GB/T 33944-2017Mobile detachable working towers—Safety technical criterion (English PDF)

Foreword

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

Introduction

The mechanical safety standards are structured as follows.

--- Class A standard (basic safety standards), given the basic concepts applicable to all machinery, design principles and general characteristics.

--- Class B standard (General Safety Standard) relates to a safety feature of machinery or a wide range of safety devices.

- B1, safety characteristics (such as safety distance, surface temperature, noise) standards;

- B2 class, safety devices (such as two-handed control device, interlock, pressure-sensitive devices, guards) standards.

--- Class C standard (machine safety standard), a specific machine or a group of machines provides detailed safety requirements of the standard.

According to the provisions of GB/T 15706, this standard belongs to Class B standard.

This standard is especially relevant to the following stakeholders related to mechanical safety.

--- Machine manufacturer;

--- Health and safety agencies.

Other stakeholders affected by the level of mechanical safety are.

--- Machine users;

--- machine owner

--- service provider;

--- Consumer (for the intended use of machinery by consumers).

The above stakeholders are likely to participate in the drafting of this standard.

In addition, this standard is intended for the drafting of standard C standardization bodies.

The requirements of this standard may be supplemented or modified by C standards.

For machines designed and manufactured in accordance with category C standards within the scope of category C standards, the requirements of category C standards are preferred.

1 Scope

This standard specifies the mobile removable tower classification, model, material and its protection, general requirements, load requirements, structural design Requirements, tests and usage information.

This standard applies to prefabricated parts, and the height of 2.5m ~ 12m (indoor) and 2.5m ~ 8m (outdoor) removable removable Work tower (hereinafter referred to as tower).

Note: "Indoor" means the tower is not affected by the wind, "Outdoor" means that the tower may be affected by the wind.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 14687 industrial castors and wheels

GB/T 15706 General Principles of Mechanical Safety Risk Assessment and Risk Reduction

GB/T 17620-2008 live-insulated hard ladder

GB/T 17889.1-2012 Ladders Part 1: Terms, types and functional dimensions

GB/T 17889.2-2012 Ladders - Part 2: Requirements, tests and markings

GB/T 17889.3 ladder Part 3: Manual

GB/T 31539 structural fiber-reinforced composite material pultruded profiles

GB 50005 wood structure design specifications

GB 50009-2012 Building structural load codes

GB 50017 steel structure design specifications

GB 50429 aluminum alloy structure design specification

JGJ 130-2011 Safety code for construction of fastener steel pipe scaffolding

3 Terms and definitions

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