Standard No.:	GB 4053.3-2025
English Name:	Safety requirements for fixed metal ladders and platform—Part 3: Industrial guardrails and platform
Chinese Name:	固定式金属梯及平台安全要求 第3部分：工业防护栏杆及平台
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR, SAC
Issued on:	2025-12-31
Implemented on:	2027-1-1
Status:	to be valid
Superseding:	GB 4053.3-2009 Safety requirements for fixed steel ladders and platform - Part 3: Industrial guardrails and steel platform GB 4053.3-2009E
Target Language:	English
File Format:	PDF
Word Count:	10000 words
Translation Price(USD):	300.0
Delivery:	via email in 1~5 business day

GB 4053.3-2025 Safety requirements for fixed metal ladders and platform—Part 3: Industrial guardrails and platform English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered. ICS CCS H National Standard of the People's Republic of China ‌GB 4053.3-2025 Replaces GB 4053.3-2009 Safety requirements for fixed metal ladders and platform—Part 3: Industrial guardrails and platform 固定式金属梯及平台安全要求 第3部分：工业防护栏杆及平台 Issue date: 2025-12-02 Implementation date: 2027-01-01 Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China the Standardization Administration of the People's Republic of China Contents Foreword Introduction 1 Scope 2 Normative References 3 Terms and Definitions 4 General Requirements 4.1 Platform Inclination 4.2 Installation of Guardrails and Toeboards 4.3 Materials 4.4 Loads on Guardrails 4.5 Loads on Platforms 4.6 Manufacturing and Installation 4.7 Corrosion Protection 4.8 Lightning Protection and Grounding 5 Structural Requirements for Guardrails 5.1 Structural Form 5.2 Guardrail Height 5.3 Posts 5.4 Top Rails and Handrails 5.5 Intermediate Knee Rails and Intermediate Vertical Rails 5.6 Toeboards 6 Structural Requirements for Platforms 6.1 Platform Dimensions 6.2 Overhead Clearance 6.3 Platform Flooring 7 Doors 7.1 Self-Closing Gates 7.2 Mezzanine Gates 8 Instructions for Use and Warning Information Bibliography Safety Requirements for Fixed Metal Ladders and Platforms Part 3: Industrial Guardrails and Platforms 1 Scope This document specifies the general requirements, structural requirements for guardrails, structural requirements for platforms, as well as requirements for doors, instructions for use, and warning information for fixed industrial guardrails and platforms. This document applies to the design, manufacture, and installation of fixed metal guardrails and platforms used in workplaces within industrial enterprises. This document does not apply to fixed guardrails and platforms installed on nuclear facilities, ships, lifting machinery, power transmission towers, mast-type towers, communication towers, or meteorological towers. 2 Normative References The contents of the following documents become essential provisions of this document through normative reference herein. For dated references, only the edition corresponding to that date applies. For undated references, the latest edition (including all amendments) applies. GB 2894 Safety Colours and Safety Signs GB/T 50046 Standard for Anticorrosion Design of Industrial Buildings GB 50057 Code for Design of Lightning Protection of Buildings GB 50205 Standard for Acceptance of Construction Quality of Steel Structures GB 50576 Code for Acceptance of Construction Quality of Aluminum Alloy Structures GB/T 51082 Standard for Coating Design of Industrial Buildings GB 55006 General Code for Steel Structures 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Guardrail A structure permanently installed on inclined ladders (3.17), platforms (3.9), openings, or other open edges to prevent personnel from falling (see Figure 1). 3.2 Top Rail A bar installed at the top of a guardrail (3.1) for people to hold or grasp (see item 1 in Figure 1). 3.3 Handrail A bar installed at the top of a guardrail (3.1) or on the side of an inclined ladder (3.17) or walking platform (3.12) for people to hold or grasp. Note 1: The top rail (3.2) of a guardrail (3.1) for a platform (3.9), opening, or other open edge also serves as a handrail. Note 2: When the height of the top rail (3.2) of a guardrail (3.1) for an inclined ladder (3.17) does not exceed 1,200 mm, the top rail (3.2) also serves as a handrail. 3.4 Intermediate Knee Rail A protective bar installed parallel to and below the top rail (3.2) [see item 2 in Figure 1 a)]. 3.5 Intermediate Vertical Rail A protective bar installed vertically or perpendicularly to the top rail (3.2) and below it [see item 5 in Figure 1 b)]. 3.6 Bottom Knee Rail A protective bar installed below the top rail (3.2), supporting the intermediate vertical rails (3.5), and parallel to the top rail (3.2) [see item 6 in Figure 1 b)]. 3.7 Post A vertical member fixed to a platform (3.9), inclined ladder (3.17), or other fixed structure, supporting the guardrail members (top rail, intermediate knee rail, bottom knee rail) (see item 3 in Figure 1). 3.8 Toe board A protective plate at the bottom of a guardrail (3.1) used to prevent objects from falling or personnel from slipping out (see item 4 in Figure 1). 3.9 Platform A planar metal structure permanently installed on a building structure or equipment, providing a place for personnel to work, rest, or pass through. 3.10 Work Platform A platform (3.9) for personnel to perform equipment operation, process operations, and other work. 3.11 Intermediate Platform A platform (3.9) located between upper and adjacent lower flights of a vertical ladder (3.16) or inclined ladder (3.17), providing a place for personnel to switch ladder flights or rest. 3.12 Walking Platform A platform (3.9) for personnel to walk from one area to another. 3.13 Vertical Height Between Two Open Spaces The vertical height between the open edge of an upper platform (3.9), inclined ladder (3.17), or work surface and the lower platform (3.9) or work surface where a fall might occur. 3.14 Self-Closing Gate A protective gate that can close automatically (see item 1 in Figure 4). 3.15 Mezzanine Gate A protective gate installed on a platform (3.9) for loading and unloading goods. 3.16 Vertical Ladder A metal rung ladder permanently installed on a building structure or equipment, with an inclination angle to the horizontal plane between 75° and 90°. [Source: GB 4053.1—2025, 3.1] 3.17 Inclined Ladder A metal tread ladder permanently installed on a building structure or equipment, with an inclination angle greater than 20° and less than or equal to 75°. [Source: GB 4053.2—2025, 3.1] 4 General Requirements 4.1 Platform Inclination Work platforms and intermediate platforms shall be installed horizontally. The inclination angle of walking platforms relative to the horizontal plane shall not exceed 10°. 4.2 Installation of Guardrails and Toeboards 4.2.1 When the vertical height between two open spaces at the open edge of a platform or work surface is not less than 1,200 mm, a guardrail shall be installed at that open edge. 4.2.2 When there is a risk of adjacent facilities collapsing or easily causing injury to personnel at the open edge of a platform or work surface, or when the adjacent facilities cannot serve the protective function of a guardrail, a guardrail shall be installed at that open edge. Note: Examples include when adjacent platforms or roofs may collapse as they cannot bear personnel weight, or when their surfaces are inclined and easily cause personnel to slip. 4.2.3 Toeboards shall be installed on guardrails, except in the following cases: a) When the structure at the edge of the platform or work surface can serve the function of a