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GB 7059-2007Safety requirements for portable wood ladders (English PDF)

便携式木折梯安全要求

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Issued by

AQSIQ; SAC

Level / Type

National · Mandatory

Issue date

June 26, 2007

Implementation date

February 1, 2008

Scope

GB 7059-2007 is the English-translated version of 便携式木折梯安全要求.

China's mandatory safety standard for portable wooden ladders - the stepladders and leaning ladders that are carried to the job, used by one person without any fall protection, and that account for a large share of the falls from height recorded every year.

Wood is not a controlled material the way steel is: its strength depends on the species, the grain, the knots and the moisture, and two ladders that look identical can be far apart in what they will carry.

The standard specifies the terms and definitions, the classification, the requirements, the test methods, the inspection rules and the marking for portable wooden ladders.

It applies to the portable wooden ladders used at work and in the home.

The requirements begin with the material, since that is where the safety of a wooden ladder is decided: the species that may be used, the moisture content, the slope of grain and the knots, splits and other defects permitted in a stile and in a rung, which are held to far tighter limits than in ordinary sawn timber.

On top of that are set the dimensions and the geometry - the width, the rung spacing, the angle of a stepladder and the length limits - the joints between rung and stile, the hardware, the spreaders and locking devices, and the feet and their slip resistance.

The test clause is the substance of the document: the static load tests on the ladder as a whole and on the individual rung, the deflection under load, the twisting and racking tests, the stability of a stepladder, the durability of the joints and the slip resistance of the feet, each with the loads, the supports and the acceptance criteria set out.

Issued on 26 June 2007 and in force since 1 February 2008, it replaces GB 7059.1-1986.

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Document preview — GB 7059-2007

National Standard of the People's Republic of China

ICS: 13.100
Classification: C 68
Replacing: GB 7059.1-1986

Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the PRC

1 Scope
2 Normative references
3 Terms and definitions
4 Classification
5 Requirements
6 Test methods
7 Inspection rules
8 Marking

1 Scope

This standard specifies the terms and definitions, the classification, the requirements, the test methods, the inspection rules and the marking for portable wooden ladders.

It applies to the portable wooden ladders used at work and in the home.

Why the material clause comes first

Wood is not a controlled material the way steel is. Its strength depends on the species, on the direction of the grain, on the knots and on the moisture content, and two ladders that look identical can be far apart in what they will carry. The safety of a wooden ladder is therefore decided before it is assembled.

The requirements accordingly begin with the species that may be used, the moisture content, the slope of grain, and the knots, splits and other defects permitted in a stile and in a rung, held to limits far tighter than those of ordinary sawn timber.

Geometry, hardware and testing

On top of the material are set the dimensions and the geometry - the width, the rung spacing, the angle of a stepladder and the limits on length - the joints between rung and stile, the metal hardware, the spreaders and locking devices that stop a stepladder opening under load, and the feet and their slip resistance.

The test clause is the substance of the document: the static load tests on the ladder as a whole and on the individual rung, the deflection under load, the twisting and racking tests, the stability of a stepladder, the durability of the joints and the slip resistance of the feet, each with its loads, its supports and its acceptance criteria. Clause 7 gives the inspection rules and clause 8 the marking the user has to be able to read on the ladder itself.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 1931

Cited by

Similar standards

GB 4053.1-2009|GB 4053.2-2009|GB 4053.3-2009|GB/T 4823|GB/T 17889.1|GB 2894

Editions of GB 7059

Edition	Title	Revision	Status
GB 7059-2007	Safety requirements for portable wood ladders	first revision	Current
GB 7059.1-1986	Portable wood ladders	first issue	Superseded

This page sells the current edition, GB 7059-2007. Earlier editions are listed for reference only.

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