21.I.10 Restraint Systems.
Fall Restraint System
- Consideration must be made for use of fall restraint over fall arrest. Fall restraint systems prevent the user from reaching an area where a free fall could occur by restricting the length of the lanyard or by other means.
- The anchorage strength requirement for restraint systems must be 3,000 lbs (13.3 kN) or designed by a QP for two times the foreseeable force.
- Restraint systems can be used only on flat or low-sloped surfaces (less than or equal to 18.4º or 4:12 slope).
21.J Ladder-Climbing Devices (LCDs).
A LCD is a sleeve or cable/rope attached to a fixed ladder over 20 ft (6 m) in length.
21.J.01 Anchorage strength for LCDs must be a minimum of 3,000 lbs (13.3 kN).
21.J.02 The connector between the front D-ring of the harness and the ladder cable, rope or sleeve must be 9 in (20 cm) long.
21.J.03 The free fall distance when using a LCD must not exceed 2 ft (0.6 m).
21.J.04 There must be 100% transition at the top of the LCD for safe access to above work surface or roof.
- Note: Do not install LCDs on ladders that have 3/4 in (1.9 cm) rungs (off-the-shelf-ladders) unless the ladders are designed to withstand the fall forces.
21.K Scaffolds, Work Platforms and Elevating/Aerial Devices.
Suspended Scaffold
21.K.01 Scaffolds must be equipped with a standard guardrail per 21.F.01 or other fall protection systems.
21.K.02 For workers erecting and dismantling scaffolds, an evaluation must be conducted by a CP to determine the feasibility and safety of providing fall protection if fall protection is not feasible. An AHA detailing rationale for infeasibility of use of fall protection must be submitted and accepted by the GDA.
21.K.03 Suspended scaffolds.
- Single point or two point suspended scaffold: In addition to railings, workers must also be tied off to an independent vertical lifeline using a full body harness.
- Other suspended scaffolds (e.g. catenary, float, needle-beam, Boatswain chairs): PFAS is required and workers must be tied off to an independent vertical lifeline using a full body harness.
- A risk assessment must be performed when persons are supported on a multi-point adjustable suspended scaffold to evaluate the effectiveness and feasibility of the use of PFAS. Results must be documented in the AHA for the activity being performed. > See 21.I.05.
21.K.04 Self-Propelled Elevating Work Platforms (Scissor Lifts), per ANSI A92.6.
- Scissor lifts must be equipped with standard guardrails.
- In addition to the guardrail provided, the scissor lift must be equipped with anchorages meeting the ANSI Z359 Fall Protection Code.
- Note: Scissor lifts not equipped with anchorages are prohibited.
- A restraint system must be used in addition to guardrails. The lanyards, to include lanyards with built-in shock absorbers, used with the restraint system must be sufficiently short to prohibit workers from climbing out of, or being ejected from the platform.
- The use of a self-retracting device (SRD) is prohibited unless permitted by the SRD manufacturer and used in accordance with manufacturer's instructions.
- Workers are prohibited from climbing on or over the guardrails.
Knowledge Check Choose the best answer for the question.
21-11. In addition to railings, what is required for persons working on single point or two point suspended scaffolds?
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