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 est une norme nationale chinoise obligatoire en vigueur : Escape apparatus for building fire - Part 3: Escape ladder. Secteur : Construction. Thème principal : Sécurité des produits. Entrée en vigueur : 1 juin 2013.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

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.

Exigences techniques

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.

Méthodes d’essai

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.

Questions fréquentes

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.

Indications d’applicabilité

Type: Produit
CCS: C85
ICS: 13.220.10
Autorité compétente: National Fire and Rescue Administration
Comité technique: National Technical Committee on Fire Protection of Standardization Administration of China