Nail Plates Guide

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A complete guide to the design, specification andinstallation of Pryda Nailplates

March 2012

Pryda Timber ConnectorsNailplates Guide


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ESSENTIAL NOTES PRYDA PRODUCT GUIDES

Copyright: Pryda Australia - A Division of ITW Australia ABN 63 004 235 063 - 2012

INTRODUCTION

The information in this Product Guide is provided for use inAustralia by architects, engineers, building designers, buildersand others. It is based upon the following criteria:

1. No Substitution: The products covered by or recommended inthis guide must not be substituted with other products.

2. Design Capacity Basis: See Codes & Standards following

3. Supporting Constructions: Constructions using Prydaproducts must be built in accordance with the BCA or anappropriate Australian standard. Note: This includesappropriate corrosion protection- See Corrosion Protectionfollowing

4. Correct Installation: Installation of Pryda products must be

strictly in accordance with the instructions in this guide

5. Current Guide Version Used: The current version of thisguide, including any amendments or additions, must be used.Users are advised to check with Pryda for updates at leastevery three months by telephone, the web site:www.pryda.com.auor by email to: [email protected].

CODES & STANDARDSProduct design capacities in this guide have been derived from:

(a) results of laboratory tests carried out by or for Pryda Australia

(b) engineering computations in accordance with the relevantAustralian standards, ie:

* AS1720.1-2010 Timber Structures. Part 1: Design Methods

* AS/NZS1170 series : 2002 Structural Design Actions

* AS4055 -2006 Wind Loads for Housing

Reference is also made to AS1684.1-1999 Residential TimberFramed Construction - Part 1: Design Criteria.

Design capacities tabulated in this guide apply directly forCategory 1 joints. For all other joints, reduce design capacitiesby using the factors as specified in General Notes (if applicable).Design capacities are related to the Joint Groupof the timber asdefined in AS1720 and AS1684. If the joint group of timbermembers joined together varies, the lower group must be

assumed for design, eg: JD5 is lower than JD4.

DEFINITIONS

Special terms used in this guide are as defined in Australianstandards, including:

Design Capacity: the maximum Limit State Design load (akaaction) which the product can safely support under the specifiedload condition, eg: 1.2G + 1.5Q (dead+roof live). See GeneralNotes for details (if applicable)

Joint Group: classification of a timber according to its fastener-holding capacity. See General Notes for details (if applicable)

CORROSION PROTECTION

Most Pryda products are manufactured using Z275 light-gaugesteel, having zinc coating of 275 gsm (total weight). Thisprotection is adequate only for INTERNAL applications in most

corrosion environments, except areas that are classified as heavyindustrial or those subject to high humidity (eg: enclosedswimming pools) etc. Under these circumstances, seek advicefrom experts as special protection will be required. Note:INTERNAL areas are those within the building envelope that arekept permanently dry.

AS1684.2-2010 and AS1684.3-2010- Aust ralian Standards forResidential Timber Frame Construction stipulates aminimum Z275 steel for all sheet metal products used in aninternal environment.

In areas outside the building envelope that are exposed torepeated wetting (EXTERNAL areas), Prydas stainless steel

products or equivalent should be considered. Some alternativesinclude hot dip galvanised or powder coated steel, which are notsupplied by Pryda. For more detailed information, read PrydasTechnical Update on Corrosion Resistance of Pryda Productsorcontact a Pryda office.

PRODUCT CERTIFICATIONPryda Australia warrants:

* Products in this guide are free from defects in the material ormanufacturing

* Design capacities are in accordance with test results or current,relevant Australian standards and the Building Code ofAustralia.

* Pryda products are structurally adequate provided they aredesigned, installed and used completely in accordance withthis guide.

This warranty applies only to:

* products in this guide

* products used in the specified applications and not damagedafter manufacture and supply

* joints free from wood splitting, decay or other timber defectswithin the joint or within 150 mm of the joint.

INSTRUCTIONS FOR INSTALLATION

These notes are provided to ensure proper installation.1. All fasteners used must be manufactured by reputable

companies and be of structural quality.

2. Connectors must not be installed on timber which is split beforeor during installation. If the timber is likely to split as fastenersare driven, fastener holes must be pre-drilled.

3. Do not overload the joints- during construction or in service.

4. Bolt hole diameter must be 0.8 mm to 1.5 mm larger than thebolt diameter and the specified washers must be installed.

5. Use proper safety equipment and due care in installing theseconnectors

6. Any gaps in joints between the timber members must notexceed 3 mm

7. Do not over-tighten screws.


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PrydaNailplates Guide

INDEX

GENERAL NOTESUseful Notes and Definitions for effective reading of this guide4

CONNECTOR PLATESQuick and easy butt joint connector

5

CORNER PLATEBracket for right angle joints

6

KNUCKLE NAILPLATES STANDARD & SPECIAL

Hammer applied nailplates for many joint typesSpecial types for specific uses

7

MININAILClaw Nailplate for simple butt joints

9

NAIL-ON PLATESConnector plates for joints with Pryda Timber Connector Nails

10

POLE CATSAnti-split nailplates for ends of poles and posts

12

STRAP NAILSConnector plates with built-in Claw Nails

12

Product Information Updates

Information contained in this product guide is subject to change.The latest updates are available from www.pryda.com.au.


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PRYDA TIMBER CONNECTORSNailplates Guide

4 PRYDA NAILPLATES GUIDE MARCH 2012

GENERAL NOTES

Timber Joint GroupsJoint groups for some common timber are tabulated

below. A more comprehensive table is given inAS1720.1: 2010.

Timbers Strength Group Joint Group

Dry Green Dry Green

Oregon (Douglas fir) America SD5 S5 JD4 J4

Oregon from elsewhere SD6 S6 JD5 J5

Radiata pine, heart-excluded SD6 NA JD4 NA

Radiata pine, heart-in SD6 NA JD5 NA

Slash pine SD5 S5 JD3 J3

Ash type hardwoods from Vic,NSW highlands & Tas

SD4 S4 JD3 J3

Non-Ash type hardwoods fromQld & NSW

SD3 S3 JD2 J2

Material ThicknessAll material thicknesses referred to in this guide arethe total coated thickness. This includes the zinccoating thickness, which is typically around 0.04mmfor Z275 steel.

Design Load CasesFollowing is a description of the combined load casesadopted in this design guide. These load cases are incompliance with AS/NZS1170.0:2002 Structuraldesign actions Part 0:General principles

Design Loads & Capacities

The tabulated capacities are for Category 1 joints as

described in Table 2.2 of AS1720.1:2010. For jointsin other Categories, reduce design capacities byusing the following factors:

Category 2 Joints: 0.94

Category 3 Joints: 0.88

Category 1 joints are defined in Table 2.2 AS1720.1:2010

as structural joints for houses for which failure wouldbe unlikely to affect an area of 25 sqm OR joints forsecondary elements in structures other than houses.

Machine Driven Nail UseWhere appropriate, 32x2.3 mm Duo-Fast C SHEG(ie: screw hardened electro galvanized) machinedriven nails (code D40810) or equivalent may beused instead of the specified 35x3.15 mm PrydaTimber Connector Nails to fix Pryda connectorsprovided that:

20% more nails are used (eg: 5 instead of 4, 4instead of 3, 3 instead of 2) or alternatively, designcapacities are to be reduced by 20% where thesame number of nails are used

machine driven nails are driven at nail spacingsand edge distances similar to the hole pattern butthese nails are not driven into the holes.

Load Case Descrip tion

1.35GPermanent Action (or Dead Load)only

1.2G+1.5QrPermanent and Roof ImposedActions (or Dead & Roof Live)

1.2G+1.5QfPermanent and Floor ImposedActions (or Dead & Floor Live)

1.2G+Wd Permanent and Wind down Actions(or Dead & Wind down)

Wind Uplift

(0.9G Wup)

Permanent and Wind Up Actions (orDead & Wind up)


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PRYDA NAILPLATES GUIDE MARCH 20126

CORNER PLATEGalvanised bracket for right angle joints

FeaturesThe Pryda Corner Plate is especially designed forjointing corner timbers in light framing applications suchas gate frames, and also a wide range of other usesincluding wall frames, tops of pergola beams, furnitureframing etc.

Suitable for use as either left or right hand and eitherthe vertical or horizontal position.

Specification

Material Steel is 1.6 mm, G300-Z275Galvanised

Product Code CPL

Packing 150 per carton

The use of galvanised Pryda Timber Connector Nails35 x 3.15 mm is recommended.

Dimensions

Design CapacitiesLimit State Design capacitiesper Pryda Corner Plate aretabulated below for fixing with

four galvanised 35 x 3.15 mmPryda Timber Connector Nails each side of the joint.

Join t Design Capacity (Nj) (kN) for Load Case:

Group 1.35G 1.2G +1.5Qf

1.2G +1.5Qr

1.2G+Wd or0.9G - Wu

Load direction A

JD3 3.1 3.8 4.2 6.2JD4 2.2 2.7 3.0 4.4

JD5 1.9 2.3 2.5 3.7

J3 2.2 2.7 3.0 4.4

J4 1.6 1.9 2.1 3.1

Load direction B

JD3 1.9 2.3 2.6 3.9

JD4 1.4 1.7 1.9 2.8

JD5 1.2 1.4 1.6 2.3

J3 1.4 1.7 1.9 2.8

J4 1.0 1.2 1.3 2.0

Notes: 1. See General Notes (page 4) for load casedescriptions

2. Wind Uplift capacities are based on the TimberDesign Standard, AS1720.1:2010 using k1=1.14

Appl ications

11071.57 7 31.5

7

32

21

14

46

60

15 15

7 16 7

7

16

7

15

1530

"B"

"A"

Directions ofload capacitiestabulated below


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PRYDA NAILPLATES GUIDE MARCH 2012 7

KNUCKLE NAILPLATES STANDARD & SPECIALHammer Fixed, Easy to Use Nailplatesfor Many Applications

FeaturesPryda Knuckle Nailplates are galvanised steelconnectors with in-built, bent-up knuckle nails.These plates are ideal for many structural and non-structural timber jointing and timber protectionuses. Applied simply by hammering in theknuckle nails, these plates are used bytradesmen, home owners, frame and boxmanufactures, electricity supply authorities andbuilders. Special pressing equipment is notnecessary.

Among the many uses of Knuck le Nailplates(see

Applications following), the most common are:jointing of wall frames together on-site

on-site splicing of timber beams

reinforcement of corners of boxes and bins

reinforcement of bolted joints (eg: in CableTruss)

truss manufacture in areas with low labour costs.

Generally, Knuckle Nailplates:

provide a strong, economical and easy-to-usemeans of jointing timbertogether

protect timber from damageas they:- resist splitting due to drying of the timber,

nailing near ends or other causes eg: BinStraps

- resist the effects of impact loads such asfrom fork lift tyne strikes

- dissipate electricity current surges in crossarms over a larger area (eg: Shunt plates)

distribute concentrated loads over a widerarea. For example, they increase the strength ofbolted joints.

hold joints together, preventing or restricting

the separation of nailed joints such as in boxesand crates, eg: Bin Straps.

As well as the standard flat plate will all nail columnspunched, Knuckle Nailplatescan be manufactured:

(a) with columns of nails omitted for greater steel strengthor for inclusion of a bolt hole

(b) bent at right angles with the nails outside (externalangle) or inside (internal angle)

(c) in coils or bar stock which allow customers to cut off thelengths they require

DescriptionKnuckle Nailplatesare available in a wide standard rangeas tabulated opposite. Larger sizes are available onrequest. Other forms of this plate could be developed givensufficient demand for the product.

The steel used is 1.0 mm thick, ZincForm G300 Z275or

equivalent. Product codes for non-special plates refer to thenumber of columns of nails and the number of rows. Forexample, a 4R8 has 4 rows and 8 columns.

Product details

Diagram Product Code Size Packaging

(mm) MerchantPack

TradePack

R4 Nailp lates 33 wide x

TP4R4 127 133

TP6R4 190 89


MP4R5 127 100

MP6R5 190 66

R8 Nailp latesMP4R8MP6R8

67 wide x127190

6644

MP8R8 254 33


MP2R10 63 100

TP3R10 95 66

MP4R10 127 50

MP6R10 190 33

MP8R10 254 26


MP4R16 127 33

MP6R16 199 22

MP8R16 254 16

Note: Merchant packs are individually barcoded.


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Knuck le Nailplates Standard & Special continued:

Diagram Product Code Size (mm) Packaging

Bin Straps8N5B1 64x190x44 75

Shunt Plates5N10 89 x 159

with hole80

PropertiesDesign Capacities for Pryda Knuckle Nailplates havebeen established from standard laboratory tests inaccordance withAS 1649-2001 Timber Methods of testfor mechanical fasteners and connectors - Basic workingloads and characteristic strengths. Loads are related tothe standard joint groups for timber defined in AS 1720.1

-2010 in Prydas Timber Data. Also read General Notesin page 4.

InstallationKnuckle Nailplates are installed simply by hammeringon the knuckles of all nails in each plate. It isrecommended that the hammer be parallel to the lengthof the nails (see diagram below) to ensure full penetrationof the nails.

Hammer Parallel to Nails

A natural arc or dovetail effect is created by the nails asthey penetrate into the timber. This provides positiveresistance to nail withdrawal.

For butt jointing, Knuckle Nailplates are installedsymmetrically over the joint, ie: with an equal length oneach side (3 mm tolerance). For timber up to 150 mmwide, one plate is fixed onto each face; for wider timber,two plates are used, fixed at 3mm maximum from each

edge.

Single Plate Butt Jointing

Double Plate Butt Jointing

Appl ications

Some of the many applications of Knuckle Nailplatesare illustrated below:

Joining top plates (4R8) Washer plate for Cable Truss

Bin Strap (NBS) Purlin or Joist Splice (4R5)

End Jointing(4R16, 6R10)

Shunt Plate(5N10)

Equal Equal

Equal Equal

3mmmax.

mmmax.


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Knuck le Nailplates Standard & Special continued:

Design CapacitiesLimit State Design capacities per Pryda Knuckle Nailare:

Load

Direction

Design Dead Load Capacity Nj(N) per Nail

for Timber Joint Group:

Green Timber Dry Timber

J4 J3 J2 JD5 JD4 JD3 JD2

Parallel 250 320 410 280 280 410 520

Perp. 180 220 300 190 190 300 370

Notes:

1. Parallelin the above table applies to the case where theload is applied parallel to the nail slots in the plate andalso parallel to the timber grain (see diagram below).Perpendicularapplies where the load direction is not asdefined for Parallel.

2. Limit State Design capacities do not include the capacity

factor , ie: - 0.85 factor for joints in houses and onsecondary beams in other structures. See AS 1720.1Table 2.6 for other structures.

Perpendicular applies where the load direction is not asdefined for Parallel.

To calculate the number of teeth per plate, multiplythe first figure in the plate code by the second, eg:

- for 4R8, teeth = 4x8 = 32

- for 8R16, teeth = 8x16 = 128

On an area basis, there are conservatively, 3.5 nailsper 1000 mm of plate area.

In timber joint design, nails within 12 mm of ends orwithin 6 mm of edges are regarded as not effective.

As the nail rows in these plates are 32 mm apart, allnails are effective in Knuckle Nailplates fixedsymmetrical over the joint (3 mm tolerance).

Ineffective Nail Areas in Joint s

Steel Strength

Property Design Capacity, Nj (N/mm)

per Pair of Plates

Longitudinal Lateral

Tension 350 132

Shear 88 154

The Design Capacities for Steel Strength includes a

capacity reduction factor = 0.90

MININAILA pre-punched, mini nai lp late for jo ining orconnecting timber

Features

Pre-punched nails

Sharp tooth profile- penetrates readily into hardwoodsand softwoods

Can be used as a mini joiner for narrow timber or forfixing fabric/foil to timber

Suitable for both trade use (eg: furnituremanufacture) or handyperson application

Manufactured from 1.0 mm G300-Z275 Galvanised

steel.

DimensionsThe dimensions of Pryda Mini Nail are as shownbelow:

SpecificationPacking Cartons 500

Merchant Packs of 7 x 30

Code 2C1S (Bulk)

MP2C1S (Merchant Pack)

Appl icationsPryda Mininailis used for simple butt joints of timber ofsmall sizes and for applications such as in furniture.

Load directionParallel to nail slotsand Parallel totimber grain

24

Butt jointne ec ve na s

in pink areas

Ineffective nailsin pink areas

6 mm

6 mm

50 mm

25 mm


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NAIL-ON PLATESHeavy duty pre-punched plates Features

Pryda Nail-on Plates are flat, galvanised or stainlesssteel plates which are nail-fixed to timber to formvarious types of joints. Their medium to high load

capacities and wide range of sizes makes them ideallysuited for on-site work, including:

Joining trusses on-site that have been made in partsin the factory.

Fixing trusses to poles

Any heavy duty timber connection where a Knucklenailplatewill not suffice

Joining beams

Repair work over existing fixings.

Pre-bent forms of Nail-on Platesare also available foruse as cleats and brackets.

Specification

Size: Size range is shown in Design Capacitiestable.

Steel: 1.0mm G300-Z275 galvanised steel

0.9mm in stainless steel

Product codes below are made up from: Width/Length, ie:

Thickness: 1.0 mm thick

75 mm widthsizes:

NPA75/125, NPA75/190, NPA75/250,NPA75/315, NPA75/380

100 mm width NPA100/190

126 mm width NPA126/50

150 mm width NPA150/250, NPA150/315

Packing: Approx. 1.2 square metre per carton

InstallationUse only 35 x 3.15mm galvanised Pryda Timber Connector Nails or equivalent nails with these connectors.Stainless steel nails must be used with stainless steel Nail-on plates.

Number of Nail Holes per Plate

Plate Plate Length (mm)Width 50 125 190 250 315 380

75 24 36 48 60 72

100 48

126 15

150 96 120

Note: Nail density is approx. one nail per 400 mm2

Nails must be driven into all holes (ie: all holes filled), except for holes within 60 mm of timber ends and 15mm oftimber edges, to achieve the full Design Capacities - see Design Capacities for a typical Splice Joint .

Shear

Bending

Tension

ry a a -on ae

PrydaNail-on Plates


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Nail-On Plates continued:

Design Capacities for a typical Splice JointLimit State Design capacities for Pryda Nail-on Platesper pair of plates are as tabulated below with conditions:

* All nail holes filled except within 60 mm of timber ends

* Minimum edge distance to nail centre = 5D = 16 mm* Minimum edge distance plate to timber edge = 5 mm* Loading case = 1.2G +1.5Qr (Roof Live + Dead Load)* Nails within 60 mm of butt joint are neglected* Positioning tolerance along plate length = 3 mm

Notes 1. These design capacities apply directly for Category 1 joints as described in Table 2.2 ofAS1720.1:2010. For Category 2 and Category 3 joints, multiply these capacities by 0.94 and 0.88respectively.

2. The nail capacities (Nj) given in the tab le ab ove is ca pab le of res isting a res ultant de sign forcearising from an axial tension and shear forces (i.e vector sum of the axial tension and shearforces).

3. The design capacities tabulated above apply directly to joints on JD4 timber for 1.2G+1.5Qr loadcase using k1= 0.77. For other load cases and timber joint groups, multiply these capacities by theload factors given below.

The resultant capacity must not exceed the maximum Steel Tension and Steel Shear valuestabulated above.

4. N/S in the above table signifies that the plate is not suitable for a splice joint connection, due toineffectiveness of nails resulting from end-distance violations.

5. The duration factor (k1) for wind load case in the table below is taken as 1.14, as specified inTable 2.3 of AS1720.1:2010.

6. Pryda Timber Connector nails may be replaced by Type 17 screws to achieve greater capacities.The end/edge distance and spacing requirements for screws are different to nails and thereforeshould be specified by the designer.

LoadCase:

1.35G 1.2G + 1.5Qf1.2G + Wd or

0.9G - Wu

Factor: 0.74 0.90 1.48

Join t group: J4 J3 J2 JD5 JD3 JD2

Multiplier: 0.62 0.88 1.24 0.83 1.4 1.8

63 mm Ineffective

Half plate length +/- 3 mm

Plate MinimumTimberWidth(mm)

Design Capacity Nj(kN) for a pair of plates in JD4 timber

Width Plate Length (mm) Steel Capaciti es

(mm) 50 125 190 250 315 380 Max Tension Max Shear

75x1.0 90 N/S 6.4 12.8 19.2 24.4 35.2 21.2

100x1.0 120 9.0 46.0 27.6126x1.0 140 N/S 58.0 35.0

150x1.0 170 26.0 40.0 70.2 42.5


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Design CapacitiesDESIGN DEAD LOAD (1.35G) CAPACITIES FOR STRAP NAILS - LOAD ALONG PLATE

Product Code Width

mm

SteelCap.

kN

Nail Dirn.To Load

NailsEachEnd

Design Capacity Njper Strap Nail (kN)for Timber Joint Group:

J4 J3 J2 JD5 JD4 JD3 JD2

SN2 25 2.9 Perp. 10 0.7 1.1 1.5 1.1 1.3 1.5 1.8

SN4C 38 4.6 Parallel 12 1.1 2.2 2.8 2.0 2.3 2.8 2.8

SN5, SN5B 50 5.7 Perp. 16 1.2 1.8 2.3 1.7 2.0 2.3 2.9

SNL5C 50 7.2 Perp. 20 1.5 2.2 2.9 2.1 2.5 2.9 3.6

SN7 75 8.6 Perp. 30 2.2 3.3 4.4 3.2 3.8 4.4 5.4

Notes 1. These design capacities apply directly for Category 1 joints as described in Table 2.2 ofAS1720.1:2010. For Category 2 and Category 3 joints, multiply these capacities by 0.94 and0.88 respectively.

2. The above capacities are given for 1.35G load case. For other load cases, increase capacitiesby multiplying with the corresponding factor tabulated below. However, design capacity mustnot exceed the value in the Steel Cap. column.

LoadCase:

1.2G + 1.5Qf 1.2G + 1.5Qr1.2G + Wd or

0.9G - Wu

Factor: 1.20 1.35 2.00

Top PlateButt Joint

rsectionop Plates

Top Plate CorConnection

LOADING ALONG THE PLATE - Examples

Documents

Nail Plates Guide