Standard No.:	GB 4053.2-2025
English Name:	Safety requirements for fixed metal ladders and platform—Part 2: Inclined ladders
Chinese Name:	固定式金属梯及平台安全要求 第2部分：斜梯
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 4053.2-2009 Safety requirements for fixed steel ladders and platform - Part 2: Steel inclined ladders GB 4053.2-2009E
Target Language:	English
File Format:	PDF
Word Count:	9500 words
Translation Price(USD):	285.0
Delivery:	via email in 1~3 business day

GB 4053.2-2025 Safety requirements for fixed metal ladders and platform—Part 2: Inclined ladders 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 4053.2-2025 Replaces GB 4053.2-2009 Safety requirements for fixed metal ladders and platform - Part 2: Inclined ladders 固定式金属梯及平台安全要求 第2部分：斜梯 Issue date: 2025-12-31 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 Inclination Angle and Flight Height 4.2 Materials 4.3 Loads 4.4 Manufacturing and Installation 4.5 Corrosion Protection 4.6 Lightning Protection and Grounding 5 Structural Requirements for Sloped Ladders 5.1 Clear Passage Space 5.2 Inside Clear Width 5.3 Tread Width and Riser Height 5.4 Treads 5.5 Guardrails and Handrails for Sloped Ladders 6 Intermediate Platforms and Doors 6.1 Intermediate Platforms 6.2 Self-Closing Doors 7 Instructions for Use and Warning Information Appendix A (Informative) Recommended Values for Inclination Angle of Sloped Ladders and Examples of Tread Width and Riser Height Combinations Bibliography Fixed Metal Ladders and Platforms - Safety Requirements - Part 2: Inclined Ladders 1 Scope This document specifies the general requirements, structural requirements for inclined ladders, as well as requirements for intermediate ladder platforms and doors, and instructions for use and warning information for fixed metal inclined ladders (hereinafter referred to as "inclined ladders"). This document applies to the design, manufacture and installation of fixed metal inclined ladders used in workplaces within industrial enterprises. This document does not apply to fixed metal inclined ladders installed on nuclear facilities, ships, hoisting machinery and transmission towers. 2 Normative References The contents of the following documents are incorporated into this document as essential provisions by normative reference in the text. For dated reference documents, only the version corresponding to the specified date applies to this document; for undated reference documents, the latest version (including all amendment sheets) applies to this document. GB 2894 Safety Colours and Safety Signs GB 4053.3-2025 Fixed Metal Ladders and Platforms - Safety Requirements - Part 3: Industrial Protective Barriers and Platforms GB/T 50046 Code for Corrosion Protection Design of Industrial Buildings GB 50057 Code for Design of Lightning Protection of Buildings GB 50205 Code for Construction Quality Acceptance of Steel Structures GB 50576 Code for Construction Quality Acceptance of Aluminium Alloy Structures GB/T 51082 Code for Coating Design of Industrial Buildings GB 55006 General Code for Steel Structures 3 Terms and Definitions The terms and definitions defined in GB 4053.3 and the following apply to this document. 3.1 inclined ladderA permanent metal tread ladder attached to building structures or equipment, with a pitch angle greater than 20° and less than or equal to 75° (see Figure 1). 3.2 spiral ladderAn inclined ladder (3.1) with fan-shaped treads arranged around a metal support column, presenting a circular shape in horizontal projection and a spiral pitch line (3.3) (see Figure 2). 3.3 pitch lineAn imaginary line formed by the homolateral end points of the nosings (3.7) of adjacent treads (3.6) in a ladder flight (3.11) (see p in Figure 1). 3.4 angle of pitchThe angle between the pitch line (3.3) or its tangent and the horizontal plane (see α in Figure 1). 3.5 stileA load-bearing member that supports treads (3.6) and other attached components (see 6 in Figure 1). 3.6 tread (step)A horizontal member stepped on by personnel when ascending or descending an inclined ladder (3.1) (see 7 in Figure 1). 3.7 nosingThe outer edge line of the upper surface of a tread (3.6) (see 5 in Figure 1). 3.8 goingThe horizontal projected distance between the nosings (3.7) of adjacent treads (3.6) (see g in Figure 1). NOTE: The treads (3.6) of a spiral ladder (3.2) are fan-shaped, and the going increases towards the outer side. 3.9 riseThe vertical distance between the upper surfaces of two adjacent treads (3.6) (see r in Figure 1). 3.10 inside clear width (ladder width)The horizontal clear distance between the sides of the treads (3.6). 3.11 ladder flightA continuous section of an inclined ladder (3.1). NOTE: For an inclined ladder (3.1) without intermediate ladder platforms (3.13), the ladder flight is located between the bottom starting surface and the top landing surface; for an inclined ladder (3.1) with intermediate ladder platforms (3.13), the ladder flight is located between the bottom starting surface or the top landing surface and the adjacent platform, or between two adjacent platforms. 3.12 handrailA rod member installed on the top of protective barriers or the side of an inclined ladder (3.1), for personnel to grasp or hold onto (see 3 in Figure 1). [Source: GB 4053.3-2025, 3.3, modified] 3.13 intermediate platformA platform between upper and lower adjacent ladder flights (3.11), for personnel to switch ladder flights (3.11) or rest (see 1 in Figure 3). [Source: GB 4053.3-2025, 3.11, modified] 4 General Requirements 4.1 Angle of Pitch and Ladder Flight Height 4.1.1 The angle of pitch of an inclined ladder shall be determined based on factors such as climbing height, personnel passage frequency, installation space and installation conditions. NOTE: Appendix A gives the recommended values for the angle of pitch of inclined ladders. 4.1.2 The height of a ladder flight shall not exceed 6 m. When the total height H is greater than 6 m, the ladder shall be installed in sections (see Figure 3). 4.2 Materials The performance of metal materials used for inclined ladders and their attached components shall meet the requirements for the load-bearing capacity and deformation of the components, as well as the requirements of the environmental conditions. 4.3 Loads 4.3.1 Stiles The loads on inclined ladders shall be determined according to the actual service conditions, and the stiles shall be able to withstand a uniformly distributed live load characteristic value of not less than 3.5 kN/m² on the horizontal projection plane and a concentrated live load characteristic value of not less than 4.4 kN applied at any position of the stiles. The uniformly distributed live load and the concentrated live load shall not act simultaneously. 4.3.2 Treads 4.3.2.1 Treads shall be able to withstand a uniformly distributed live load characteristic value of not less than 2.2 kN/m along the ladder width direction.