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817 Steel Erection Safety
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Multi-Story Structures

Rules for steel erection safety for multi-level structures can be found in OSHA Standard 1926.754(b).

Golden Gate Bridge Safety

Permanent floors: Permanent floors must be installed as the erection of structural members progresses, with no more than 8 stories between the erection floor and the upper-most permanent floor.

Unfinished bolting or welding: Unfinished bolting or welding above the foundation (or the uppermost secured floor) is not permitted to exceed the lesser of:

  • 4 floors
  • 48 feet (14.6 m)

Exceptions are allowed where structural integrity is accounted for in the design.

Safety Nets and Floors: Safety nets or a fully planked or decked floor must be maintained directly under any erection work being performed, within the lesser of:

  • 2 stories
  • 30 feet (9.1 m)

Knowledge Check Choose the best answer for the question.

3-3. When erecting multi-level structures, how many stories are allowed between the floor being erected and the upper-most permanent floor?