Article 4. Structural Steel Framed Buildings of California Labor Code >> Division 5. >> Part 3. >> Chapter 1. >> Article 4.

As used in this article "building" means any multifloor structural steel framed building more than two stories high in the course of construction.
As defined above, these provisions shall apply to buildings erected in tiers or stories and shall not apply to steel framed buildings having large open spans or areas such as, mill buildings, gymnasiums, auditoriums, hangars, arenas, or stadiums.
The derrick or working floor of every building shall be solidly decked over its entire surface except for access openings.
There shall be a tight and substantial temporary floor within two floors below and directly under that portion of each tier of beams on which erection, riveting, bolting, welding or painting is being done. For operations of short duration of exposure to falling, safety belts shall be required as set forth in Section 7265.
Temporary floors shall be wood planking of proper thickness, grade and span to carry the working load, but shall not be less than two inches thick, full size undressed.
Provision shall be made to secure temporary flooring against displacement by strong winds or other forces.
Planks shall extend a minimum of 12 inches beyond centerline of their supports at each end.
Wire mesh or plywood (exterior grade) shall be used to cover openings adjacent to columns where planks do not fit tightly.
Metal decking where used in lieu of wood planking shall be of equivalent strength and shall be laid tightly and secured to prevent movement.
Floor planks that are temporarily removed for any reason whatsoever shall be replaced as soon as work requiring their removal is completed or the open area shall be properly guarded.
Prior to removal of temporary floor plank, employees shall be instructed by assigned supervision the steps to be taken to perform the work safely and in proper sequence.
When gathering and stacking temporary floor plank on a lower floor, in preparation for transferring such plank for use on an upper working floor, the steel erector's personnel shall remove such plank successively, working toward the last panel of such floor, so that the work is always being done from the planked floor.
When gathering and stacking temporary floor planks from the last panel, the steel erector's personnel assigned to such work shall be protected by safety belts with life lines attached to a catenary line or other substantial anchorage.
The sequence of erection, bolting, temporary guying, riveting and welding shall be such as to maintain the stability of the structural frame at all times during construction. This applies to the dead weight of the structure, plus weight and working reactions of all construction equipment placed thereon plus any external forces that may be applied.
Where a building is being constructed in sections, each section constitutes a building as defined in Section 7250.
Safety belts and nets shall be required in accordance with Article 24 (commencing with Section 1669) of subchapter 4 of Chapter 4 of Part 1 of Title 8 of the California Administrative Code, Construction Safety Orders of the Division of Occupational Safety and Health.
No person shall proceed with any work assigned to or undertaken by him, or require or permit any other person to proceed with work assigned to or undertaken by either, unless the planking or nets required by this article are in place. Violation of this section is a misdemeanor.
The Division of Occupational Safety and Health shall enforce this article.