Controlled Decking Zone (CDZ)
A Controlled Decking Zone is an area in which certain work may take place without the use of guardrail systems, personal fall arrest systems, fall restraint systems, or safety net systems and where access to the zone is controlled.
Leading Edge Work
A CDZ can be established as a substitute for fall protection where metal decking is initially being installed and forms the leading edge of a work area more than 15 and up to 30 feet above a lower level.
Leading-edge workers in a CDZ are required to:
- Be protected from fall hazards above 2 stories or 30 feet (whichever is less).
- Have completed CDZ training in accordance with 29 CFR 1926.761.
Employees who are not engaged in leading-edge work and properly trained in the hazards involved are prohibited from entering the CDZ.
The CDZ is required to:
- Be no more than 90 feet wide and 90 feet deep from any leading edge.
- Not exceed 3,000 square feet of unsecured decking.
- Have designated and clearly marked boundaries with control lines or the equivalent. Control lines are commonly used as a marker because they create a highly visible boundary.
- Have safety deck attachments placed from the leading edge back to the control line.
- Have at least two safety deck attachments for each metal decking panel.
Final deck attachments and the installation of shear connectors are prohibited from being done in the CDZ.
Knowledge Check Choose the best answer for the question.
5-3. Leading-edge workers in a CDZ are required to be protected from fall hazards above _____.
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