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AS 1892.2-1992

AS 1892.2-1992

Portable ladders Timber

Standards Australia

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Table of Contents

1 -  AS 1892.2-1992 PORTABLE LADDERS - TIMBER
4 -  PREFACE
 5 -  CONTENTS
 7 -  SECTION 1 SCOPE AND GENERAL
7 -  1.1 SCOPE
 7 -  1.2 APPLICATION
 7 -  1.3 REFERENCED DOCUMENTS
 7 -  1.4 DEFINITIONS
7 -  1.4.1 Portable timber ladder
 7 -  1.4.2 Domestic ladder
 7 -  1.4.3 Industrial ladder
 7 -  1.4.4 Single ladder
 7 -  1.4.5 Extension ladder
 8 -  1.4.6 Single-sided stepladder
 8 -  1.4.7 Double-sided stepladder
 8 -  1.4.8 Trestle ladder
 8 -  1.4.9 Trestle-backed steps
 8 -  1.4.10 Special-purpose ladder
 8 -  1.4.11 Maximum working length
 8 -  1.4.12 Overlap
 8 -  1.4.13 Stile
 8 -  1.4.14 Rungs and treads
 8 -  1.4.15 Top cap
 8 -  1.4.16 Step surfaces
 8 -  1.4.17 Section
 8 -  1.4.18 Duty rating
 8 -  1.4.19 Load rating
 10 -  SECTION 2 GENERAL REQUIREMENTS
10 -  2.1 DESIGN AND CONSTRUCTION
 10 -  2.2 RATINGS
10 -  2.2.1 Duty rating
 10 -  2.2.2 Load rating
 10 -  2.3 MATERIALS
10 -  2.3.1 General
 10 -  2.3.2 Species of timber
 10 -  2.3.3 Quality of timber
 10 -  2.4 WORKMANSHIP AND FINISH
10 -  2.4.1 General
 11 -  2.4.2 Finish
 11 -  2.4.3 Fasteners
 11 -  2.4.4 Fittings
 11 -  2.4.5 Tolerances
 11 -  2.5 STILES
11 -  2.5.1 Design
 11 -  2.5.2 Manufacture
 11 -  2.5.3 Joints in stiles
 11 -  2.5.4 Grooving of stiles
 11 -  2.5.5 Feet
 12 -  2.6 TREADS AND RUNGS
12 -  2.6.1 Shape
 12 -  2.6.2 Spacing
 12 -  2.7 MARKING
12 -  2.7.1 All ladders
 12 -  2.7.2 Double-sided stepladders
 12 -  2.7.3 Wire bound ladders
 12 -  2.7.4 Labels
 13 -  SECTION 3 PARTICULAR REQUIREMENTS FOR SINGLE LADDERS (INCLUDING CLEATED LADDERS)
13 -  3.1 LENGTH
 13 -  3.2 STILES
13 -  3.2.1 Distance between stiles
 13 -  3.2.2 Dimensions of stiles
 13 -  3.3 RUNGS AND CLEATS
13 -  3.3.1 Materials
 13 -  3.3.2 Dimensions of rungs and cleats
 13 -  3.3.3 Attachment of rungs and cleats to stiles
 14 -  3.4 TIES AND THEIR FITTING
14 -  3.4.1 Arrangement
 14 -  3.4.2 Material and fixing
 15 -  SECTION 4 PARTICULAR REQUIREMENTS FOR EXTENSION LADDERS
15 -  4.1 LENGTH
 15 -  4.2 STILES
15 -  4.2.1 Distance between stiles
 15 -  4.2.2 Dimensions and overlap
 15 -  4.3 RUNGS
15 -  4.3.1 Materials
 15 -  4.3.2 Dimensions
 15 -  4.3.3 Attachment of rungs to stiles
 15 -  4.3.4 Ties and their fitting
 15 -  4.4 FITTINGS
15 -  4.4.1 General
 15 -  4.4.2 Clutch
 15 -  4.4.3 Stop
 15 -  4.4.4 Guide brackets
 15 -  4.5 ROPE AND PULLEY
15 -  4.5.1 General
 15 -  4.5.2 Load
 16 -  4.5.3 Rope
 16 -  4.5.4 Pulleys
 16 -  4.6 WIRE REINFORCEMENT
16 -  4.6.1 General
 16 -  4.6.2 Wire
 16 -  4.6.3 Fixing
 16 -  4.6.4 End anchorage
 16 -  4.7 FIBRE-REINFORCED PLASTICS REINFORCEMENT
16 -  4.7.1 General
 16 -  4.7.2 FRP rod
 16 -  4.7.3 Bonding
 16 -  4.7.4 Anchorage
 17 -  SECTION 5 PARTICULAR REQUIREMENTS FOR STEPLADDERS
17 -  5.1 LENGTH
 17 -  5.2 STILES AND BACKLEGS
17 -  5.2.1 Distance between stiles
 17 -  5.2.2 Dimensions of stiles and back legs
 17 -  5.2.3 Spread between stiles and back legs
 17 -  5.2.4 Battening and bracing of back legs
 18 -  5.2.5 Distance between back legs
 18 -  5.3 TREADS
18 -  5.3.1 Dimensions
 18 -  5.3.2 Location
 18 -  5.3.3 Surface finish
 18 -  5.3.4 Spacing of treads
 18 -  5.3.5 Attachment of treads to stiles
 18 -  5.4 BRACING OF TREADS IN INDUSTRIAL STEPLADDERS
 18 -  5.5 TOP
 18 -  5.6 BACK SUPPORT PLATE
18 -  5.6.1 Industrial stepladders
 18 -  5.6.2 Domestic stepladders
 18 -  5.7 HINGES
 19 -  5.8 TIES AND THEIR FITTING IN INDUSTRIAL STEPLADDERS
19 -  5.8.1 Arrangement
 19 -  5.8.2 Material and fixing
 20 -  SECTION 6 PARTICULAR REQUIREMENTS FOR PLATFORM STEPLADDERS
20 -  6.1 LENGTH
 20 -  6.2 STILES AND BACK LEGS
20 -  6.2.1 Distance between stiles
 20 -  6.2.2 Dimensions of stiles and back legs
 20 -  6.2.3 Spread between stiles and back legs
 20 -  6.2.4 Battening and bracing of back legs
 20 -  6.2.5 Distance between back legs
 20 -  6.3 TREADS
20 -  6.3.1 Dimensions
 21 -  6.3.2 Location
 21 -  6.3.3 Surface finish
 21 -  6.3.4 Bracing of treads
 21 -  6.4 PLATFORM
 21 -  6.5 HINGES
 21 -  6.6 TIES AND THEIR FITTING
21 -  6.6.1 Arrangement
 21 -  6.6.2 Materials and fixing
 22 -  SECTION 7 PARTICULAR REQUIREMENTS FOR TRESTLE LADDERS
22 -  7.1 LENGTH
 22 -  7.2 STILES
22 -  7.2.1 Distance between stiles
 22 -  7.2.2 Dimensions
 22 -  7.2.3 Spread between pairs of stiles
 22 -  7.3 CROSS BEARERS
22 -  7.3.1 Dimensions
 22 -  7.3.2 Spacing of crossbearers
 22 -  7.3.3 Attachment of crossbearers to stiles
 22 -  7.4 HINGES
 23 -  7.5 CHECK BLOCKS
 23 -  7.6 TIES AND THEIR FITTING
23 -  7.6.1 Arrangement
 23 -  7.6.2 Materials and fixing
 24 -  SECTION 8 PARTICULAR REQUIREMENTS FOR DOMESTIC EXTENSION STEPLADDERS
24 -  8.1 LENGTH
 24 -  8.2 STILES
24 -  8.2.1 Distance between stiles
 24 -  8.2.2 Dimensions and overlap
 24 -  8.2.3 Spread between front stiles and back stiles
 24 -  8.3 TREADS AND RUNGS
24 -  8.3.1 Dimensions of treads
 24 -  8.3.2 Dimensions of rungs
 24 -  8.3.3 Location of treads
 24 -  8.3.4 Surface finish
 24 -  8.3.5 Attachment of treads and rungs to stiles
 24 -  8.3.6 Bracing of treads
 25 -  8.4 FITTINGS
25 -  8.4.1 General
 25 -  8.4.2 Stop
 25 -  8.4.3 Spread between stiles
 25 -  8.5 TOP
 26 -  SECTION 9 TIMBER LADDERS HAVING STILES OF TIMBER OTHER THAN DOUGLAS FIR
26 -  9.1 APPLICATION
 26 -  9.2 MATERIALS
 26 -  9.3 DIMENSIONS
26 -  9.3.1 Component spacing
 26 -  9.3.2 Unreinforced stile dimensions
 26 -  9.3.3 Reinforced stile dimensions
 27 -  APPENDIX A - METHODS OF GRADING TIMBER STILES
27 -  A1 SCOPE
 27 -  A2 VISUAL GRADING
 28 -  A3 VISUAL GRADING AND PROOF DEFLECTION TESTS METHOD
28 -  A3.1 General
 28 -  A3.2 Visual grading
 28 -  A3.3 Proof deflection
 29 -  A4 MECHANICAL STRESS GRADING
 31 -  APPENDIX B - EXAMPLES OF LABELS USED FOR ADDITIONAL SAFETY WARNINGS
 33 -  APPENDIX C - DERIVATION OF EQUATIONS FOR EXTREME FIBRE STRESS
33 -  C1 GENERAL
 33 -  C2 EQUATIONS FOR BENDING MOMENT
33 -  C2.1 Bending moment due to mass of ladder
 33 -  C2.2 Bending moment due to the mass of the user
 33 -  C2.3 Maximum bending moment
 33 -  C3 EQUATIONS FOR EFFECTIVE SECTION MODULUS
33 -  C3.1 Stiles having circular holes for rungs
 34 -  C3.2 Stile having transverse grooves for treads
 34 -  C4 DERIVATION OF WORKING EQUATIONS
34 -  C4.1 For stiles having circular holes for rungs
 34 -  C4.2 For stiles having transverse grooves for treads

Abstract

Sets out the minimum requirements for the materials, design and construction of timber ladders rated for domestic or industrial use. It applies to single, extension, step and trestle ladders as well as to platform step ladders and domestic extension step ladders. Methods for grading timber stiles and examples of labels that may be used to convey safety warnings are provided in appendices.

Scope

This Standard sets out the minimum constructional and safety requirements for the design and manufacture
of portable ladders with timber stiles.
The Standard provides for ladders of two duty ratings, viz 'industrial ladders' and 'domestic ladders', which are assigned minimum load ratings.
The Standard does not cover ladder accessories such as ladder levellers, ladder stabilizers or stand-off devices, ladder jacks, or ladder straps or hooks that may be installed on or used in conjunction with ladders.

General Product Information

Document Type Standard
Status Current
Publisher Standards Australia
Committee SF-034
Supersedes
  • AS 1688-1974
  • DR 89181

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