GB12142-2007

safety requirements for portable metal ladders

便携式金属梯安全要求

GB 12142-2007 は現行の中国強制国家規格です：safety requirements for portable metal ladders。業界：食品。テーマ：製品安全。施行日：2008年2月1日。

適用可否は製品範囲、認証ルート、所管当局の通知、移行規定によって異なります。コンプライアンス判断に使う前に、翻訳をご依頼いただくか公式情報源をご確認ください。

コンプライアンス概要

この概要は現在英語のみで提供しています。

適用範囲

GB 12142-2007 applies to the design, manufacturing, testing, and safe usage of portable metal ladders used in various production activities. This includes portable metal extension ladders (both two-section and three-section), single ladders (straight ladders), stepladders, and combination ladders. It is mandatory for all manufacturers producing portable metal ladders for the Chinese market. The standard replaces the previous GB 12142-1989 and GB 7059.3-1986 standards.

技術要求

This standard specifies comprehensive safety and structural requirements for portable metal ladders based on their rated load classifications (90kg, 100kg, 110kg, and 135kg). General requirements mandate that ladders be manufactured with corrosion-resistant materials, have exposed metal surfaces free of sharp edges and burrs, and feature secure bolted, riveted, and welded connections. Manufacturers must ensure all structural components meet the specified dimensional and strength limits for their designated load tier. For extension ladders and single ladders, the standard dictates specific requirements for length, inside clear width, and minimum overlap between sections. It mandates the use of positive stops (limiters) rather than relying solely on pulleys to maintain safe overlap. Additionally, these ladders must be equipped with anti-slip ladder feet and end caps to prevent accidental sliding and protect users from sharp edges. For stepladders and combination ladders, the standard outlines requirements for length, inclination angles, and step depth. Stepladders must be equipped with metal spreaders or locking mechanisms to securely hold the ladder in its open working position. Combination ladders must comply with the structural requirements for both extension ladders and stepladders depending on their mode of use. The standard also details strict usage and maintenance guidelines. It specifies the proper 75-degree setup angle for leaning ladders, prohibits simultaneous use by more than one person, and mandates regular inspections for structural damage, especially after exposure to high temperatures or corrosive substances.

試験方法

The standard outlines a rigorous suite of testing procedures to verify structural integrity and user safety. For extension and single ladders, key tests include the horizontal bending strength test, deflection test, and inclined load test. It also mandates specific evaluations for hardware, such as the metal fittings load test, single lock load test, and rung torsion test. Ladders must pass the lateral bending and cantilever drop tests without exceeding permanent deformation limits. For stepladders, testing protocols include a pressure test, rail bending test, and step-to-rail shear strength test. Stability is evaluated through lateral, forward, and backward stability tests, as well as a torsional stability test. Stepladders must also undergo spreader and rail torsion tests to ensure the locking mechanisms hold securely under stress. Combination ladders must pass the respective tests for both their extension and stepladder configurations.

よくある質問

What products are regulated under GB 12142-2007?

GB 12142-2007 applies to portable metal extension ladders (two-section and three-section), single ladders, stepladders, and combination ladders used in various production activities. It is mandatory for manufacturers of these metal ladders.

Are there any updates from the previous version of GB 12142-2007?

The 2007 version merged the previous standards GB 12142-1989 and GB 7059.3-1986. It expanded the scope to include three-section extension ladders, single ladders, and combination ladders. It also introduced a rated load classification system and added multiple new structural testing requirements, such as rung torsion and rail cantilever tests.

How does GB 12142-2007 differ from ISO standards?

The standard adopts terms from GB/T 17889.1 but establishes specific, mandatory safety and testing criteria tailored for the Chinese market. Overseas manufacturers must ensure their products meet these specific GB testing thresholds rather than relying solely on ISO compliance for market access.

The summary above provides a high-level overview of GB 12142-2007. 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 12142-2007 today to access all detailed parameters, tables, and testing procedures.

適用のヒント

種別: 安全
CCS: C68
ICS: 13.100
所管部門: Ministry of Emergency Management
技術委員会: Ministry of Emergency Management