Warning Lines
When used to control access to areas where the leading edge and initial securing of metal deck and other operations connected with leading edge work are taking place, the controlled decking zone (CDZ) is defined by a warning line or by any other means that restricts access.
Warning Lines
Warning lines for a CDZ are erected not less than 6 feet (1.8 m) nor more than 90 feet (27.4 m) from the leading edge.
They extend along the entire length of the unprotected or leading edge and are approximately parallel to the unprotected or leading edge.
They are connected on each side to a guardrail system, wall, stanchion or other suitable anchorage.
Warning lines consist of ropes, wires, tapes, or equivalent materials, and supporting stanchions as follows:
- Each line is rigged and supported in such a way that its lowest point (including sag) is not less than 39 inches (1.0 m) from the walking/working surface and its highest point is not more than 45 inches (1.3 m) from the walking/working surface.
- Each line has a minimum breaking strength of 200 pounds (90.8 kg).
Knowledge Check Choose the best answer for the question.
5-4. What is the minimum and maximum distance a controlled decking zone (CDZ) warning line can be erected from a leading edge?
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