GB/T 27685-2019Portable aluminium alloy ladder (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 27685-2011 "portable aluminum ladder". This standard is compared with GB/T 27685-2011, except for editorial The main technical changes outside the revision are as follows.

--- Revised the scope of application (see Chapter 1, Chapter 1 of the 2011 edition);

--- Revised the normative reference document (see Chapter 2, Chapter 2 of the 2011 edition);

---Modified terms and definitions (see Chapter 3, Chapter 3 of the 2011 edition);

---Modified the "structural type" of the product, added the ladder level in the product structure type, deleted the "ladder length", and added Working length, modified the total length of the ladder (see 4.1.1, 4.1.1 of the 2011 edition);

---Modified illustrations (see 4.1.1, 2011 version 4.1.2);

--- Increased ladder surface treatment type and membrane code (see 4.1.2);

--- Removed the markup and examples (see 4.1.3 of the 2011 edition);

--- Removed the "minimum measured wall thickness should not be less than 1.2mm" (see 2011 edition of 4.2.1.1);

--- Removed room temperature mechanical properties (see 2011 edition of 4.2.1.2 and Appendix A);

--- Added "quality assurance" (see 4.2);

--- Modified the aluminum alloy ladder structure and performance requirements, and incorporated the structural requirements into the "quality assurance", performance requirements into the "performance" (see 4.2 And 4.3, 2011 editions 4.3 and 4.4);

--- Increased cyclic load performance of aluminum alloy ladders (see 4.3.1, 4.3.2);

--- Increased pedal penetration performance and accidental folding performance of the ladder (see 4.3.2);

--- Removed the material test method (see 5.1 of the 2011 edition);

--- Modified the aluminum alloy ladder performance test method (see Chapter 5, 2011 editions 5.2 and 5.3);

--- Revised inspection and acceptance content (see 6.1.2, 2011 version 6.1.2);

--- Revised the group approval requirements (see 6.2, 2011 edition 6.2);

--- Increased inspection classification (see 6.3);

--- Revised the provisions of the inspection project (see 6.4, see 6.3 and 6.4 of the 2011 edition);

--- Revised the sampling regulations (see 6.5, 6.5 of the 2011 edition);

--- Modified the judgment of the test results (see 6.6, 6.6 of the 2011 edition);

---Modified the contents of "sign, packaging, transportation, storage and quality certificate" (see Chapter 8, Chapter 8 of the 2011 edition);

---Modified "order form (or contract) content" (see Chapter 9, Chapter 9 of the 2011 edition);

--- Added "boxing files" (see Chapter 10).

1 Scope

This standard specifies the requirements, inspection methods, inspection rules, traceability, marking, packaging, transportation, storage and quality of portable aluminum ladders. Certificates, order forms (or contracts) and packing documents.

This standard is applicable to aluminum alloy single ladders and aluminum alloy extension ladders (two and three extension ladders) made of aluminum alloy as the main material used in the home.

Portable aluminum alloy ladders (hereinafter referred to as ladders) such as aluminum alloy folding ladders and aluminum alloy combination ladders.

This standard does not apply to ladders and special ladders for special industries (such as fire ladders, roof ladders and mobile ladders).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 871 flat head rivet

GB/T 3190 chemical composition of deformed aluminum and aluminum alloy

GB/T 3195 aluminum and aluminum alloy drawn round wire

GB/T 6682 Analytical laboratory water specifications and test methods

GB/T 6892-2015 General industrial aluminum and aluminum alloy extruded profiles

GB/T 8170 Numerical Rounding Rules and Representation and Determination of Limit Values

GB/T 17889.1-2012 Ladder Part 1: Terminology, type and functional dimensions

GB/T 17889.2-2012 Ladder Part 2: Requirements, inspection and marking

GB/T 17889.3-2012 Ladder Part 3: Instructions for use

3 Terms and definitions

The following terms and definitions as defined in GB/T 17889.1-2012 apply to this document.