GB21976.3-2012
Escape apparatus for building fire - Part 3: Escape ladder
建筑火灾逃生避难器材 第3部分：逃生梯
GB 21976.3-2012 is a current mandatory Chinese national standard for Escape apparatus for building fire - Part 3: Escape ladder. It appears in the Construction compliance cluster with a product safety focus and has an implementation date of Jun 1, 2013.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to fixed escape ladders and suspended escape ladders specifically designed for building fire evacuations. It is mandatory for manufacturers producing emergency escape equipment for the Chinese market. The standard covers structural classifications, technical specifications, and testing methodologies for these apparatuses, but does not apply to general-purpose industrial ladders.
Technical requirements
GB 21976.3-2012 specifies the structural and performance requirements for escape ladders, categorized into fixed and suspended types. For fixed escape ladders, the standard mandates specific requirements for tread dimensions, descent speed limits, and the inclusion of an emergency braking mechanism to prevent uncontrolled falls. Fixed ladders must maintain a descent speed between 0.1m/s and 0.4m/s under various load conditions. For suspended escape ladders, the requirements focus on the reliability of the suspension hooks, side ropes, and stirrups. The standard specifies minimum dimensions for ladder width and stirrup cross-sections, ensuring structural integrity during emergency use. Suspended ladders must withstand overall strength tests without hook detachment or significant slippage. Both types must undergo corrosion resistance treatments for metal components and feature anti-slip surfaces on treads or stirrups. The standard also outlines detailed marking and packaging requirements, including mandatory safety warnings such as "one person per tread/stirrup" on the product nameplate.
Testing methods
The standard outlines several critical testing procedures to verify compliance. These include strength tests for treads, handrails, and transmission chains under multiplied maximum loads, and shear strength tests evaluating the connection between treads and side ropes. Additionally, it mandates corrosion resistance tests using salt spray chambers per GB/T 10125, descent speed tests for fixed ladders, and reliability tests involving continuous cyclic operations to ensure long-term functional stability.
FAQs
What products are regulated under GB 21976.3-2012?
This standard regulates fixed escape ladders and suspended escape ladders used for building fire evacuations, specifying their technical requirements, testing methods, and marking rules.
Is GB 21976.3-2012 mandatory or recommended?
Chapters 5, 7, and 8.1 of this standard are mandatory, while the remaining chapters are recommended. Manufacturers must comply with the mandatory sections to sell these products in China.
What are the key safety features required for fixed escape ladders?
Fixed escape ladders must be equipped with an emergency braking mechanism that automatically stops the ladder if the descent speed exceeds 0.5m/s, ensuring safe evacuation.
The summary above provides a high-level overview of GB 21976.3-2012. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 21976.3-2012 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C85
- ICS
- 13.220.10
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China