.18 2.09 3.00 3.68 4.821134114.00 4.80 4.6 5.0 5.4 5.6 6.1 4016 0.00 0.45 1.36 1.82 2.951124114.00 4.51 4.7 5.1 5.5 5.8 6,3 3661 0.43 1.34 2.25 2.93 4.071114114.00 3.98 4.6 5.0 5.4 5.6 6.1 4016 1.41 2.32 3.23 3.68 4.821134213.00 4.71 6.8 7.3 7.9 8.2 8.9 1059 4.75 5.89 7.25 7.93 9.521124213.00 4.48 6.8 7.3 7.9 8.2 8.9 1060 5.27 6.41 7.77 8.45 10.051114213.00 3.99 6.8 7.3 7.9 8.2 8.9 1060 6.39 7.52 8.89 9.57 11.161134113.00 4.67 6.8 7.4 7.9 8.2 8.9 1041 4.84 6.20 7.34 8.02 9.611124113.00 4.40 6.8 7.3 7.9 8.2 8.9 1060 5.45 6.59 7.95 8.64 10.231114113.00 3.91 6.8 7.3 7.9 8.2 8.9 1060 6.57 7.70 9.07 9.75 11.341134212.00 3.87 6.8 7.3 7.9 8.2 8.9 1060 6.66 7.80 9.16 9.84 11.431124212.00 4.16 6.8 7.3 7.9 8.2 8.9 1060 6.00 7.14 8.50 9.18 10.771114212.00 3.88 6.8 7.3 7.9 8.2 8.9 1060 6.64 7.77 9.14 9.82 11.411134112.00 3.90 6.8 7.3 7.9 8.2 8.9 1060 6.59 7.73 9.09 9.77 11.361124112.00 4.12 6.8 7.3 7.9 8.2 8.9 1060 6.09 7.23 8.59 9.27 10.861114112.00 3.77 6.8 7.3 7.9 8.2 8.9 1060 6.89 8.02 9.39 10.07 11.661134211.00 2.67 6.8 7.3 7.9 8.2 8.9 1060 9.39 10.52 11.89 12.57 14.161124211.00 3.20 6.8 7.3 7.9 8.2 8.9 1060 8.18 9.32 10.68 11.36 12.951114211.00 3.52 6.8 7.3 7.9 8.2 8.9 1060 7.45 8.59 9.95 10.64 12.231134111.00 2.67 6.8 7.3 7.9 8.2 8.9 1060 9.39 10.52 11.89 12.57 14.161124111.00 3.22 6.8 7.3 7.9 8.2 8.9 1060 8.14 9.27 10.64 11.32 12.911114111.00 3.49 6.8 7.3 7.9 8.2 8.9 1060 7.52 8.66 10.02 10.70 12.302134214.00 5.28 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.00 0.00 0.002124214.00 4.67 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.002114214.00 4.00 3.3 3.7 4.0 4.2 4.5 10672 0.00 0.00 0.00 0.45 1.142134114.00 5.22 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.002124114.00 4.59 3.5 3.8 4.1 4.3 4.7. 9401 0.00 0.00 0.00 0.00 0.252114114.00 3.93 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.16 0.61 1.522134213.00 5.02 3.8 4.1 4.4 4.7 5.1 7394 0.00 0.00 0.00 0.00 0.182124213.00 4.57 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.00 0.07 0.52 1.662114213.00 3.93 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.61 1.52 1.98 2.892134113.00 4.96 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.00 0.00 0.00 0.552124113.00 4.45 3.9 4.3 4.7 4.9 5.3 6370 0.00 0.00 0.57 1.02 1.932114113.00 3.85 3.9 4.3 4.6 4.8 5.3 6617 0.11 1.02 1.70 2.16 3.30
- 2134212.00 4.90 5.5 6.0 6.5 6.8 7.3 2108 1.36 2.50 3.64 4.32 5.452124212.00 4.45 5.8 6.3 6.8 7.1 7.7 1802 3.07 4.20 5.34 6.02 7.392114212.00 3.83 6.0 6.5 7.0 7.3 7.9 1626 4.93 6.07 7.20 7.89 9.252134112.00 4.90 5.6 6.1 6.6 6.9 7.4 2000 1.59 2.73 3.86 4.55 5.682124112.00 4.34 6.0 6.5 7.0 7.3 7.9 1626 3.77 4.91 6.05 6.73 8.092114112.00 3.75 6.1 6.7 7.2 7.5 8.1 1472 5.34 6.70 7.84 8.52 9.892134211.00 4.80 6.8 7.3 7.9 8.2 8.9 1060 4.55 5.68 7.05 7.73 9.32
2124211.00 4.34 6.8 7.3 7.9 8.2 8.9 1060 5.59 6.73 8.09 8.77 10.362114211.00 3.77 6.8 7.3 7.9 8.2 8.9 1060 6.89 8.02 9.39 10.07 11.66
2134111.00 4.90 6.8 7.3 7.9 8.2 8.9 1060 4.32 5.45 6.82 7.50 9.092124111.00 4.29 6.8 7.3 7.9 8.2 8.9 1060 5.70 6.84 8.20 8.89 10.482114111.00 3.69 6.8 7.3 7.9 8.2 8.9 1060 7.07 8.20 9.57 10.25 11.84
ROADHOG: 8" AC 8" BASE Overlay Thickness Data
8' AC 10' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991134224.00 5.73 4.5 4.9 5.3 5.5 6.0 4202 0.00 0.00 0.00 0.00 0.611124224.00 4.90 4.6 5.0 5.4 5.6 6.1 4016 0.00 0.23 1.14 1.59 2.731114224.00 4.29 4.6 5.0 5.4 5.6 6.1 4016 0.70 1.61 2.52 2.98 4.111134124.00 5.48 4.6 5.0 5.4 5.6 6.1 4016 0.00 0.00 0.00 0.27 1.411124124.00 4.78 4.6 5.0 5.4 5.7 6.2 3836 0.00 0.50 1.41 2.09 3.231114124.00 4.18 4.6 5.0 5.4 5.6 6.1 4016 0.95 1.86 2.77 3.23 4.361134223.00 5.12 6.7 7.2 7.8 8.1 8.8 1111 3.59 4.73 6.09 6.77 8.361124223.00 4.78 6.8 7.4 '7.9 8.3 9.0 1022 4.59 5.95 7.09 8.00 9.591114223.00 4.23 6.8 7.3 7.9 8.2 8.9 1060 5.84 6.98 8.34 9.02 10.611134123.00 5.12 6.8 7.3 7.9 8.2 8.9 1059 3.82 4.95 6.32 7.00 8.591124123.00 4.65 6.8 7.3 7.9 8.2 8.9 1060 4.89 6.02 7.39 8.07 9.661114123.00 4.10 6.8 7.3 7.9 8.2 8.9 1060 6.14 7.27 8.64 9.32 10.911134222.00 4.15 6.8 7.3 7.9 8.2 8.9 1060 6.02 7.16 8.52 9.20 10.801124222.00 4.33 6.8 7.3 7.9 8.2 8.9 1060 5.61 6.75 8.11 8.80 10.391114222.00 4.08 6.8 7.3 7.9 8.2 8.9 1060 6.18 7.32 8.68 9.36 10.951134122.00 4.15 6.8 7.3 7.9 8.2 8.9 1060 6.02 7.16 8.52 9.20 10.801124122.00 4.31 6.8 7.3 7.9 8.2 8.9 1060 5.66 6.80 8.16 8.84 10.431114122.00 3.97 6.8 7.3 7.9 8.2 8.9 1060 6.43 7.57 8.93 9.61 11.201134221.00 3.07 6.8 7.3 7.9 8.2 8.9 1060 8.48 9.61 10.98 11.66 13.251124221.00 3.43 6.8 7.3 7.9 8.2 8.9 1060 7.66 8.80 10.16 10.84 12.431114221.00 3.66 6.8 7.3 7.9 8.2 8.9 1060 7.14 8.27 9.64 10.32 11.911134121.00 3.06 6.8 7.3 7.9 8.2 8.9 1060 8.50 9.64 11.00 11.68 13.271124121.00 3.44 6.8 7.3 7.9 8.2 8.9 1060 7.64 8.77 10.14 10.82 12.411114121.00 3.62 6.8 7.3 7.9 8.2 8.9 1060 7.23 8.36 9.73 10.41 12.002134224.00 5.90 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.00 0.00 0.002124224.00 4.94 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.002114224.00 4.17 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.00 0.07 0.982134124.00 5.90 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.00 0.00 0.00 0.002124124.00 4.81 3.5 3.8 4.1 4.3 4.7 9401 0.00 0.00 0.00 0.00 0.002114124.00 4.08 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.27 1.182134223.00 5.82 3.8 4.1 4.4 4.7 5.1 7394 0.00 0.00 0.00 0.00 0.002124223.00 4.84 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.00 0.00 0.00 1.052114223.00 4.11 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.20 1.11 1.57 2.482134123.00 5.82 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.00 0.00 0.00 0.002124123.00 4.68 4.0 4.4 4.7 4.9 5.4 6128 0.00 0.00 0.05 0.50 1.642114123.00 4.02 3.9 4.3 4.7 4.9 5.3 6370 0.00 0.64 1.55 2.00 2.912134222.00 5.73 5.4 5.9 6.4 6.7 7.2 2221 0.00 0.39 1.52 2.20 3.342124222.00 4.63 5.8 6.3 6.8 7.1 7.7 1802 2.66 3.80 4.93 5.61 6.982114222.00 4.01 6.0 6.5 7.0 7.3 7.9 1626 4.52 5.66 6.80 7.48 8.842134122.00 5.48 5.6 6.1 6.6 6.9 7.4 2000 0.27 1.41 2.55 3.23 4.362124122.00 4.57 6.0 6.5 7.0 7.3 7.9 1626 3.25 4.39 5.52 6.20 7.572114122.00 3.91 6.1 6.7 7.2 7.5 8.1 1472 4.98 6.34 7.48 8.16 9.522134221.00 5.73 6.8 7.3 7.9 8.2 8.9 1060 2.43 3.57 4.93 5.61 7.202124221.00 4.59 6.8 7.3 7.9 8.2 8.9 1060 5.02 6.16 7.52 8.20 9.802114221.00 3.95 6.8 7.3 7.9 8.2 8.9 1060 6.48 7.61 8.98 9.66 11.252134121.00 5.61 6.8 7.3 7.9 8.2 8.9 1060 2.70 3.84 5.20 5.89 7.482124121.00 4.48 6.8 7.3 7.9 8.2 8.9 1060 5.27 6.41 7.77 8.45 10.052114121.00 _ 3.85 6.8 7.3 7.9 8.2 8.9 _ 1060 6.70 7.84 9.20 9.89 11.48
ROADHOG: 8" AC 10" BASE Overlay Thickness Data
8' AC 12' BASEROADHOGSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(ps)
OVERLAY THICKNESS (in)RELIABILITY LEVEL
50 75 90 95 991134234.00 5.97 4.4 4.8 5.2 5.5 5.9 4394 0.00 0.00 0.00 0.00 0.001124234.00 5.23 4.5 4.9 5.3 5.5 6.0 4202 0.00 0.00 0.16 0.61 1.751114234 .00 4.61 4.5 4.9 5.3 5.5 6.0 4202 0.00 0.66 1.57 2.02 3.161134134.00 5.97 4.5 4.9 5.3 5.5 6.0 4202 0.00 0.00 0.00 0.00 0.071124134.00 5.07 4.6 5.0 5.4 5.6 6.1 4016 0.00 0.00 0.75 1.20 2.341114134.00 4.49 4.6 5.0 5.4 5.6 6.1 4016 0.25 1.16 2.07 2.52 3.661134233.00 5.40 6.5 7.1 7.6 7.9 8.6 1187 2.50 3.86 5.00 5.68 7.271124233.00 5.04 6.8 7.3 7.9 8.2 8.9 1059 4.00 5.14 6.50 7.18 8.771114233.00 4.55 6.8 7.4 7.9 8.3 9.0 1022 5.11 6.48 7.61 8.52 10.111134133.00 5.32 6.7 7.2 7.8 8.1 8.8 1111 3.14 4.27 5.64 6.32 7.911124133.00 4.96 6.8 7.4 7.9 8.3 9.0 1028 4.18 5.55 6.68 7.59 9.181114133.00 4.42 6.8 7.3 7.9 8.2 8.9 1060 5.41 6.55 7.91 8.59 10.181134232.00 4.49 6.8 7.3 7.9 8.2 8.9 1060 5.25 6.39 7.75 8.43 10.021124232.00 4.64 6.8 7.3 7.9 8.2 8.9 1060 4.91 6.05 7.41 8.09 9.681114232.00 4.39 6.8 7.3 7.9 8.2 8.9 1060 5.48 6.61 7.98 8.66 10.251134132.00 4.51 6.8 7.3 7.9 8.2 8.9 1060 5.20 6.34 7.70 8.39 9.981124132.00 4.58 6.8 7.3 7.9 8.2 8.9 1060 5.05 6.18 7.55 8.23 9.821114132.00 4.27 6.8 7.3 7.9 8.2 8.9 1060 5.75 6.89 8.25 8.93 10.521134231.00 3.47 6.8 7.3 7.9 8.2 8.9 1060 7.57 8.70 10.07 10.75 12.341124231.00 3.74 6.8 7.3 7.9 8.2 8.9 1060 6.95 8.09 9.45 10.14 11.731114231.00 3.90 6.8 7.3 7.9 8.2 8.9 1060 6.59 7.73 9.09 9.77 11.361134131.00 3.43 6.8 7.3 7.9 8.2 8.9 1060 7.66 8.80 10.16 10.84 12.431124131.00 3.73 6.8 7.3 7.9 8.2 8.9 1060 6.98 8.11 9.48 10.16 11.751114131.00 3.84 6.8 7.3 7.9 8.2 8.9 1060 6.73 7.86 9.23 9.91 11.502134234.00 6.65 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.00 0.00 0.002124234.00 5.18 3.4 3.7 4.0 4.2 4.6 10025 0.00 0.00 0.00 0.00 0.002114234.00 4.46 3.4 3.7 4.0 4.2 4.6 10346 0.00 0.00 0.00 0.00 0.322134134.00 6.40 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.00 0.00 0.00 0.002124134.00 5.07 3.5 3.8 4.2 4.4 4.8 9098 0.00 0.00 0.00 0.00 0.002114134 .00 4.33 3.4 3.8 4.1 4.3 4.7 9710 0.00 0.00 0.00 0.00 0.842134233.00 6.40 3.8 4.2 4.5 4.7 5.1 7129 0.00 0.00 0.00 0.00 0.002124233.00 5.10 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.00 0.00 0.00 0.452114233.00 4.39 3.8 4.2 4.6 4.8 5.2 6871 0.00 0.00 0.48 0.93 1.842134133.00 6.12 3.9 4.3 4.6 4.8 5.3 6617 0.00 0.00 0.00 0.00 0.002124133.00 4.98 4.0 4.4 4.7 4.9 5.4 6128 0.00 0.00 0.00 0.00 0.952114133.00 4.28 3.9 4.3 4.7 4.9 5.3 6370 0.00 0.05 0.95 1.41 2.322134232.00 6.12 5.4 5.9 6.4 6.7 7.2 2221 0.00 0.00 0.64 1.32 2.452124232.00 4.98 5.8 6.3 6.8 7.1 7.7 1802 1.86 3.00 4.14 4.82 6.182114232.00 4.29 5.9 6.4 6.9 7.2 7.8 1711 3.66 4.80 5.93 6.61 7.982134132.00 5.84 5.7 6.2 6.7 7.0 7.5 1898 0.00 0.82 1.95 2.64 3.772124132.00 4.86 6.1 6.6 7.1 7.4 8.0 1546 2.82 3.95 5.09 5.77 7.142114132.00 4.17 6.1 6.7 7.2 7.5 8.1 1472 4.39 5.75 6.89 7.57 8.932134231.00 6.12 6.8 7.3 7.9 8.2 8.9 1060 1.55 2.68 4.05 4.73 6.322124231.00 4.90 6.8 7.3 7.9 8.2 8.9 1060 4.32 5.45 6.82 7.50 9.092114231.00 4.24 6.8 7.3 7.9 8.2 8.9 1060 5.82 6.95 8.32 9.00 10.592134131.00 5.84 6.8 7.3 7.9 8.2 8.9 1060 2.18 3.32 4.68 5.36 6.952124131.00 4.80 6.8 7.3 7.9 8.2 8.9 1060 4.55 5.68 7.05 7.73 9.322114131.00 4.11 6.8 7.3 7.9 8.2 8.9 1060 _ 6.11 7.25 8.61 9.30 10.89
ROADHOG: 8" AC 12" BASE Overlay Thickness Data
2' AC 8' BASEAASHTOSTATION
SNeffSNf
RELIABILITY LEVEL50 75 90 95 99
Mr(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991131214.00 1.55 4.7 5.2 5.6 5.8 6.3 10526 7.16 8.30 9.20 9.66 10.801121214.00 1.66 4.7 5.2 5.6 5.8 6.3 10526 6.91 8.05 8.95 9.41 10.551111214.00 1.81 4.7 5.2 5.6 5.8 6.3 10526 6.57 7.70 8.61 9.07 10.201131114.00 1.45 4.7 5.1 5.5 5.8 6.3 10714 7.39 8.30 9.20 9.89 11.021121114.00 1.52 4.7 5.1 5.5 5.8 6.3 10714 7.23 8.14 9.05 9.73 10.861111114.00 1.65 4.7 5.1 5.5 5.8 6.3 10714 6.93 7.84 8.75 9.43 10.571131213.00 1.62 5.5 6.0 6.4 6.7 7.3 6452 8.82 9.95 10.86 11.55 12.911121213,00 1.68 5.5 6.0 6.4 6.7 7.3 6452 8.68 9.82 10,73 11.41 12.771111213.00 1.85 5.5 6.0 6.4 6.7 7.3 6452 8.30 9.43 10.34 11.02 12.391131113.00 1.45 5.5 6.0 6.4 6.7 7.3 6522 9.20 10.34 11.25 11.93 13.301121113.00 1.55 5.5 6.0 6.4 6.7 7.3 6522 8.98 10.11 11.02 11.70 13.071111113.00 1.69 5.5 6.0 6.4 6.7 7.3 6522 8.66 9.80 10.70 11.39 12.751131212.00 1.57 7.2 7.8 8.4 8.7 9.5 2532 12.80 14.16 15.52 16.20 18.021121212.00 1.74 7.2 7.8 8.4 8.8 9.5 2521 12.41 13.77 15.14 16.05 17.641111212.00 1.93 7.2 7.8 8.4 8.8 9.5 2490 11.98 13.34 14.70 15.61 17.201131112.00 1.47 7.2 7.8 8.4 8.7 9.5 2532 13.02 14.39 15.75 16.43 18.251121112.00 1.60 7.2 7.8 8.4 8.7 9.5 2532 12.73 14.09 15.45 16.14 17.951111112.00 1.77 7.2 7.8 8.4 8.8 9.5 2510 12.34 13.70 15.07 15.98 17.571131211.00 1.54 9.6 10.4 11.1 11.6 12.5 910 18.32 20.14 21.73 22.86 24.911121211.00 1.75 9.6 10.4 11.2 11.6 12.5 892 17.84 19.66 21.48 22.39 24.431111211.00 1.97 9.8 10.6 11.3 11.8 12.7 850 17.80 19.61 21.20 22.34 24.391131111.00 1.44 9.7 10.4 11.2 11.6 12.6 888 18.77 20.36 22.18 23.09 25.361121111.00 1.63 9.7 10.5 11.2 11.7 12.6 873 18.34 20.16 21.75 22.89 24.931111111.00 1.83 9.8 10.6 11.3 11.8 12.7 843 18.11 19.93 21.52 22.66 24.702131214.00 1.44 4.0 4.3 4.7 4.9 5.3 18750 5.82 6.50 7.41 7.86 8.772121214.00 1.43 3.9 4.2 4.6 4.8 5.2 20000 5.61 6.30 7.20 7.66 8.572111214.00 1.47 3.8 4.2 4.5 4.8 5.2 20690 5.30 6.20 6.89 7.57 8.482131114.00 1.40 4.0 4.4 4.7 5.0 5.4 18182 5.91 6.82 7.50 8.18 9.092121114.00 1.37 3.9 4.3 4.6 4.9 5.3 19355 5.75 6.66 7.34 8.02 8.932111114.00 1.39 3.8 4.2 4.5 4.7 5.1 21429 5.48 6.39 7.07 7.52 8.432131213.00 1.45 4.4 4.8 5.2 5.4 5.9 13333 6.70 7.61 8.52 8.98 10.112121213.00 1.42 4.4 4.7 5.1 5.4 5.8 13953 6.77 7.45 8.36 9.05 9.952111213.00 1.44 4.3 4.6 5.0 5.2 5.7 15000 6.50 7.18 8.09 8.55 9.682131113.00 1.40 4.4 4.8 5.2 5.5 6.0 13043 6.82 7.73 8.64 9.32 10.452121113.00 1.35 4.4 4.7 5.1 5.4 5.8 13953 6.93 7.61 8.52 9.20 10.112111113.00 1.36 4.3 4.6 5.0 5.2 5.7 15000 6.68 7.36 8.27 8.73 9.862131212.00 1.46 5.2 5.6 6.1 6.3 6.9 7895 8.50 9.41 10.55 11.00 12.362121212.00 1.43 5.2 5.6 6.1 6.3 6.9 7895 8.57 9.48 10.61 11.07 12.432111212.00 1.43 5.1 5.5 6.0 6.2 6.8 8333 8.34 9.25 10.39 10.84 12.202131112.00 1.40 5.2 5.7 6.1 6.4 6.9 7692 8.64 9.77 10.68 11.36 12.502121112.00 1.34 5.2 5.6 6.1 6.3 6.9 7895 8.77 9.68 10.82 11.27 12.642111112.00 1.31 5.1 5.5 5.9 6.2 6.7 8571 8.61 9.52 10.43 11.11 12.252131211.00 1.49 5.8 6.2 6.7 7.0 7.6 5556 9.80 10.70 11.84 12.52 13.89
2121211.00 1.43 5.8 6.3 6.7 7.0 7.6 5505 9.93 11.07 11.98 12.66 14.022111211.00 1.41 5.7 6.2 6.7 7.0 7.6 5660 9.75 10.89 12.02 12.70 14.07
2131111.00 1.42 5.8 6.3 6.8 7.0 7.6 5455 9.95 11.09 12.23 12.68 14.052121111.00 1.33 5.8 6.3 6.8 7.1 7.7 5405 10.16 11.30 12.43 13.11 14.48
2111111.00 1.26 _ 5.7 6.2 6.6 6.9 7.5 5769 10.09 11.23 12.14 12.82 14.18
AASHTO: 2" AC 8" BASE Overlay Thickness Data
2" AC 10' BASEAASHTOSTATION
SNeff50
SMRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991131224.00 1.84 4.7 5.2 5.6 5.8 6.3 10526 6.50 7.64 8.55 9.00 10.141121224.00 1.95 4.7 5.2 5.6 5.8 6.3 10526 6.25 7.39 8.30 8.75 9.891111224.00 2.14 4.8 5.2 5.6 5.9 6.4 10345 6.05 6.95 7.86 8.55 9.681131124.00 1.72 4.7 5.2 5.6 5.8 6.3 10526 6.77 7.91 8.82 9.27 10.411121124.00 1.80 4.7 5.2 5.6 5.8 6.3 10526 6.59 7.73 8.64 9.09 10.231111124.00 1.94 4.7 5.2 5.6 5.8 6.3 10526 6.27 7.41 8.32 8.77 9.911131223.00 1.84 5.5 6.0 6.4 6.7 7.3 6452 8.32 9.45 10.36 11.05 12.411121223.00 1.97 5.5 6.0 6.4 , 6.7 7.3 6452 8.02 9.16 10.07 10.75 12.111111223.00 2.17 5.5 6.0 6.5 6.7 7.3 6383 7.57 8.70 9.84 10.30 11.661131123.00 1.72 5.5 6.0 6.4 6.7 7.3 6452 8.59 9.73 10.64 11.32 12.681121123.00 1.83 5.5 6.0 6.4 6.7 7.3 6452 8.34 9.48 10.39 11.07 12.431111123.00 1.98 5.5 6.0 6.4 6.7 7.3 6452 8.00 9.14 10.05 10.73 12.091131222.00 1.83 7.1 7.7 8.3 8.7 9.4 2620 11.98 13.34 14.70 15.61 17.201121222.00 2.03 7.2 7.8 8.3 8.7 9.4 2586 11.75 13.11 14.25 15.16 16.751111222.00 2.25 7.2 7.8 8.4 8.8 9.5 2510 11.25 12.61 13.98 14.89 16.481131122.00 1.70 7.2 7.8 8.3 8.7 9.4 2597 12.50 13.86 15.00 15.91 17.501121122.00 1.86 7.2 7.8 8.3 8.7 9.4 2575 12.14 13.50 14.64 15.55 17.141111122.00 2.06 7.2 7.8 8.4 8.8 9.5 2521 11.68 13.05 14.41 15.32 16.911131221.00 1.71 9.4 10.1 10.9 11.3 12.2 984 17.48 19.07 20.89 21.80 23.841121221.00 1.96 9.5 10.2 10.9 11.4 12.3 958 17.14 18.73 20.32 21.45 23.501111221.00 2.25 9.6 10.4 11.1 11.6 12.5 897 16.70 18.52 20,11 21.25 23.301131121.00 1.64 9.5 10.2 11.0 11.4 12.3 949 17.86 19.45 21.27 22.18 24.231121121.00 1.84 9.5 10.3 11.0 11.5 12.4 930 17.41 19.23 20.82 21.95 24.001111121.00 2.10 9.7 10.4 11.2 11.7 12.6 882 17.27 18.86 20.68 21.82 23.862131224.00 1.71 4.0 4.3 4.7 4.9 5.3 18750 5.20 5.89 6.80 7.25 8.162121224.00 1.72 3.9 4.3 4.6 4.9 5.3 19355 4.95 5.86 6.55 7.23 8.142111224.00 1.76 3.8 4.2 4.5 4.8 5.2 20690 4.64 5.55 6.23 6.91 7.822131124.00 1.65 4.0 4.4 4.8 5.0 5.4 17647 5.34 6.25 7.16 7.61 8.522121124.00 1.63 3.9 4.3 4.6 4.9 5.3 19355 5.16 6.07 6.75 7.43 8.342111124.00 1.67 3.8 4.2 4.5 4.7 5.1 21429 4.84 5.75 6.43 6.89 7.802131223.00 1.71 4.4 4.8 5.2 5.4 5.9 13333 6.11 7.02 7.93 8.39 9.522121223.00 1.70 4.4 4.7 5.1 5.4 5.8 13953 6.14 6.82 7.73 8.41 9.322111223.00 1.75 4.3 4.7 5.1 5.3 5.8 14634 5.80 6.70 7.61 8.07 9.202131123.00 1.64 4.5 4.9 5,3 5.5 6.0 12766 6.50 7.41 8.32 8.77 9.912121123.00 1.61 4.4 4.8 52 5.4 5.9 13636 6.34 7.25 8.16 8.61 9.752111123.00 1.64 4.3 4.6 5.0 5.2 5.7 15000 6.05 6.73 7.64 8.09 9.232131222.00 1.71 5.2 5.6 6.1 6.3 6.9 7895 7.93 8.84 9.98 10.43 11.802121222.00 1.70 5.2 5.6 6.1 6.3 6.9 7895 7.95 8.86 10.00 10.45 11.822111222.00 1.74 5.1 5.6 6.0 6.3 6.8 8219 7.64 8.77 9.68 10.36 11.502131122.00 1.63 5.2 5.7 6.1 6.4 6.9 7692 8.11 9.25 10.16 10.84 11.982121122 .00 1.59 5.2 5.7 6.1 6.4 6.9 7792 8.20 9.34 10.25 10.93 12.072111122.00 1.59 5.1 5.5 5.9 6.2 6.7 8451 7.98 8.89 9.80 10.48 11.612131221.00 1.72 5.7 6.2 6.7 7.0 7.6 5607 9.05 10.18 11.32 12.00 13.362121221.00 1.70 5.8 6.2 6.7 7.0 7.6 5556 9.32 10.23 11.36 12.05 13.412111221.00 1.72 5.7 6.2 6.7 7.0 7.6 5660 9.05 10.18 11.32 12.00 13.36
2131121.00 1.63 5.8 6.3 6.7 7.0 7.6 5505 9.48 10.61 11.52 12.20 13.572121121.00 1.57 5.8 6.3 6.8 7.0 7.6 5455 9.61 10.75 11.89 12.34 13.702111121.00 1.55 5.7 6.2 6.7 7.0 7.5 5714 9.43 10.57 11.70 12.39 13.52
AASHTO: 2" AC 10" BASE Overlay Thickness Data
2' AC 12' BASEAASHTOSTATION
SN effSNf
RELIABILITY LEVEL50 75 90 95 99
Mr(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991131234.00 2.13 4.7 5.2 5.6 5.8 6.3 10526 5.84 6.98 7.89 8.34 9.481 121234.00 2.27 4.8 5.2 5.6 5.9 6.4 10345 5.75 6.66 7.57 8.25 9.391 1 11234.00 2.45 4.8 5.2 5.6 5.9 6.4 10345 5.34 6.25 7.16 7.84 8.981 1 31 134.00 1.99 4.7 5.2 5.6 5.8 6.3 10526 6.16 7.30 8.20 8.66 9.801121134.00 2.08 4.7 5.2 5.6 5.8 6.3 10526 5.95 7.09 8.00 8.45 9.591 1 1 1134.00 2.22 4.7 5.2 5.6 5.8 6.3 10526 5.64 6.77 7.68 8.14 9.271131233.00 2.12 5.5 6.0 6.4 6.7 7.3 6522 7.68 8.82 9.73 10.41 11.771121233.00 2.28 5.5 6.0 6.4' 6.7 7.3 6452 7.32 8.45 9.36 10.05 11.411111233.00 2.49 5.5 6.0 6.5 6.7 7.3 6383 6.84 7.98 9.11 9.57 10.931131133.00 1.98 5.5 6.0 6.4 6.7 7.3 6522 8.00 9.14 10.05 10.73 12.091121133.00 2.09 5.5 6.0 6.4 6.7 7.3 6522 7.75 8.89 9.80 10.48 11.841111133.00 2.26 5.5 6.0 6.4 6.7 7.3 6452 7.36 8.50 9.41 10.09 11.451131232.00 2.07 7.1 7.6 8.2 8.6 9.3 2740 11.43 12.57 13.93 14.84 16.431121232.00 2.29 7.1 7.7 8.2 8.6 9.3 2691 10.93 12.30 13.43 14.34 15.931111232.00 2.55 7.2 7.8 8.3 8.7 9.4 2575 10.57 11.93 13.07 13.98 15.571131132.00 1.94 7.1 7.7 8.2 8.6 9.3 2691 11.73 13.09 14.23 15.14 16.731121132.00 2.12 7.1 7.7 8.3 8.6 9.3 2655 11.32 12.68 14.05 14.73 16.321111132.00 2.34 7.2 7.8 8.4 8.7 9.4 2564 11.05 12.41 13.77 14.45 16.051131231.00 1.89 9.2 9.9 10.6 11.1 12.0 1066 16.61 18.20 19.80 20.93 22.981121231.00 2.15 9.3 10.0 10.7 11.2 12.1 1033 16.25 17.84 19.43 20.57 22.6111 1 1231.00 2.49 9.5 10.2 11.0 11.4 12.3 952 15.93 17.52 19.34 20.25 22.301131131.00 1.80 9.3 10.0 10.8 11.2 12.1 1020 17.05 18.64 20.45 21.36 23.411121131 .00 2.04 9.4 10.1 10.8 11.3 122 995 16.73 18.32 19.91 21.05 23.091111131.00 2.33 9.5 10.3 11.0 11.5 12.4 930 16.30 18.11 19.70 20.84 22.892131234.00 1.99 4.0 4.4 4.7 5.0 5.4 18182 4.57 5.48 6.16 6.84 7.752121234.00 1.99 3.9 4.3 4.6 4.9 5.3 19355 4.34 5.25 5.93 6.61 7.522111234.00 2.06 3.8 4.2 4.5 4.8 5.2 20690 3.95 4.86 5.55 6.23 7.142131134.00 1.90 4.0 4.4 4.8 5.0 5.4 17647 4.77 5.68 6.59 7.05 7.952121134.00 1,90 4.0 4.3 4.7 4.9 5.3 18750 4.77 5.45 6.36 6.82 7.732111134.00 1.95 3.8 4.2 4.5 4.8 5.2 20690 4.20 5.11 5.80 6.48 7.392131233.00 1.97 4.4 4.8 5.2 5.4 5.9 13333 5.52 6.43 7.34 7.80 8.932121233.00 1.97 4.4 4.7 5.1 5.4 5.8 13953 5.52 6.20 7.11 7.80 8.702111233,00 2.05 4.3 4.7 5.1 5.3 5.8 14286 5.11 6.02 6.93 7.39 8.522131133.00 1.88 4.5 4.9 5.3 5.5 6.0 12766 5.95 6.86 7.77 8.23 9.362121133.00 1.87 4.4 4.8 5.2 5.4 5.9 13636 5.75 6.66 7.57 8.02 9.1621 1 1133.00 1.92 4.3 4.7 5.1 5.3 5.8 14634 5.41 6.32 7.23 7.68 8.82
-2131232.00 1.95 5.2 5.6 6.1 6.3 6.9 7895 7.39 8.30 9.43 9.89 11.252121232.00 1.96 5.2 5.6 6.0 6.3 6.9 8000 7.36 8.27 9.18 9.86 11.232111232.00 2.04 5.1 5.6 6.0 6.3 6.8 8219 6.95 8.09 9.00 9.68 10.822131132.00 1.87 5.2 5.7 6.1 6.4 7.0 7595 7.57 8.70 9.61 10.30 11.662121132.00 1.84 5.2 5.7 6.1 6.4 6.9 7792 7.64 8.77 9.68 10.36 11.502111132.00 1.88 5.1 5.5 6.0 6.2 6.8 8333 7.32 8.23 9.36 9.82 11.182131231.00 1.95 5.7 6.2 6.7 7.0 7.6 5660 8.52 9.66 10.80 11.48 12.842121231.00 1.96 5.7 6.2 6.7 7.0 7.6 5607 8.50 9.64 10.77 11.45 12.822111231.00 2.04 5.7 6.2 6.7 7.0 7.6 5660 8.32 9.45 10.59 11.27 12.642131131.00 1.86 5.8 6.3 6.8 7.0 7.6 5455 8.95 10.09 11.23 11.68 13.052121131.00 1.82 5.8 6.3 6.8 7.0 7.6 5455 9.05 10.18 11.32 11.77 13.142111131.00 1.85 _ 5.7 6.2 6.7 7.0 7.6 5660 8.75 9.89 11.02 11.70 13.07
AASHTO: 2" AC 12" BASE Overlay Thickness Data
4' AC 8" BASEAASHTOSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991132214.00 2.34 4.8 5.2 5.7 5.9 6.4 10000 5.59 6.50 7.64 8.09 9.231122214.00 2.32 4.8 5.2 5.6 5.9 6.4 10345 5.64 6.55 7.45 8.14 9.271112214.00 2.30 4.8 5.2 5.6 5.9 6.4 10345 5.68 6.59 7.50 8.18 9.321132114.00 2.25 4.8 5.2 5.6 5.9 6.4 10169 5.80 6.70 7.61 8.30 9.431122114.00 2.21 4.8 5.2 5.6 5.9 6.4 10345 5.89 6.80 7.70 8.39 9.521112114.00 2.14 4.7 5.2 5.6 5.8 6.3 10526 5.82 6.95 7.86 8.32 9.451132213.00 2.30 5.6 6.0 6.5 6.8 7.4 6250 7.50 8.41 9.55 10.23 11.591122213.00 2.33 5.5 6.0 6.5 6.8 7.3 6316 7.20 8.34 9.48 10.16 11.301112213.00 2.32 5.5 6.0 6.5 6.7 7.3 6383 7.23 8.36 9.50 9.95 11.321132113.00 2.22 5.6 6.0 6.5 6.8 7.4 6250 7.68 8.59 9.73 10.41 11.771122113.00 2.21 5.5 6.0 6.5 6.7 7.3 6383 7.48 8.61 9.75 10.20 11.571112113.00 2.16 5.5 6.0 6.4 6.7 7.3 6452 7.59 8.73 9.64 10.32 11.681132212.00 2.19 7.1 7.7 8.3 8.7 9.4 2620 11.16 12.52 13.89 14.80 16.391122212.00 2.30 7.2 7.8 8.3 8.7 9.4 2575 11.14 12.50 13.64 14.55 16.141112212 .00 2.38 7.2 7.8 8.4 8.8 9.5 2521 10.95 12.32 13.68 14.59 16.181132112.00 2.12 7.2 7.8 8.3 8.7 9.4 2586 11.55 12.91 14.05 14.95 16.551122112.00 2.18 7.2 • 7.8 8.4 8.7 9.4 2553 11.41 12.77 14.14 14.82 16.411112112.00 2.22 7.2 7.8 8.4 8.8 9.5 2521 11.32 12.68 14.05 14.95 16.551132211.00 1.93 9.3 10.1 10.8 11.2 12.1 1010 16.75 18.57 20.16 21.07 23.111122211.00 2.13 9.4 10.2 10.9 11.4 12.3 963 16.52 18.34 19.93 21.07 23.111112211.00 2.33 9.6 10.4 11.1 11.6 12.5 902 16.52 18.34 19.93 21.07 23.111132111.00 1.89 9.4 10.1 10.9 11.3 12.2 984 17.07 18.66 20.48 21.39 23.431122111.00 2.06 9.5 10.3 11.0 11.5 12.4 935 16.91 18.73 20.32 21.45 23.501112111.00 2.20 9.7 10.4 11.2 11.6 12.6 886 17.05 18.64 20.45 21.36 23.642132214.00 2.37 4.0 4.4 4.8 5.0 5.4 17647 3.70 4.61 5.52 5.98 6.892122214.00 2.15 4.0 4.4 4.7 5.0 5.4 18182 4.20 5.11 5.80 6.48 7.392112214.00 1.92 3.9 4.2 4.6 4.8 5.2 20000 4.50 5.18 6.09 6.55 7.452132114.00 2.33 4.1 4.5 4.9 5.1 5.5 16667 4.02 4.93 5.84 6.30 7.202122114.00 2.07 4.0 4.4 4.8 5.0 5.4 17647 4.39 5.30 6.20 6.66 7.572112114.00 1.82 3.8 4.2 4.5 4.8 5.2 20690 4.50 5.41 6.09 6.77 7.682132213.00 2.37 4.4 4.8 5.2 5. 5 6.0 13043 4.61 5.52 6.43 7.11 8.252122213.00 2.16 4.4 4.8 5.2 5.5 6.0 13043 5.09 6.00 6.91 7.59 8.732112213.00 1.91 4.3 4.7 5.1 5.3 5.8 14286 5.43 6.34 7.25 7.70 8.842132113.00 2.33 4.5 4.9 5.3 5.5 6.0 12500 4.93 5.84 6.75 7.20 8.342122113.00 2.07 4.5 4.9 5.3 5.5 6.0 12766 5.52 6.43 7.34 7.80 8.932112113.00 1.81 4.3 4.7 5.1 5.3 5.8 14286 5.66 6.57 7.48 7.93 9.07
- 2132212.00 2.39 5.2 5.6 6.1 6.3 6.9 7895 6.39 7.30 8.43 8.89 10.252122212.00 2.16 5.2 5.7 6.1 6.4 6.9 7792 6.91 8.05 8.95 9.64 10.772112212.00 1.92 5.2 5.6 6.0 6.3 6.9 8000 7.45 8.36 9.27 9.95 11.322132112.00 2.33 5.2 5.7 6.1 6.4 6.9 7792 6.52 7.66 8.57 9.25 10.392122112.00 2.08 5.2 5.7 6.1 6.4 7.0 7595 7.09 8.23 9.14 9.82 11.182112112.00 1.84 5.1 5.6 6.0 6.3 6.8 8108 7.41 8.55 9.45 10.14 11.272132211.00 2.40 5.7 6.2 6.7 7.0 7.5 5714 7.50 8.64 9.77 10.45 11.592122211.00 2.18 5.8 6.3 6.7 7.0 7.6 5505 8.23 9.36 10.27 10.95 12.322112211.00 1.93 5.8 6.2 6.7 7.0 7.6 5556 8.80 9.70 10.84 11.52 12.892132111.00 2.35 5.7 6.2 6.7 7.0 7.6 5607 7.61 8.75 9.89 10.57 11.932122111.00 2.09 5.8 6.3 6.8 7.1 7.7 5405 8.43 9.57 10.70 11.39 12.752112111.00 1.79 5.8 6.3 6.7 7.0 7.6 5505 _ 9.11 10.25 11.16 11.84 13.20
AASHTO: 4" AC 8" BASE Overlay Thickness Data
4' AC 10" BASEAASHTOSTATION
SNeff50
S NfRE LABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991132224.00 2.62 4.8 5.2 5.6 5.9 6.4 10169 4.95 5.86 6.77 7.45 8.591122224.00 2.64 4.8 5.2 5.6 5.9 6.4 10345 4.91 5.82 6.73 7.41 8.551112224.00 2.62 4.8 5.2 5.6 5.9 6.4 10345 4.95 5.86 6.77 7.45 8.591132124.00 2.53 4.8 5.2 5.6 5.9 6.4 10169 5.16 6.07 6.98 7.66 8.801122124.00 2.50 4.8 5.2 5.6 5.9 6.4 10345 5.23 6.14 7.05 7.73 8.861112124.00 2.43 4.7 5.2 5.6 5.8 6.3 10526 5.16 6.30 7.20 7.66 8.801132223.00 2.58 5.5 6.0 6.5 6.7 7.3 6383 6.64 7.77 8.91 9.36 10.731122223.00 2.64 5.5 6.0 6.5 6.7 7.3 6383 6.50 7.64 8.77 9.23 10.591112223.00 2.66 5.5 6.0 6.5 6.7 7.3 6383 6.45 7.59 8.73 9.18 10.551132123.00 2.47 5.5 6.0 6.5 6.7 7.3 6383 6.89 8.02 9.16 9.61 10.981122123.00 2.49 5.5 6.0 6.5 6.7 7.3 6383 6.84 7.98 9.11 9.57 10.931112123.00 2.46 5.5 6.0 6.4 6.7 7.3 6452 ' 6.91 8.05 8.95 9.64 11.001132222.00 2.42 7.1 7.6 8.2 8.6 9.3 2740 10.64 11.77 13.14 14.05 15.641122222.00 2.56 7.1 7.7 8.3 8.6 9.3 2679 10.32 11.68 13.05 13.73 15.321112222.00 2.69 7.2 7.8 8.3 8.7 9.4 2586 10.25 11.61 12.75 13.66 15.251132122.00 2.33 7.1 7.7 8.3 8.6 9.3 2679 10.84 12.20 13.57 14.25 15.841122122.00 2.44 7.1 7.7 8.3 8.6 9.4 2632 10.59 11.95 13.32 14.00 15.821112122.00 2.50 7.2 7.8 8.3 8.7 9.4 2575 10.68 12.05 13.18 14.09 15.681132221.00 2.07 9.1 9.9 10.6 11.0 11.9 1083 15.98 17.80 19.39 20.30 22.341122221 00 2.31 9.3 10.0 10.7 11.2 12.0 1036 15.89 17.48 19.07 20.20 22.021112221.00 2.56 9.4 10.2 10.9 11.4 12.3 963 15.55 17.36 18.95 20.09 22.141132121.00 2.03 9.2 10.0 10.7 11.1 1 .2.0 1043 16.30 18.11 19.70 20.61 22.661122121.00 2.22 9.3 10.1 10.8 11.3 12.2 1000 16.09 17.91 19.50 20.64 22.681112121.00 2.43 9.5 10.3 11.0 11.5 12.4 939 16.07 17.89 19.48 20.61 22.662132224.00 2.64 4.0 4.4 4.8 5.0 5.4 17647 3.09 4.00 4.91 5.36 6.272122224.00 2.43 4.0 4.4 4.7 5.0 5.4 18182 3.57 4.48 5.16 5.84 6.752112224.00 2.21 3.9 4.2 4.6 4.8 5.2 20000 3.84 4.52 5.43 5.89 6.802132124.00 2.58 4.1 4.5 4.9 5.1 5.5 16667 3.45 4.36 5.27 5.73 6.642122124.00 2.35 4.1 4.5 4.8 5.0 5.5 17143 3.98 4.89 5.57 6.02 7.162112124.00 2.11 3.9 4.2 4.6 4.8 5.2 20000 4.07 4.75 5.66 6.11 7.022132223.00 2.63 4.4 4.8 52 5.5 6.0 13043 4.02 4.93 5.84 6.52 7.662122223.00 2.43 4.4 4.8 5.2 5.5 6.0 13043 4.48 5.39 6.30 6.98 8.112112223,00 2.22 4.4 4.7 5.1 5.4 5.8 13953 4.95 5.64 6.55 7.23 8.142132123.00 2.56 4.5 4.9 5.3 5.5 6.0 12500 4.41 5.32 6.23 6.68 7.822122123.00 2.34 4.5 4.9 5.3 5.5 6.0 12500 4.91 5.82 6.73 7.18 8.322112123.00 2.09 4.4 4.7 5.1 5.4 5.8 13953 5.25 5.93 6.84 7.52 8.43
- 2132222 00 2.62 5.2 5.6 6.0 6.3 6.9 8000 5.86 6.77 7.68 8.36 9.732122222.00 2.42 5.2 5.7 6.1 6.4 6.9 7792 6.32 7.45 8.36 9.05 10.182112222.00 2.22 5.2 5.6 6.0 6.3 6.9 8000 6.77 7.68 8.59 9.27 10.642132122.00 2.55 5.2 5.7 6.1 6.4 6.9 7692 6.02 7.16 8.07 8.75 9.892122122.00 2.32 5.2 5.7 6.1 6.4 7.0 7595 6.55 7.68 8.59 9.27 10.642112122.00 2.07 5.2 5.6 6.0 6.3 6.9 8000 7.11 8.02 8.93 9.61 10.982132221.00 2.60 5.7 6.2 6.6 6.9 7.5 5769 7.05 8.18 9.09 9.77 11.142122221 00 2.42 5.8 6.2 6.7 7.0 7.6 5556 7.68 8.59 9.73 10.41 11.772112221.00 2.22 5.7 62 6.7 7.0 7.6 5607 7.91 9.05 10.18 10.86 12.232132121.00 2.55 5.7 62 6.7 7.0 7.6 5607 7.16 8.30 9.43 10.11 11.482122121.00 2.31 5.8 6.3 6.8 7.1 7.7 5405 7.93 9.07 10.20 10.89 12.252112121.00 2.06 5.8 6.3 6.7 7.0 7.6 5505 8.50 9.64 10.55 11.23 12.59
AASHTO: 4" AC 10" BASE Overlay Thickness Data
4" AC 12' BASEAASHTOSTATION
S Neff
-50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi)
OVERLAY THICKNESS (in)RELIABILITY LEVEL
50 75 90 95 991132234.00 2.93 4.8 5.2 5.6 5.9 6.4 10345 4.25 5.16 6.07 6.75 7.891122234.00 2.97 4.8 5.2 5.6 5.9 6.4 10345 4.16 5.07 5.98 6.66 7.801112234.00 2.95 4.8 5.2 5.6 5.9 6.4 10345 4.20 5.11 6.02 6.70 7.841132134.00 2.82 4.8 5.2 5.6 5.9 6.4 10169 4.50 5.41 6.32 7.00 8.141122134.00 2.81 4.8 5.2 5.6 5.9 6.4 10345 4.52 5.43 6.34 7.02 8.161112134.00 2.74 4.7 5.2 5.6 5.8 6.3 10526 4.45 5.59 6.50 6.95 8.091132233.00 2.85 5.5 5.9 6.4 6.7 7.2 6593 6.02 6.93 8.07 8.75 9.891122233.00 2.94 5.5 6.0 6.4 6.7 7.3 6522 5.82 6.95 7.86 8.55 9.911112233.00 2.97 5.5 6.0 6.4 6.7 7.3 6452 5.75 6.89 7.80 8.48 9.841132133.00 2.75 5.5 6.0 6.4 6.7 7.3 6452 6.25 7.39 8.30 8.98 10.341122133.00 2.78 5.5 6.0 6.4 6.7 7.3 6522 6.18 7.32 8.23 8.91 10.271112133.00 2.77 5.5 6.0 6.4 6.7 7.3 6452 6.20 7.34 8.25 8.93 10.301132232.00 2.64 7.0 7.5 8.1 8.4 9.1 2871 9.91 11.05 12.41 13.09 14.681122232.00 2.82 7.0 7.6 8.1 8.5 9.2 2804 9.50 10.86 12.00 12.91 14.501112232.00 2.98 7.1 7.7 8.3 8.6 9.3 2679 9.36 10.73 12.09 12.77 14.361132132.00 2.55 7.0 7.6 8.2 8.5 9.2 2791 10.11 11.48 12.84 13.52 15.111122132.00 2.68 7.1 7.6 8.2 8.6 9.3 2740 10.05 11.18 12.55 13.45 15.051112132.00 2.79 7.1 7.7 8.3 8.6 9.3 2643 9.80 11.16 12.52 13.20 14.801132231.00 2.23 9.0 9.7 10.4 10.8 11.7 1165 15.39 16.98 18.57 19.48 21.521122231.00 2.47 9.1 9.8 10.5 10.9 11.8 1117 15.07 16.66 18.25 19.16 21.201112231.00 2.77 9.3 10.0 10.7 11.2 12.1 1029 14.84 16.43 18.02 19.16 21.201132131.00 2.18 9.1 9.8 10.5 10.9 11.8 1113 15.73 17.32 18.91 19.82 21.861122131.00 2.39 9.2 9.9 10.6 11.1 11.9 1070 15.48 17.07 18.66 19.80 21.611112131.00 2.64 9.4 10.1 10.8 11.3 12.2 998 15.36 16.95 18.55 19.68 21.732132234.00 2.95 4.1 4.5 4.8 5.0 5.5 17143 2.61 3.52 4.20 4.66 5.802122234.00 2.72 4.0 4.4 4.7 5.0 5.4 18182 2.91 3.82 4.50 5.18 6.092112234.00 2.51 3.9 4.2 4.6 4.8 5.2 20000 3.16 3.84 4.75 5.20 6.112132134.00 2.84 4.2 4.5 4.9 5.1 5.6 16216 3.09 3.77 4.68 5.14 6.272122134.00 2.61 4.1 4.5 4.8 5.0 5.5 17143 3.39 4.30 4.98 5.43 6.572112134.00 2.38 3.9 4.2 4.6 4.8 5.2 20000 3.45 4.14 5.05 5.50 6.412132233.00 2.91 4.4 4.8 5.2 5.5 6.0 13043 3.39 4.30 5.20 5.89 7.022122233.00 2.71 4.4 4.8 5.2 5.5 6.0 13043 3.84 4.75 5.66 6.34 7.482112233.00 2.52 4.4 4.7 5.1 5.4 5.8 13953 4.27 4.95 5.86 6.55 7.452132133.00 2.82 4.5 4.9 5.3 5.6 6.1 12245 3.82 4.73 5.64 6.32 7.452122133.00 2.59 4.5 4.9 5.3 5.5 6.0 12500 4.34 5.25 6.16 6.61 7.752112133.00 2.36 4.4 4.7 5.1 5.4 5.8 13953 4.64 5.32 6.23 6.91 7.822132232.00 2.87 5.2 5.6 6.0 6.3 6.9 8000 5.30 6.20 7.11 7.80 9.162122232.00 2.70 5.2 5.7 6.1 6.4 6.9 7792 5.68 6.82 7.73 8.41 9.552112232.00 2.52 5.2 5.6 6.0 6.3 6.9 8000 6.09 7.00 7.91 8.59 9.952132132.00 2.79 5.2 5.7 6.1 6.4 6.9 7692 5.48 6.61 7.52 8.20 9.342122132.00 2.56 5.2 5.7 6.1 6.4 7.0 7595 6.00 7.14 8.05 8.73 10.092112132.00 2.35 5.2 5.6 6.1 6.3 6.9 7895 6.48 7.39 8.52 8.98 10.342132231.00 2.84 5.7 6.2 6.6 6.9 7.5 5769 6.50 7.64 8.55 9.23 10.592122231.00 2.67 5.7 6.2 6.7 7.0 7.6 5607 6.89 8.02 9.16 9.84 11.202112231.00 2.52 5.7 6.2 6.7 7.0 7.6 5660 7.23 8.36 9.50 10.18 11.552132131.00 2.76 5.7 6.2 6.7 7.0 7.6 5607 6.68 7.82 8.95 9.64 11.002122131.00 2.54 5.8 6.3 6.8 7.0 7.6 5455 7.41 8.55 9.68 10.14 11.502112131.00 2.33 5.8 6.2 6.7 7.0 7.6 5556 _ 7.89 8.80 9.93 10.61 11.98
AASHTO: 4" AC 12" BASE Overlay Thickness Data
6" AC 8' BASEAASHTOSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991133214.00 3.15 4.8 5.2 5.7 5.9 6.4 10000 3.75 4.66 5.80 6.25 7.391123214.00 3.08 4.8 5.2 5.7 5.9 6.4 10000 3.91 4.82 5.95 6.41 7.551113214.00 2.78 4.8 5.2 5.6 5.9 6.4 10345 4.59 5.50 6.41 ' 7.09 8.231133114.00 3.10 4.8 5.3 5.7 5.9 6.5 9836 3.86 5.00 5.91 6.36 7.731123114.00 2.96 4.8 5.3 5.7 5.9 6.4 10000 4.18 5.32 6.23 6.68 7.821113114.00 2.65 4.8 5.2 5.6 5.9 6.4 10345 4.89 5.80 6.70 7.39 8.521133213.00 3.04 5.5 6.0 6.4 6.7 7.3 6452 5.59 6.73 7.64 8.32 9.681123213.00 3.02 5.5 6.0 '6.5 6.8 7.3 6316 5.64 6.77 7.91 8.59 9.731113213.00 2.81 5.5 6.0 6.5 6.8 7.3 6316 6.11 7.25 8.39 9.07 10.201133113.00 2.99 5.5 6.0 6.5 6.7 7.3 6383 5.70 6.84 7.98 8.43 9.801123113.00 2.91 5.5 6.0 6.5 6.8 7.3 6316 5.89 7.02 8.16 8.84 9.981113113.00 2.66 5.5 6.0 6.5 6.7 7.3 6383 6.45 7.59 8.73 9.18 10.551133212.00 2.76 7.0 7.5 8.1 8.5 9.1 2857 9.64 10.77 12.14 13.05 14.411123212.00 2.85 7.1 7.7 8.2 8.6 9.3 2703 9.66 11.02 12.16 13.07 14.661113212.00 2.81 7.2 7.8 8.3 8.7 9.4 2586 9.98 11.34 12.48 13.39 14.981133112.00 2.72 7.0 7.6 8.1 8.5 9.2 2817 9.73 11.09 12.23 13.14 14.731123112.00 2.77 7.1 7.7 8.3 8.6 9.3 2655 9.84 11.20 12.57 13.25 14.841113112.00 2.67 7.2 7.8 8.4 8.7 9.4 2564 10.30 11.66 13.02 13.70 15.301133211.00 2.23 9.0 9.7 10.4 10.8 11.7 1170 15.39 16.98 18.57 19.48 21.521123211.00 2.45 9.2 9.9 10.6 11.1 12.0 1062 15.34 16.93 18.52 19.66 21.701113211.00 2.64 9.4 10.2 10.9 11.4 12.3 965 15.36 17.18 18.77 19.91 21.951133111.00 2.21 9.0 9.7 10.4 10.9 11.7 1143 15.43 17.02 18.61 19.75 21.571123111.00 2.41 9.3 10.0 10.7 11.2 12.1 1031 15.66 17.25 18.84 19.98 22.021113111.00 2.53 9.5 10.3 11.0 11.5 12.4 940 15.84 17.66 19.25 20.39 22.432133214.00 3.35 4.0 4.4 4.8 5.0 5.4 17647 1.48 2.39 3.30 3.75 4.662123214.00 2.95 4.0 4.4 4.8 5.0 5.4 17647 2.39 3.30 4.20 4.66 5.572113214.00 2.43 3.9 4.3 4.6 4.9 5.3 19355 3.34 4.25 4.93 5.61 6.522133114.00 3.26 4.1 4.5 4.8 5.0 5.5 17143 1.91 2.82 3.50 3.95 5.092123114.00 2.89 4.1 4.5 4.9 5.1 5.5 16667 2.75 3.66 4.57 5.02 5.932113114.00 2.34 4.0 4.3 4.7 4.9 5.3 18750 3.77 4.45 5.36 5.82 6.732133213.00 3.29 4.4 4.8 5.2 5.4 5.9 13333 2.52 3.43 4.34 4.80 5.932123213.00 2.95 4.4 4.8 5.2 5.5 6.0 13043 3.30 4.20 5.11 5.80 6.932113213.00 2.44 4.4 4.8 5.2 5.4 5.9 13636 4.45 5.36 6.27 6.73 7.862133113.00 3.28 4.5 4.9 5.3 5.5 6.0 12766 2.77 3.68 4.59 5.05 6.182123113.00 2.88 4.5 4.9 5.3 5.5 6.0 12500 3.68 4.59 5.50 5.95 7.092113113.00 2.32 4.4 4.8 5.2 5.4 5.9 13636 4.73 5.64 6.55 ' 7.00 8.142133212.00 3.28 5.1 5.6 6.0 6.3 6.8 8219 4.14 5.27 6.18 6.86 8.002123212.00 2.95 5.2 5.7 6.1 6.4 6.9 7792 5.11 6.25 7.16 7.84 8.982113212.00 2.44 5.2 5.6 6.1 6.3 6.9 7895 6.27 7.18 8.32 8.77 10.142133112.00 3.24 5.2 5.6 6.0 6.3 6.9 8000 4.45 5.36 6.27 6.95 8.322123112.00 2.88 5.2 5.7 6.1 6.4 7.0 7595 5.27 6.41 7.32 8.00 9.362113112.00 2.32 5.2 5.7 6.1 6.4 6.9 7792 6.55 7.68 8.59 9.27 10.412133211.00 3.21 5.6 6.1 6.6 6.9 7.5 5941 5.43 6.57 7.70 8.39 9.752123211.00 2.93 5.7 6.2 6.7 7.0 7.6 5660 6.30 7.43 8.57 9.25 10.612113211.00 2.46 5.8 6.2 6.7 7.0 7.6 5556 7.59 8.50 9.64 10.32 11.682133111.00 3.18 5.7 6.2 6.6 6.9 7.5 5825 5.73 6.86 7.77 8.45 9.822123111.00 2.85 5.8 6.2 6.7 7.0 7.6 5556 6.70 7.61 8.75 9.43 10.802113111.00 2.33 5.8 6.3 6.8 7.0 7.6 5455 _ 7.89 9.02 10.16 10.61 11.98
AASHTO: 6" AC 8" BASE Overlay Thickness Data
6' AC 10' BASEAASHTOSTATION
S NeffSNf
RELIABILITY LEVEL50 75 90 95 99
Mr(psi)
OVERLAY THICKNESS (in)RELIABILITY LEVEL
50 75 90 95 991133224.00 3.44 4.8 5.2 5.6 5.9 6.4 10169 3.09 4.00 4.91 5.59 6.731123224.00 3.39 4.8 5.2 5.6 5.9 6.4 10169 3.20 4.11 5.02 5.70 6.841113224.00 3.13 4.8 5.2 5.6 5.9 6.4 10345 3.80 4.70 5.61 6.30 7.431133124.00 3.38 4.8 5.2 5.7 5.9 6.4 10000 3.23 4.14 5.27 5.73 6.861123124.00 3.25 4.8 5.2 5.6 5.9 6.4 10169 3.52 4.43 5.34 6.02 7.161113124.00 2.96 4.8 5.2 5.6 5.9 6.4 10345 4.18 5.09 6.00 6.68 7.821133223.00 3.32 5.5 5.9 6.4 6.7 7.2 6593 4.95 5.86 7.00 7.68 8.821123223.00 3.32 5.5 6.0 6.4 6.7 7.3 6452 4.95 6.09 7.00 7.68 9.051113223.00 3.14 5.5 6.0 6.4 6.7 7.3 6452 5.36 6.50 7.41 8.09 9.451133123.00 3.24 5.5 6.0 6.4 6.7 7.3 6522 5.14 6.27 7.18 7.86 9.231123123.00 3.20 5.5 6.0 6.5 6,7 7.3 6383 5.23 6.36 7.50 7.95 9.321113123.00 2.97 5.5 6.0 6.4 6.7 7.3 6452 5.75 6.89 7.80 8.48 9.841133222.00 2.95 6.9 7.5 8.0 8.4 9.0 2970 8.98 10.34 11.48 12.39 13.751123222.00 3.10 7.0 7.6 8.1 8.5 9.2 2817 8.86 10.23 11.36 12.27 13.861113222.00 3.11 7.1 7.7 8.3 8.6 9.3 2679 9.07 10.43 11.80 12.48 14.071133122.00 2.90 6.9 7.5 8.1 8.4 9.1 2913 9.09 10.45 11.82 12.50 14.091123122.00 3.00 7.0 7.6 8.2 8.5 9.2 2752 9.09 10.45 11.82 12.50 14.091113122.00 2.95 7.1 7.7 8.3 8.6 9.3 2643 9.43 10.80 12.16 12.84 14.431133221.00 2.37 8.8 9.5 10.2 10.6 11.5 1232 14.61 16.20 17.80 18.70 20.751123221.00 2.61 9.0 9.8 10.5 10.9 11.8 1134 14.52 16.34 17.93 18.84 20.891113221.00 2.84 9.3 10.0 10.7 11.2 12.1 1031 14.68 16.27 17.86 19.00 21.051133121.00 2.35 8.9 9.6 10.3 10.7 11.6 1195 14.89 16.48 18.07 18.98 21.021123121.00 2.56 9.1 9.9 10.6 11.0 11.9 1093 14.86 16.68 18.27 19.18 21.231113121.00 2.74 9.3 10.1 10.8 11.3 12.2 1000 14.91 16.73 18.32 19.45 21.502133224.00 3.62 4.0 4.4 4.8 5.0 5.4 17647 0.86 1.77 2.68 3.14 4.052123224.00 3.24 4.0 4.4 4.8 5.0 5.4 17647 1.73 2.64 3.55 4.00 4.912113224.00 2.73 3.9 4.3 4.6 4.9 5.3 19355 2.66 3.57 4.25 4.93 5.842133124.00 3.56 4.1 4.5 4.9 5.1 5.5 16667 1.23 2.14 3.05 3.50 4.412123124.00 3.15 4.1 4.5 4.9 5.1 5.5 16667 2.16 3.07 3.98 4.43 5.342113124.00 2.61 4.0 4.3 4.7 4.9 5.3 18750 3.16 3.84 4.75 5.20 6.112133223.00 3.60 4.4 4.8 5.2 5.4 5.9 13333 1.82 2.73 3.64 4.09 5.232123223.00 3.23 4.4 4.8 5.2 5.5 6.0 13043 2.66 3.57 4.48 5.16 6.302113223.00 2.74 4.4 4.8 5.2 5.4 5.9 13636 3.77 4.68 5.59 6.05 7.182133123.00 3.51 4.5 4.9 5.3 5.5 6.0 12766 2.25 3.16 4.07 4.52 5.662123123.00 3.14 4.5 4.9 5.3 5.6 6.1 12245 3.09 4.00 4.91 5.59 6.732113123.00 2.60 4.4 4.8 5.2 5.4 5.9 13333 4.09 5.00 5.91 6.36 7.502133222.00 3.51 5.1 5.6 6.0 6.3 6.8 8219 3.61 4.75 5.66 6.34 7.482123222.00 3.19 5.2 5.6 6.1 6.3 6.9 7895 4.57 5.48 6.61 7.07 8.432113222.00 2.74 5.2 5.6 6.1 6.3 6.9 7895 5.59 6.50 7.64 8.09 9.452133122.00 3.46 5.2 5.6 6.0 6.3 6.9 8000 3.95 4.86 5.77 6.45 7.822123122.00 3.11 5.2 5.7 6.1 6.4 7.0 7595 4.75 5.89 6.80 7.48 8.842113122.00 2.59 5.2 5.7 6.1 6.4 6.9 7792 5.93 7.07 7.98 8.66 9.802133221.00 3.44 5.6 6.1 6.6 6.9 7.5 5941 4.91 6.05 7.18 7.86 9.232123221.00 3.17 5.7 6.2 6.7 7.0 7.6 5660 5.75 6.89 8.02 8.70 10.072113221.00 2.74 5.7 6.2 6.7 7.0 7.6 5607 6.73 7.86 9.00 9.68 11.052133121.00 3.38 5.7 6.2 6.6 6.9 7.5 5825 5.27 6.41 7.32 8.00 9.362123121.00 3.08 5.8 6.3 6.7 7.0 7.6 5505 6.18 7.32 8.23 8.91 10.272113121.00 2.59 _ 5.8 6.3 6.8 7.0 7.6 _ 5455 _ 7.30 8.43 9.57 10.02 11.39
AASIITO: 6" AC 10" BASE Overlay Thickness Data
6' AC 12" BASEAASHTOSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi)
OVERLAY THICKNESS (in)RELIABILITY LEVEL
50 75 90 95 99 .-1133234.00 3.77 4.8 5.2 5.6 5.9 6.4 10345 2.34 3.25 4.16 4.84 5.98
1123234.00 3.72 4.8 5.2 5.6 5.9 6.4 10345 2.45 3.36 4.27 4.95 6.091113234 .00 3.47 4.8 5.2 5.6 5.9 6.4 10345 3.02 3.93 4.84 5.52 6.661133134.00 3.68 4.8 5.2 5.6 5.9 6.4 10169 2.55 3.45 4.36 5.05 6.181123134.00 3.58 4.8 5.2 5.6 5.9 6.4 10169 2.77 3.68 4.59 5.27 6.411113134.00 3.28 4.8 5.2 5.6 5.9 6.4 10345 3.45 4.36 5.27 5.95 7.091133233.00 3.61 5.4 5.9 6.4 6.6 7.2 6742 4.07 5.20 6.34 6.80 8.161123233.00 3.62 5.4 5.9 6.4. 6.7 7.2 6667 4.05 5.18 6.32 7.00 8.141113233.00 3.47 5.5 6.0 6.4 6.7 7.3 6522 4.61 5.75 6.66 7.34 8.701133133.00 3.50 5.4 5.9 6.4 6.7 7.2 6667 4.32 5.45 6.59 7.27 8.411123133.00 3.48 5.5 6.0 6.4 6.7 7.3 6522 4.59 5.73 6.64 7.32 8.681113133.00 3.28 5.5 6.0 6.4 6.7 7.3 6522 5.05 6.18 7.09 7.77 9.141133232.00 3.17 6.8 7.4 7.9 8.3 8.9 3109 8.25 9.61 10.75 11.66 13.021123232.00 3.33 6.9 7.5 8.0 8.4 9.1 2956 8.11 9.48 10.61 11.52 13.111113232.00 3.39 7.0 7.6 8.2 8.5 9.2 2791 8.20 9.57 10.93 11.61 13.201133132.00 3.12 6.9 7.4 8.0 8.3 9.0 3015 8.59 9.73 11.09 11.77 13.361123132.00 3.23 7.0 7.5 8.1 8.4 9.1 2871 8.57 9.70 11.07 11.75 13.341113132.00 3.23 7.1 7.6 8.2 8.6 9.3 2740 8.80 9.93 11.30 12.20 13.801133231.00 2.53 8.7 9.4 10.1 10.5 11.3 1302 14.02 15.61 17.20 18.11 19.931123231.00 2.78 8.9 9.6 10.3 10.7 11.6 1212 13.91 15.50 17.09 18.00 20.051113231.00 3.03 9.1 9.8 10.5 11.0 11.8 1103 13.80 15.39 16.98 18.11 19.931133131.00 2.50 8.8 9.5 10.2 10.6 11.4 1253 14.32 15.91 17.50 18.41 20.231123131.00 2.72 9.0 9.7 10.4 10.8 11.7 1161 14.27 15.86 17.45 18.36 20.411113131.00 2.93 9.2 9.9 10.6 11.1 12.0 1064 14.25 15.84 17.43 18.57 20.612133234.00 3.93 4.0 4.4 4.8 5.0 5.4 17647 0.16 1.07 1.98 2.43 3.342123234 .00 3.56 4.1 4.5 4.8 5.0 5.5 17143 1.23 2.14 2.82 3.27 4.412113234.00 3.06 4.0 4.3 4.7 4.9 5.3 18750 2.14 2.82 3.73 4.18 5.092133134.00 3.85 4.2 4.5 4.9 5.1 5.6 16216 0.80 1.48 2.39 2.84 3.982123134.00 3.44 4.2 4.5 4.9 5.1 5.6 16216 1.73 2.41 3.32 3.77 4.912113134.00 2.90 4.0 4.4 4.7 5.0 5.4 18182 2.50 3.41 4.09 4.77 5.682133233 .00 3.89 4.4 4.8 5.2 5.4 5.9 13333 1.16 2.07 2.98 3.43 4.572123233.00 3.52 4.4 4.8 5.2 5.5 6.0 13043 2.00 2.91 3.82 4.50 5.642113233.00 3.04 4.4 4.8 5.2 5.4 5.9 13636 3.09 4.00 4.91 5.36 6.502133133 .00 3.79 4.5 4.9 5.3 5.5 6.0 12500 1.61 2.52 3.43 3.89 5.022123133.00 3.41 4.5 4.9 5.3 5.6 6.1 12245 2.48 3.39 4.30 4.98 6.112113133.00 2.89 4.4 4.8 5.2 5.5 6.0 13043 3.43 4.34 5.25 5.93 7.07
- 2133232.00 3.77 5.1 5.6 6.0 6.3 6.8 8219 3.02 4.16 5.07 5.75 6.892123232.00 3.47 5.2 5.6 6.1 6.3 6.9 7895 3.93 4.84 5.98 6.43 7.802113232 .00 3.02 5.2 5.6 6.0 6.3 6.9 8000 4.95 5.86 6.77 7.45 8.822133132.00 3.70 5.2 5.6 6.0 6.3 6.9 8000 3.41 4.32 5.23 5.91 7.27
2123132.00 3.35 5.2 5.7 6.1 6.4 7.0 7595 4.20 5.34 6.25 6.93 8.302113132 .00 2.86 5.2 5.7 6.1 6.4 6.9 7692 5.32 6.45 7.36 8.05 9.18
2133231.00 3.72 5.7 6.2 6.6 6.9 7.5 5769 4.50 5.64 6.55 7.23 8.59
2123231.00 3.42 5.7 6.2 6.7 7.0 7.5 5714 5.18 6.32 7.45 8.14 9.272113231.00 3.02 5.7 6.2 6.7 7.0 7.6 5660 6.09 7.23 8.36 9.05 10.41
2133131.00 3.61 5.7 6.2 6.6 6.9 7.5 5825 4.75 5.89 6.80 7.48 8.84
2123131.00 3.30 5.8 6.2 6.7 7.0 7.6 5556 5.68 6.59 7.73 8.41 9.77
2113131.00 2.84 _ 5.8 6.3 6.7 7.0 7.6 5505 _ 6.73 7.86 8.77 9.45 10.82
AASHTO: 6" AC 12" BASE Overlay Thickness Data
8" AC 8" BASEAASHTOSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991134214.00 3.96 4.8 5.2 5.6 5.9 6.4 10345 1.91 2.82 3.73 4.41 5.551124214.00 3.77 4.8 5.2 5.6 5.9 6.4 10169 2.34 3.25 4.16 4.84 5.981114214.00 3.29 4.8 5.2 5.6 5.9 6.4 10169 3.43 4.34 5.25 5.93 7.071134114.00 3.87 4.8 5.2 5.6 5.9 6.4 10345 2.11 3.02 3.93 4.61 5.751124114 .00 3.70 4.8 5.2 5.7 5.9 6.4 10000 2.50 3.41 4.55 5.00 6.141114114.00 3.14 4.8 5.2 5.6 5.9 6.4 10345 3.77 4.68 5.59 6.27 7.411134213.00 3.75 5.4 5.9 6.3 6.6 7.1 6897 3.75 4.89 5.80 6.48 7.611124213.00 3.67 5.5 6.0 6.4 6.7 7.3 6522 4.16 5.30 6.20 6.89 8.251114213.00 3.28 5.5 6.0 6.5 6.7 7.3 6383 5.05 6.18 7.32 7.77 9.141134113.00 3.70 5.4 5.9 6.3 6.6 7.2 6818 3.86 5.00 5.91 6.59 7.951124113.00 3.60 5.5 6.0 6.4 6.7 7.3 6452 4.32 * 5.45 6.36 7.05 8.411114113.00 3.16 5.5 6.0 6.5 6.7 7.3 6383 5.32 6.45 7.59 8.05 9,411134212.00 3.20 6.7 7.3 7.8 8.2 8.9 3209 7.95 9.32 10.45 11.36 12.951124212.00 3.34 6.9 7.5 8.1 8.4 9.1 2899 8.09 9.45 10.82 11.50 13.091114212.00 3.23 7.1 7.7 8.3 8.6 9.3 2679 8.80 10.16 11.52 12.20 13.801134112.00 3.18 6.8 7.3 7.9 • 8.2 . 8.9 3158 8.23 9.36 10.73 11.41 13.001124112.00 3.29 7.0 7.6 8.1 8.5 9.2 2844 8.43 9.80 10.93 11.84 13.431114112.00 3.10 7.1 7.7 8.3 8.6 9.3 2643 9.09 10.45 11.82 12.50 14.091134211.00 2.49 8.6 9.3 9.9 10.4 11.2 1364 13.89 15.48 16.84 17.98 19.801124211.00 2.72 8.9 9.6 10.3 10.8 11.6 1186 14.05 15.64 17.23 18.36 20.181114211.00 2.90 9.3 10.0 10.7 11.2 12.1 1034 14.55 16.14 17.73 18.86 20.911134111.00 2.47 8.6 9.3 10.0 10.4 11.2 1339 13.93 15.52 17.11 18.02 19.841124111.00 2.70 9.0 9.7 10.4 10.8 11.7 1156 14.32 15.91 17.50 18.41 20.451114111.00 2.83 9.3 10.1 10.8 11.3 12.1 1005 14.70 16.52 18.11 19.25 21.072134214.00 4.30 4.0 4.4 4.7 5.0 5.4 18182 0.00 0.23 0.91 1.59 2.502124214.00 3.78 4.0 4.4 4.8 5.0 5.4 17647 0.50 1.41 2.32 2.77 3.682114214.00 2.97 4.0 4.3 4.7 4.9 5.3 18750 2.34 3.02 3.93 4.39 5.302134114.00 4.20 4.0 4.4 4.8 5.0 5.4 17647 0.00 0.45 1.36 1.82 2.732124114.00 3.73 4.1 4.5 4.9 5.1 5.5 16667 0.84 1.75 2.66 3.11 4.022114114.00 2.88 4.0 4.4 4.7 5.0 5.4 18182 2.55 3.45 4.14 4.82 5.732134213.00 4.18 4.4 4.7 5.1 5.4 5.8 13953 0.50 1.18 2.09 2.77 3.682124213.00 3.77 4.4 4.8 5.2 5.5 6.0 13043 1.43 2.34 3.25 3.93 5.072114213.00 2.98 4.4 4.8 5.2 5.4 5.9 13333 3.23 4.14 5.05 5.50 6.642134113.00 4.16 4.4 4.8 5.2 5.4 5.9 13333 0.55 1.45 2.36 2.82 3.952124113.00 3.67 4.5 4.9 5.3 5.5 6.0 12766 1.89 2.80 3.70 4.16 5.302114113.00 2.87 4.4 4.8 5.2 5.5 6.0 13043 3.48 4.39 5.30 ' 5.98 7.11
- 2134212.00 4.06 5.1 5.5 5.9 6.2 6.7 8451 2.36 3.27 4.18 4.86 6.002124212.00 3.73 5.1 5.6 6.0 6.3 6.8 8108 3.11 4.25 5.16 5.84 6.982114212.00 2.99 5.2 5.6 6.1 6.3 6.9 7895 5.02 5.93 7.07 7.52 8.892134112.00 4.04 5.1 5.5 6.0 6.2 6.8 8333 2.41 3.32 4.45 4.91 6.272124112.00 3.65 5.2 5.6 6.1 6.3 6.9 7895 3.52 4.43 5.57 6.02 7.392114112.00 2.88 5.2 5.7 6.1 6.4 6.9 7692 5.27 6.41 7.32 8.00 9.142134211.00 3.91 5.6 6.1 6.5 6.8 7.4 6122 3.84 4.98 5.89 6.57 7.932124211.00 3.67 5.7 6.2 6.6 6.9 7.5 5825 4.61 5.75 6.66 7.34 8.702114211.00 3.01 5.8 6.2 6.7 7.0 7.6 5556 6.34 7.25 8.39 9.07 10.432134111.00 3.91 5.6 6.1 6.6 6.9 7.4 6000 3.84 4.98 6.11 6.80 7.932124111.00 3.61 5.7 6.2 6.7 7.0 7.5 5714 4.75 5.89 7.02 7.70 8.842114111.00 2.89 _ 5.8 6.3 6.8 7.0 7.6 5455 _ 6.61 7.75 8.89 9.34 10.70
AASHTO: 8" AC 8" BASE Overlay Thickness Data
8" AC 10' BASEAASHTOSTATION
S Neff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991134224 .00 4.24 4.7 5.2 5.6 5.8 6.3 10526 1.05 2.18 3.09 3.55 4.681124224.00 4.09 4.8 5.2 5.6 5.9 6.4 10345 1.61 2.52 3.43 4.11 5.251114224.00 3.62 4.8 5.2 5.6 5.9 6.4 10345 2.68 3.59 4.50 5.18 6.321134124.00 4.20 4.8 5.2 5.6 5.9 6.4 10345 1.36 2.27 3.18 3.86 5.001124124.00 4.00 4.8 5.2 5.6 5.9 6.4 10169 1.82 2.73 3.64 4.32 5.451114124.00 3.47 4.8 5.2 5.6 5.9 6.4 10345 3.02 3.93 4.84 5.52 6.661134223.00 3.99 5.4 5.8 6.3 6.5 7.1 7059 3.20 4.11 5.25 5.70 7.071124223.00 3.97 5.4 5.9 6.4 6.7 7.2 6667 3.25 4.39 5.52 6.20 7.341114223.00 3.61 5.5 6.0 6.4 6.7 7.3 6522 4.30 5.43 6.34 7.02 8.391134123.00 3.97 5.4 5.9 6.3 6.6 7.2 6897 3.25 4.39 5.30 5.98 7.341124123.00 3.88 5.5 5.9 6.4 6.7 7.2 6593 3.68 4.59 5.73 6.41 7.551114123.00 3.46 5.5 6.0 6.4 6.7 7.3 6452 4.64 5.77 6.68 7.36 8.731134222.00 3.40 6.7 7.2 7.8 8.1 8.8 3315 7.50 8.64 10.00 10.68 12.271124222.00 3.57 6.9 7.4 8.0 8.3 9.0 3015 7.57 8.70 10.07 10.75 12.341114222.00 3.50 7.0 7.6 8.2 8.5 9.2 2791 7.95 9.32 10.68 11.36 12.951134122.00 3.37 6.7 7.3 7.8 8.2 8.8 3243 7.57 8.93 10.07 10.98 12.341124122.00 3.51 6.9 7.5 8.0 8.4 9.1 2941 7.70 9.07 10.20 11.11 12.701114122.00 3.37 7.1 7.6 8.2 8.6 9.3 2740 8.48 9.61 10.98 11.89 13.481134221.00 2.65 8.5 9.2 9.8 10.3 11.1 1415 13.30 14.89 16.25 17.39 19.201124221.00 2.88 8.8 9.5 10.2 10.6 11.4 1253 13.45 15.05 16.64 17.55 19.361114221.00 3.09 9.1 9.8 10.5 11.0 11.8 1105 13.66 15.25 16.84 17.98 19.801134121.00 2.63 8.6 9.2 9.9 10.3 11.2 1382 13.57 14.93 16.52 17.43 19.481124121.00 2.85 8.9 9.6 10.3 10.7 11.6 1212 13.75 15.34 16.93 17.84 19.891114121.00 3.01 92 9.9 10.6 11.1 11.9 1068 14.07 15.66 17.25 18.39 20.202134224.00 4.58 4.0 4.4 4.7 5.0 5.4 18182 0.00 0.00 0.27 0.95 1.862124224.00 4.09 4.0 4.4 4.8 5.0 5.4 17647 0.00 0.70 1.61 2.07 2.982114224.00 3.30 4.0 4.4 4.7 5.0 5.4 18182 1.59 2.50 3.18 3.86 4.772134124.00 4.52 4.1 4.5 4.8 5.0 5.5 17143 0.00 0.00 0.64 1.09 2.232124124.00 3.99 4.1 4.5 4.9 5.1 5.5 16667 0.25 1.16 2.07 2.52 3.432114124.00 3.17 4.0 4.4 4.8 5.0 5.4 17647 1.89 2.80 3.70 4.16 5.072134223.00 4.47 4.4 4.7 5.1 5.4 5.8 13953 0.00 0.52 1.43 2.11 3.022124223.00 4.07 4.4 4.8 5.2 5.5 6.0 13043 0.75 1.66 2.57 3.25 4.392114223.00 3.29 4.4 4.8 5.2 5.4 5.9 13333 2.52 3.43 4.34 4.80 5.932134123.00 4.45 4.4 4.8 5.2 5.4 5.9 13333 0.00 0.80 1.70 2.16 3.302124123.00 3.96 4.5 4.9 5.3 5.5 6.0 12500 1.23 2.14 3.05 3.50 4.642114123.00 3.17 4.5 4.9 5.3 5.5 6.0 12766 3.02 3.93 4.84 5.30 6.43
- 2134222.00 4.30 5.1 5.5 5.9 6.2 6.7 8571 1.82 2.73 3.64 4.32 5.452124222.00 3.98 5.1 5.6 6.0 6.3 6.8 8108 2.55 3.68 4.59 5.27 6.412114222.00 3.29 5.2 5.6 6.1 6.3 6.9 7895 4.34 5.25 6.39 6.84 8.202134122.00 4.26 5.1 5.5 6.0 6.2 6.8 8333 1.91 2.82 3.95 4.41 5.772124122.00 3.90 5.2 5.6 6.1 6.3 6.9 7895 2.95 3.86 5.00 5.45 6.822114122.00 3.14 5.2 5.7 6.1 6.4 6.9 7692 4.68 5.82 6.73 7.41 8.552134221.00 4.16 5.6 6.1 6.5 6.8 7.4 6122 3.27 4.41 5.32 6.00 7.362124221.00 3.91 5.7 6.1 6.6 6.9 7.5 5882 4.07 4.98 6.11 6.80 8.162114221.00 3.28 5.7 6.2 6.7 7.0 7.6 5660 5.50 6.64 7.77 8.45 9.822134121.00 4.12 5.6 6.1 6.6 6.9 7.4 6000 3.36 4.50 5.64 6.32 7.45
2124121.00 3.84 5.7 6.2 6.7 7.0 7.5 5714 4.23 5.36 6.50 7.18 8.32
2114121.00 _ 3.14 5.8 6.3 6.8 7.0 7.6 5455 6.05 7.18 8.32 8.77 10.14
AASHTO: 8" AC 10" BASE Overlay Thickness Data
8' AC 12' BASEAASHTOSTATION
SNeff50
SNfRELIABILITY LEVEL
75 90 95 99Mr
(psi) 50
OVERLAY THICKNESS (in)RELIABILITY LEVEL
75 90 95 991134234.00 4.57 4.7 5.1 5.5 5.8 6.3 10714 0.30 1.20 2.11 2.80 3.931124234.00 4.43 4.7 5.2 5.6 5.8 6.3 10526 0.61 1.75 2.66 3.11 4.251114234.00 3.96 4.7 5.2 5.6 5.8 6.3 10526 1.68 2.82 3.73 4.18 5.321134134.00 4.50 4.7 5.2 5.6 5.8 6.3 10526 0.45 1.59 2.50 2.95 4.091124134.00 4.31 4.8 5.2 5.6 5.9 6.4 10345 1.11 2.02 2.93 3.61 4.751114134.00 3.81 4.8 5.2 5.6 5.9 6.4 10345 2.25 3.16 4.07 4.75 5.891134233.00 4.27 5.3 5.8 6.2 6.5 7.1 7229 2.34 3.48 4.39 5.07 6.431124233.00 4.27 5.4 5.9 6:3 6.6 7.1 6897 2.57 3.70 4.61 5.30 6.431114233.00 3.94 5.4 5.9 6.4 6.7 7.2 6667 3.32 4.45 5.59 6.27 7.411134133.00 4.22 5.4 5.8 6.3 6.5 7.1 7059 2.68 3.59 4.73 5.18 6.551124133.00 4.17 5.4 5.9 6.4 6.6 7.2 6742 2.80 3.93 5.07 5.52 6.891114133.00 3.78 5.5 5.9 6.4 6.7 7.2 6593 3.91 4.82 5.95 6.64 7.771134232.00 3.61 6.6 7.2 7.7 8.0 8.7 3429 6.80 8.16 9.30 9.98 11.571124232.00 3.80 6.8 7.3 7.9 8.2 8.9 3158 6.82 7.95 9.32 10.00 11.591114232.00 3.78 6.9 7.5 8.1 8.4 9.1 2913 7.09 8.45 9.82 10.50 12.091134132.00 3.59 6.7 7.2 7.8 8.1 8.8 3333 7.07 8.20 9.57 10.25 11.841124132.00 3.73 6.8 7.4 7.9 8.3 9.0 3061 6.98 8.34 9.48 10.39 11.981114132.00 3.64 7.0 7.6 8.1 8.5 9.2 2844 7.64 9.00 10.14 11.05 12.641134231.00 2.84 8.4 9.1 9.7 10.1 10.9 1478 12.64 14.23 15.59 16.50 18.321124231.00 3.06 8.6 9.3 10.0 10.4 11.3 1327 12.59 14.18 15.77 16.68 18.731114231.00 3.28 8.9 9.7 10.3 10.8 11.6 1179 12.77 14.59 15.95 17.09 18.911134131.00 2.80 8.5 9.2 9.8 10.2 11.0 1432 12.95 14.55 15.91 16.82 18.641124131.00 3.02 8.7 9.4 10.1 10.6 11.4 1274 12.91 14.50 16.09 17.23 19.051114131.00 3.20 9.0 9.8 10.5 10.9 11.8 1134 13.18 15.00 16.59 17.50 19.552134234.00 4.91 4.0 4.4 4.7 5.0 5.4 18182 0.00 0.00 0.00 0.20 1.112124234.00 4.41 4.0 4.4 4.8 5.0 5.4 17647 0.00 0.00 0.89 1.34 2.252114234.00 3.62 4.0 4.4 4.7 5.0 5.4 18182 0.86 1.77 2.45 3.14 4.052134134.00 4.82 4.1 4.5 4.8 5.0 5.5 17143 0.00 0.00 0.00 0.41 1.552124134.00 4.31 4.2 4.5 ' 4.9 5.1 5.6 16216 0.00 0.43 1.34 1.80 2.932114134.00 3.47 4.1 4.5 4.8 5.0 5.5 17143 1.43 2.34 3.02 3.48 4.612134233.00 4.81 4.4 4.8 5.2 5.4 5.9 13636 0.00 0.00 0.89 1.34 2.482124233.00 4.37 4.4 4.8 5.2 5.5 6.0 13043 0.07 0.98 1.89 2.57 3.702114233.00 3.60 4.4 4.8 5.2 5.4 5.9 13333 1.82 2.73 3.64 4.09 5.232134133.00 4.75 4.4 4.8 5.2 5.5 6.0 13043 0.00 0.11 1.02 1.70 2.842124133.00 4.25 4.5 4.9 5.3 5.5 6.0 12500 0.57 1.4.8 2.39 2.84 3.982114133.00 3.45 4.5 4.9 5.3 5.5 6.0 12766 2.39 3.30 4.20 4.66 5.80
- 2134232.00 4.56 5.1 5.5 5.9 6.2 6.7 8571 1.23 2.14 3.05 3.73 4.862124232.00 4.28 5.1 5.6 6.0 6.3 6.8 8108 1.86 3.00 3.91 4.59 5.732114232.00 3.57 5.2 5.6 6.0 6.3 6.9 8000 3.70 4.61 5.52 6.20 7.572134132.00 4.54 5.1 5.6 6.0 6.3 6.8 8219 1.27 2.41 3.32 4.00 5.142124132.00 4.17 5.2 5.7 6.1 6.4 6.9 7792 2.34 3.48 4.39 5.07 6.202114132.00 3.41 5.2 5.7 6.1 6.4 6.9 7692 4.07 5.20 6.11 6.80 7.932134231.00 4.41 5.6 6.1 6.5 6.8 7.4 6122 2.70 3.84 4.75 5.43 6.802124231.00 4.17 5.7 6.1 6.6 6.9 7.5 5882 3.48 4.39 5.52 6.20 7.572114231.00 3.56 5.7 6.2 6.7 7.0 7.5 5714 4.86 6.00 7.14 7.82 8.952134131.00 4.35 5.6 6.1 6.6 6.9 7.4 6000 2.84 3.98 5.11 5.80 6.932124131.00 4.08 5.7 6.2 6.7 7.0 7.5 5714 3.68 4.82 5.95 6.64 7.772114131.00 3.39 5.8 6.3 6.7 7.0 7.6 5505 5.48 6.61 7.52 8.20 9.57
AASHTO: 8" AC 12" BASE Overlay Thickness Data
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