GB/T 17889.1-2021Ladders—Part 1: Terms, types, functional sizes (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 1 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 17889.1-2012 "Ladders - Part 1. Terms, Types and Functional Dimensions", this document is related to Compared with GB/T 17889.1-2012, except for structural adjustment and editorial modification, the main technical changes are as follows:

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

--- Added the terms and definitions of "Hinged Ladder" (see 3.1.3);

--- Changed the definition of "ladder foot" (see 3.17, 3.30 of the:2012 edition);

--- Added the terms and definitions of "balance rod" (see 3.18);

--- Delete the term "extended length" (see 3.35 of the:2012 edition);

--- Give the symbols as Chapter 4 alone (see Chapter 4, Chapter 3 of the:2012 edition);

--- Changed the content of the leaning ladder (see 5.2, 4.2 of the:2012 edition);

--- Changed the content of self-supporting ladders (see 5.3, 4.3 of the:2012 edition);

--- Changed the content of the combined ladder (see 5.4, 4.4 of the:2012 edition).

Introduction

Ladder is a commonly used climbing safety device.

GB/T 17889 will improve the quality and safety level of ladder-related products and ensure the safety of users.

GB/T 17889 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 1 . terms, types and functional dimensions

1 Scope

This document defines the terminology of ladders and specifies the general design features of 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.

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 17889.2 Ladders - Part 2. Requirements, tests and marking

GB/T 17889.3 Ladder Part 3. Instruction Manual

3 Terms and Definitions

The following terms and definitions apply to this document.