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Industrial Fall Protection: Carabiners used for fall protection in industry (US) are

classified as "connectors" and are required to meet OSHA Standard 1910.66 App C
Personal Fall Arrest System which specifies "drop forged, pressed or formed steel, or
made of equivalent materials" and a minimum breaking strength of 22 kN (5,000 lbf).

ANSI/American Society of Safety Engineers Standard ANSI Z359.1-2007 Safety
Requirement for Personal Fall Arrest Systems, Subsystems and Components, section
3.2.1.4 requires that all connectors/ carabiners support a minimum breaking strength
(MBS) of 22 kN (5,000 lbf) and feature an auto-locking gate mechanism, which supports
a MBS of 16 kN (3,600 lbf).

Carabiners used for access in commercial and industrial environments within Europe
must comply with EN 362:2004 "Personal protective equipment against falls from a
height. Connectors." The minimum gate closed breaking strength of a carabiner
conforming with EN 362:2004 is 20 kN.

SCREW LINKS

Screw links provide a compact, lightweight alternative to
carabiners for a semi-permanent attachment. Maillon Rapide
(translates quick link), produced in France by the manufacturing
firm Péguet, have become the industry standard for highly
secure life-safety load connections in rescue. Inferior screw
links are commonly sold in hardware stores, which should
not be employed for rescue applications. The most common
screw link shapes employed for rescue include oval, demi-round
(D-shape) and delta (triangular). Maillon Rapide links (Figure
30), which are marked with the brand name, are constructed of
zinc plated steel, stainless steel, and zicral (aluminum and zinc Figure 31- Maillon Rapide
alloy). Do not exceed the working load limit (WLL) engraved in kg Shapes. © Petzl.

on the screw link (Figure 31). The screw link gate requires
numerous revolutions to close securely. For semi-
permanent connections, it may be tightened with a wrench
for security. They are designed to handle multi-directional
loading applications. Minimum breaking strength for all
shapes certified for climbing and mountaineering
applications (CE EN 362 and EN 12275) in the closed and
locked position; major axis 25 kN and minor axis 10 kN. Figure 30- Maillon Rapide. Rated
strength markings are visible on the
side of the product. © Péguet.

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