Roof Sailing Rigging and Line Systems

Question 1

Which knot is most commonly used to secure a lifeline to a fixed anchor point on a roof?

Accepted Answer

Bowline

Answer

The bowline creates a fixed loop that will not slip or tighten under load, making it the standard knot for securing lifelines to anchor points.

Question 2

What is the minimum working load limit (WLL) rating required for a personal fall arrest anchor point under OSHA standards?

Accepted Answer

5,000 lbs per worker attached

Answer

OSHA 1926.502 requires that anchor points for personal fall arrest systems be capable of supporting at least 5,000 lbs per worker attached.

Question 3

Which type of rope is preferred for roof rigging systems due to its high strength-to-weight ratio and low stretch characteristics?

Accepted Answer

Kernmantle static rope

Answer

Kernmantle static rope has a braided core (kern) protected by a woven sheath (mantle), providing high strength, low elongation, and excellent abrasion resistance for rigging.

Question 4

When inspecting a rope for continued use, which defect would require immediate removal from service?

Accepted Answer

Core damage visible through the sheath

Answer

Any damage to the rope's core visible through the sheath means the primary load-bearing structure is compromised, and the rope must be retired immediately.

Question 5

A prusik hitch is used in roof rigging systems primarily for which purpose?

Accepted Answer

As a friction hitch that grips under load but slides when unweighted

Answer

A prusik hitch is a friction hitch that locks onto the rope when loaded (as in a fall) but can be slid along the rope when unweighted, making it useful for ascent/descent and positioning.

Roof Sailing Practice Test

Roof Sailing Practice Test

Roof Sailing Rigging and Line Systems