2005 California Labor Code Sections 7250-7267 Article 4. Structural Steel Framed Buildings

7250.  As used in this article "building" means any multifloor
structural steel framed building more than two stories high in the
course of construction.
7251.  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.
7252.  The derrick or working floor of every building shall be
solidly decked over its entire surface except for access openings.
7253.  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.
7254.  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.
7255.  Provision shall be made to secure temporary flooring against
displacement by strong winds or other forces.
7256.  Planks shall extend a minimum of 12 inches beyond centerline
of their supports at each end.
7257.  Wire mesh or plywood (exterior grade) shall be used to cover
openings adjacent to columns where planks do not fit tightly.
7258.  Metal decking where used in lieu of wood planking shall be of
equivalent strength and shall be laid tightly and secured to prevent
movement.
7259.  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.
7260.  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.
7261.  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.
7262.  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.
7263.  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.
7264.  Where a building is being constructed in sections, each
section constitutes a building as defined in Section 7250.
7265.  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.
7266.  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.
7267.  The Division of Occupational Safety and Health shall enforce
this article.