GB/T 17889.2-2021Ladders—Part 2: Requirements, test, marking (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1. Structure and Drafting Rules of Standardization Documents" drafted.

This document is part 2 of GB/T 17889 "Ladders". GB/T 17889 has released the following parts.

--- Part 1. Terms, types and functional dimensions;

--- Part 2. Requirements, tests and markings;

--- Part 3. Instructions for use;

--- Part 4. Ladders with single or multiple hinges;

--- Part 5. Telescopic ladders;

--- Part 6. Movable platform ladder.

This document replaces GB/T 17889.2-2012 "Ladders - Part 2. Requirements, Tests and Marking", this document and GB/T 17889.2- Compared with:2012, except for structural adjustment and editorial changes, the main technical changes are as follows:

--- Deleted all wood-related content (see:2012 edition 4.2.4, the third paragraph of 4.4, the third paragraph of 4.7, Figure 7~Figure 9, 4.8 the second paragraph);

--- Changed the scope (see Chapter 1, Chapter 1 of the:2012 edition);

--- Added the terms and definitions of "professional ladders" and "household ladders" (see 3.5, 3.6), and modified the terms of "composite materials" and "thermoplastic materials".

Terms and definitions (see 3.2, 3.3, 3.2, 3.3 of the:2012 edition);

--- Changed the general requirements (see 4.1, 4.1 of the:2012 edition);

--- Changed the material requirements (see 4.2, 4.2 of the:2012 edition);

--- Changed the design requirements (see 4.3, 4.3 of the:2012 edition);

--- Changed the requirements for ladder feet (see 4.8, 4.9 of the:2012 edition);

--- Changed the requirements for extension ladders and sectional ladders (see 4.9, 4.10 of the:2012 edition);

--- Changed the strength test requirements (see 5.2, 5.2 of the:2012 edition);

--- Added the description of the measurement benchmark for the bending test of the ladder frame (see the sixth paragraph of 5.3);

--- Changed the test plan for the ladder with a balance bar in the bottom end test of the ladder frame (see 5.5, 5.5 of the:2012 edition);

--- Increased the torsion test of self-supporting ladders (see 5.15);

--- Changed the test method for plastic ladders and deleted the insulation test (see 5.16, 5.16 of the:2012 edition);

--- Increased the durability test of free-standing ladders (see 5.17);

--- Added the slip test at the bottom of the leaning ladder (see 5.18);

--- Increased the strength test of the leaning ladder with side balance bar (see 5.19);

--- Increased the strength test of the leaning ladder of the strut-type balance bar (see 5.20);

--- Changed the torsion test in the length direction of the ladder (see 5.21, 5.15 of the:2012 edition);

--- Added judgment criteria (see 5.2~5.21);

--- Delete the certification requirements (see Chapter 7 of the:2012 edition);

--- Changed Appendix A (see Appendix A, Appendix A of the:2012 edition).

Introduction

Ladder is a commonly used climbing safety device. GB/T 17889 aims to improve the quality and safety level of ladder-related products, guarantee User safety consists of six parts.

--- Part 1. Terms, types and functional dimensions. Give the common terms and types of ladders, as well as those that need to be used in design and testing Functional dimensions that affect the quality and safety level of ladders and are designed to harmonize ladder-related standards.

--- Part 2. Requirements, tests and signs. Specify requirements for factors affecting the quality and safety level of ladders, and give corresponding test methods. Law, designed to ensure the safety level of the ladder.

--- Part 3. Instructions for use. The instructions for the use of ladders need to give information and specify requirements for the way of expression, in order to ensure the use of The person can use the ladder correctly according to the instruction manual.

--- Part 4. Ladders with single or multiple hinges. Special requirements are specified for hinged ladders to ensure the quality and safety of hinged ladders level.

--- Part 5. Telescopic ladders. Special requirements are specified for telescopic ladders to ensure the quality and safety level of telescopic ladders.

--- Part 6. Movable platform ladder. Special requirements are specified for movable platform ladders to ensure the quality of movable platform ladders. quantity safety level. Ladders part 2. requirements, tests and marking

1 Scope

This document specifies general design features, requirements and test methods for portable and mobile ladders.

This document applies to portable and mobile ladders.

This document does not apply to special purpose ladders, such as. fixed ladders, fire ladders, insulated ladders.

Note: This document is used in conjunction with GB/T 17889.1.

2 Normative references

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, dated citations documents, only the version corresponding to that date applies to this document; for undated references, the latest edition (including all amendments) applies to this document.

GB/T 228.1 Tensile Test of Metallic Materials Part 1. Test Method at Room Temperature

GB/T 1040.1 Determination of Tensile Properties of Plastics Part 1. General

GB/T 1040.2 Determination of Tensile Properties of Plastics Part 2. Test Conditions for Molded and Extruded Plastics

GB/T 1043.1 Determination of impact properties of plastic simply supported beams - Part 1. Non-instrumented impact test

GB/T 3854 Test method for Barcol hardness of reinforced plastics

GB/T 12467.1 Quality requirements for fusion welding of metallic materials Part 1. Selection criteria for corresponding grades of quality requirements

GB/T 12467.2 Quality requirements for fusion welding of metallic materials Part 2. Complete quality requirements

GB/T 12467.3 Quality requirements for fusion welding of metallic materials Part 3. General quality requirements

GB/T 12467.4 Quality requirements for fusion welding of metallic materials Part 4. Basic quality requirements

GB/T 16422.2-2014 Plastics Laboratory Light Source Exposure Test Method Part 2. Xenon Arc Lamp

GB/T 17889.1-2021 Ladder Part 1. Terms, Types and Functional Dimensions

GB/T 17889.3 Ladder Part 3. Instruction Manual

GB/T 19419 Welding Management Tasks and Responsibilities

ISO 14125 Determination of flexural properties of fiber-reinforced plastic composites (Fibre-reinforcedplasticcomposites- Determinationofflexuralproperties)

3 Terms and Definitions

The terms and definitions defined in GB/T 17889.1-2021 and the following apply to this document.