Standard
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AS 1892.2-1992
[Current]Portable ladders, Part 2: Timber
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.
Published: 20/07/1992
Pages: 28
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
PREFACE
1 SCOPE AND GENERAL
1.1 SCOPE
1.2 APPLICATION
1.3 REFERENCED DOCUMENTS
1.4 DEFINITIONS
2 GENERAL REQUIREMENTS
2.1 DESIGN AND CONSTRUCTION
2.2 RATINGS
2.2.1 Duty rating
2.2.2 Load rating
2.3 MATERIALS
2.3.1 General
2.3.2 Species of timber
2.3.3 Quality of timber
2.3.3.1 General
2.3.3.2 Moisture content
2.3.3.3 Density of timber
2.3.3.4 Grading of timber
2.4 WORKMANSHIP AND FINISH
2.4.1 General
2.4.2 Finish
2.4.3 Fasteners
2.4.4 Fittings
2.4.5 Tolerances
2.5 STILES
2.5.1 Design
2.5.2 Manufacture
2.5.3 Joints in stiles
2.5.4 Grooving of stiles
2.5.5 Feet
2.5.5.1 Requirement
2.5.5.2 Foot friction test
2.6 TREADS AND RUNGS
2.6.1 Shape
2.6.2 Spacing
2.7 MARKING
2.7.1 All ladders
2.7.2 Double-sided stepladders
2.7.3 Wire bound ladders
2.7.4 Labels
3 PARTICULAR REQUIREMENTS FOR SINGLE LADDERS(INCLUDING CLEATED LADDERS)
3.1 LENGTH
3.2 STILES
3.2.1 Distance between stiles
3.2.2 Dimensions of stiles
3.2.2.1 Runged ladders
3.2.2.2 Cleated ladders
3.3 RUNGS AND CLEATS
3.3.1 Materials
3.3.2 Dimensions of rungs and cleats
3.3.3 Attachment of rungs and cleats to stiles
3.3.3.1 Rungs
3.3.3.2 Cleats
3.4 TIES AND THEIR FITTING
3.4.1 Arrangement
3.4.2 Material and fixing
4 PARTICULAR REQUIREMENTS FOR EXTENSION LADDERS
4.1 LENGTH
4.2 STILES
4.2.1 Distance between stiles
4.2.2 Dimensions and overlap
4.3 RUNGS
4.3.1 Materials
4.3.2 Dimensions
4.3.3 Attachment of rungs to stiles
4.3.4 Ties and their fitting
4.4 FITTINGS
4.4.1 General
4.4.2 Clutch
4.4.3 Stop
4.4.4 Guide brackets
4.5 ROPE AND PULLEY
4.5.1 General
4.5.2 Load
4.5.3 Rope
4.5.4 Pulleys
4.6 WIRE REINFORCEMENT
4.6.1 General
4.6.2 Wire
4.6.3 Fixing
4.6.4 End anchorage
4.7 FIBRE-REINFORCED PLASTICS REINFORCEMENT
4.7.1 General
4.7.2 FRP rod
4.7.3 Bonding
4.7.4 Anchorage
5 PARTICULAR REQUIREMENTS FOR STEPLADDERS
5.1 LENGTH
5.2 STILES AND BACK LEGS
5.2.1 Distance between stiles
5.2.2 Dimensions of stiles and back legs
5.2.3 Spread between stiles and back legs
5.2.4 Battening and bracing of back legs
5.2.5 Distance between back legs
5.3 TREADS
5.3.1 Dimensions
5.3.2 Location
5.3.3 Surface finish
5.3.4 Spacing of treads
5.3.5 Attachment of treads to stiles
5.3.5.1 Industrial stepladders
5.3.5.2 Domestic stepladders
5.4 BRACING OF TREADS IN INDUSTRIAL STEPLADDERS
5.5 TOP
5.6 BACK SUPPORT PLATE
5.6.1 Industrial stepladders
5.6.2 Domestic stepladders
5.7 HINGES
5.8 TIES AND THEIR FITTING IN INDUSTRIAL STEPLADDERS
5.8.1 Arrangement
5.8.2 Material and fixing
6 PARTICULAR REQUIREMENTS FOR PLATFORM STEPLADDERS
6.1 LENGTH
6.2 STILES AND BACK LEGS
6.2.1 Distance between stiles
6.2.2 Dimensions of stiles and back legs
6.2.3 Spread between stiles and back legs
6.2.4 Battening and bracing of back legs
6.2.5 Distance between back legs
6.3 TREADS
6.3.1 Dimensions
6.3.2 Location
6.3.3 Surface finish
6.3.4 Bracing of treads
6.4 PLATFORM
6.5 HINGES
6.6 TIES AND THEIR FITTING
6.6.1 Arrangement
6.6.2 Materials and fixing
7 PARTICULAR REQUIREMENTS FOR TRESTLE LADDERS
7.1 LENGTH
7.2 STILES
7.2.1 Distance between stiles
7.2.2 Dimensions
7.2.3 Spread between pairs of stiles
7.3 CROSSBEARERS
7.3.1 Dimensions
7.3.2 Spacing of crossbearers
7.3.3 Attachment of crossbearers to stiles
7.4 HINGES
7.5 CHECK BLOCKS
7.6 TIES AND THEIR FITTING
7.6.1 Arrangement
7.6.2 Materials and fixing
8 PARTICULAR REQUIREMENTS FOR DOMESTIC EXTENSION STEPLADDERS
8.1 LENGTH
8.2 STILES
8.2.1 Distance between stiles
8.2.1.1 Front stiles
8.2.1.2 Back stiles
8.2.2 Dimensions and overlap
8.2.3 Spread between front stiles and back stiles
8.3 TREADS AND RUNGS
8.3.1 Dimensions of treads
8.3.2 Dimensions of rungs
8.3.3 Location of treads
8.3.4 Surface finish
8.3.5 Attachment of treads and rungs to stiles
8.3.5.1 Attachment of treads to front stiles
8.3.5.2 Attachment of rungs to back stiles
8.3.6 Bracing of treads
8.4 FITTINGS
8.4.1 General
8.4.2 Stop
8.4.3 Spread between stiles
8.5 TOP
9 TIMBER LADDERS HAVING STILES OF TIMBER OTHER THAN DOUGLAS FIR
9.1 APPLICATION
9.2 MATERIALS
9.3 DIMENSIONS
9.3.1 Component spacing
9.3.2 Unreinforced stile dimensions
9.3.3 Reinforced stile dimensions
APPENDIX A
A1 SCOPE
A2 VISUAL GRADING
A3 VISUAL GRADING AND PROOF DEFLECTION TESTS METHOD
A3.1 General
A3.2 Visual grading
A3.3 Proof deflection
A3.3.1 Method of test
A3.3.2 Acceptance criteria
A3.3.2.1 Douglas fir stiles
A4 MECHANICAL STRESS GRADING
APPENDIX B
APPENDIX C
C1 GENERAL
C2 EQUATIONS FOR BENDING MOMENT
C2.1 Bending moment due to mass of ladder
C2.2 Bending moment due to the mass of the user
C2.3 Maximum bending moment
C3 EQUATIONS FOR EFFECTIVE SECTION MODULUS
C3.1 Stiles having circular holes for rungs
C3.2 Stile having transverse grooves for treads
C4 DERIVATION OF WORKING EQUATIONS
C4.1 For stiles having circular holes for rungs
C4.2 For stiles having transverse grooves for treads
Cited references in this standard
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