CCE

Competence Center Engineering - Ludwigshafen

Standard Civil, Infrastructure & Master Planning - Basics Ladders for industrial structures

LU-S-CL 012 Page 1 of 15 Issue Feb 2002

This Standard supersedes

Works Standard 39-004 Edition

Published: Intranet Extranet For internal use only Technical Documentation and Standardization lu-s-cl_012_en.doc / 22.07.2004

2

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Contents Page

1 Scope 1

2 General 1

3 Dimensions, Terms 2

4 Design 3

5 Components 14

Standards and other documents referred to 14

Further standards and documents 15

Amendments 15

Dimensions in mm

1 Scope This Works Standard shall be applied to the design and fabrication of ladders.

For ladders on apparatus and vessels refer to WN 7-333 (LU-S-MC 258).

2 General Ladders designed for rising heights > 2.5 m to 5 m shall have a cage hoop, where practical. (refer to Fig. 1) Ladders designed for rising heights > 5 m must have a cage hoop. The rising height of a ladder with cage hoop must not exceed 10 m. For ladder heights > 10 m which require several ladders to be provided, intermediate landings shall be installed. (refer to Fig. 2) The cage hoop shall start at a height of 2 200 (in the area of ramps at 3 000) above floor. The ladder shall be attached by means of bolts at the locating point and the points of sliding rest. (refer to Figs. 9 through 11) Ladders for which the potential spacing for attachment is ≥ 3 500 shall have reinforced stiles.

a) Spacing ≤ 4 500 Pipe 60.3 x 3.6

b) Spacing > 4 500 to 10 000 Channel 100

For a) and b) in the exit area, however, reduction to 48.3 x 3.6.

Welds: Execution to DIN 18800-1

Corrosion protection: by hot-dip galvanizing to DIN EN ISO 1461

Fabrication tolerances: General tolerances for welded structures to DIN EN ISO 13920 Tolerance class A

LU-S-CL 012 EN Feb 2002 Page 2

3 Dimensions, Terms

FP = Locating point LP = Point of sliding rest

Figure 1: Ladder with side exit

Figure 2: Ladders > 5 000 to 10 000

risin

g he

ight

Exit

Pipe

Ø 4

8.3

x 3.

6

LU-S-CL 012 EN Feb 2002 Page 3

4 Design

Figure 3: Ladder end for side step

Figure 4: Cage hoop Figure 5: Cage hoop for side Stepp

Flat 30 x 12 Flat 30 x 12

Exit

LU-S-CL 012 EN Feb 2002 Page 4

Figure 6: Stile for exit to the front

Section X

Figure 7: Exit to steel platform Figure 8: Exit to reinforced-concrete platform

Tread

LU-S-CL 012 EN Feb 2002 Page 5

Ladder attachment configurations

Connection strap welded to structural component

Connecting angle bolted to structural component

Figure 9: Connectors for attachment of ladders

Figure 10: Locating point for ladder attachment

Figure 11: Vertical slotted ladder connection 2) Length of clip or angle depending on local conditions

LU-S-CL 012 EN Feb 2002 Page 6

View A

Standard safety gate = 700 wide (For landing depth < 1085 smaller safety gates are required.)

1) Single post with special end link

Figure 12: Side step with landing

(Basic dimension)

LU-S-CL 012 EN Feb 2002 Page 7

1) Single post with end link (refer to Fig. 12)

Figure 13: Ladder with intermediate landing and protective railing

LU-S-CL 012 EN Feb 2002 Page 8

Figure 14: Ladder with floor plate

Floor plate

Floor-plate detail

Mounting clips

Grating floor plate SP Design (Stamped and welded grating)

LU-S-CL 012 EN Feb 2002 Page 9

1) Single post with end link (refer to Fig. 12) 2) Design of floor plate (refer to Fig. 14)

Figure 15: Ladder with intermediate landing and gate

(Basic dimension)

Floor plate 1)

LU-S-CL 012 EN Feb 2002 Page 10

1) Single post with end link (refer to Fig. 12)

Figure 16: Ladder with intermediate landing, gate and protective railing

(Basic dimension)

LU-S-CL 012 EN Feb 2002 Page 11

1) Single post with end link (refer to Fig. 12) 2) Safety gate 600 wide

Figure 17: Ladder opening with pass-around, gate and protective railing

(Basic dimension)

LU-S-CL 012 EN Feb 2002 Page 12

Figure 18: View Z of Fig. 17 (ladder opening with pass-around)

Figure 19: Section B-B of Fig. 17 (ladder opening with pass-around)

LU-S-CL 012 EN Feb 2002 Page 13

Figure 20: Ladder with landing and railing or protective railing

< 16

00 w

ith p

rote

ctiv

e ra

iling

>

1600

with

raili

ng

LU-S-CL 012 EN Feb 2002 Page 14

5 Components

Table 1

Item No. Description Material

1 Stile Pipe 48.3 x 3.6 DIN 2448 or DIN 2458

St 37.0 DIN 1629 or DIN 1626

2 Ladder rung 1) Round 25 DIN 1013-1 S235JRG2 DIN EN 10025 3 End cap Cap 48.3 x 3.6 DIN 2617 S235JRG2 DIN EN 10025 4

Ladder

Cage hoop Flat 30 x 12 DIN 1017-1 S235JRG2 DIN EN 10025 5.1 Clip Flat 120 x 10 DIN 1017-1 S235JRG2 DIN EN 10025

5.2 Angle Flat 120 x 10 DIN 1017-1 or Angle DIN EN 10056-1

S235JRG2 DIN EN 10025 S235JRG2 DIN EN 10025

6 Ladder clip Flat 120 x 10 DIN 1017-1 S235JRG2 DIN EN 10025 Hex bolt M 16 x 45 Mu DIN 7990 4.6 DIN EN ISO 898-1

7 Washer A 18 DIN 7989-2 St Hex bolt M 16 x 45 DIN 7990 4.6 DIN EN ISO 898-1

8

Ladder connection

Cap nut M 16 DIN 1587 5 DIN EN ISO 898-1 9 Tread Grating SP 30 DIN 24537 S235JR DIN EN 10025 10 Toeboard Flat 130 x 10 DIN 1017-1 S235JRG2 DIN EN 10025 11 Support plate Plate DIN EN 10029 S235JRG2 DIN EN 10025 12

Floor plate

Support angle Angle 50 x 5 DIN EN 10056-1 S235JRG2 DIN EN 10025 1) Where special service conditions prevail, such as presence of oil or grease, additional precautions shall be taken in conformity with ASR to ensure slide-down protection, e.g. profiled tread or a suitable encasing.

Standards and other documents referred to ASR 20 German Workplace Regulations; Steps and ladders

DIN 1013-1 Steel bars; Hot rolled round steel for general purposes; Dimensions, permissible variations for dimension and form

DIN 1017-1 Steel bars; Hot rolled flat steel for general purposes; Dimensions, weights, permissible variations

DIN 1587 Hexagon domed cap nuts

DIN 1626 Welded circular pipes made of unalloyed steels for special requirements; Technical delivery conditions

DIN 1629 Seamless circular pipes made of unalloyed steels for special requirements; Technical delivery conditions

DIN 2448 Seamless steel pipes and tubes; Dimensions and conventional masses per unit length

DIN 2458 Welded steel pipes and tubes; Dimensions and conventional masses per unit length

DIN 2617 Steel butt-welding pipe fittings; Caps, dimensions

DIN 7989-2 Washers for use on structural steelwork; Part 2: Product grade A

DIN 7990 Steel heagon head bolts for structural steel bolting for supply with hexagon nuts

DIN 18800-1 Structural steelwork; Design and construction

DIN 24537 Gratings; Dimensions and loadbearing capacity

DIN EN 10025 Hot rolled products of non-alloy structural steels; Technical delivery conditions

DIN EN 10029 Hot rolled steel sheet and plate 3 mm thick or above; Tolerances on dimensions, shape and mass

DIN EN 10056-1 Structural steel equal and unequal leg angles; Part 1: Dimensions

LU-S-CL 012 EN Feb 2002 Page 15

DIN EN 20898-2 Mechanical properties of fasteners; Part 2: Nuts with coarse pitch thread and specified proof load values

DIN EN ISO 898-1 Mechanical properties of fasteners made of carbon steel and alloy steel; Part 1: Bolts

DIN EN ISO 1461 Hot dip galvanized coatings on fabricated iron and steel articles; Specifications and test methods

DIN EN ISO 13920 Welding; General tolerances for welded constructions; Lengths and angles; Shape and position (ISO 13920: 1996)

WN 7-333 Vertical ladders on equipment and vessels

LU-S-CL 013 Safety doors for industrial structures (WN 39-005)

Further standards and documents DIN 18799-1 Fixed ladders; Part 1: Ladders with two stiles – Safety requirements and verification

DIN 24532 Fixed vertical ladders of steel

LU-S-CL 011 Railing fabricated from steel for industrial structures (WN 39-003)

BGV D36 (VGB 74) German Accident Prevention Code "Ladders and steps"

Amendments The following amendments have been made to the July 1997 edition:

a) Editorially revised; b) In Fig. 6, Section X, altered dimensions on bent stile c) Included footnote in Table 1 “Ladder rung”