Injury Illness Prevention Plan - Flipbook - Page 30
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Revised: October 2023
o Except for the cutting of holes in floors for chutes, holes through which
to drop materials, preparation of storage space, and similar necessary
preparatory work, the demolition of exterior walls and floor
construction shall begin at the top of the structure and proceed
downward, and each story of exterior wall and floor construction shall
be removed and dropped into the storage space before commencing
the removal of exterior walls and floors in the story next below.
o Any openings cut in a floor for the disposal of materials shall be no
larger in size than 25 percent of the aggregate of the total floor area,
unless the lateral supports of the removed flooring remain in place.
Floors weakened or otherwise made unsafe by demolition operations
shall be shored to safely support the intended imposed load from
demolition operations.
o Flooring boards may be removed from not more than one floor above
grade to provide storage space for debris, provided falling material is
not permitted to endanger structural stability.
o When wood floor beams serve to brace interior walls or free-standing
exterior walls, such beams shall be left in place until other equivalent
support can be installed to replace them.
Sections of walls shall not be allowed to fall upon floors supported by wood
joists or other floors unable to withstand such impact.
Walkways that meet code requirements shall be provided where necessary for
access.
Walking across exposed floor joists, steel beams, or girders is prohibited.
All persons on demolition projects shall be protected from falling material at
employee entrances to multi-story structures being demolished, by sidewalk
sheds or canopies or both, providing protection extending from the face of the
building for a minimum of 8 feet. All such canopies shall be at least two feet
wider than the building entrances or openings (one foot wider on each side
thereof) and shall be capable of sustaining a load of 150 pounds per square
foot.
Exterior wall openings on all floors shall be protected to a height of not less
than 42 inches, except on the ground floor and the floor being demolished.
o Where a hazard exists from fragmentation of glass, all glazed openings
shall be removed at least one floor below the working level.
No wall section, which is more than one story or 12 feet in height, shall be
permitted to stand alone without lateral bracing, unless a civil engineer,
currently registered in California, has submitted engineering data to the DIR
substantiating the capability of the wall to stand without lateral support.
o All walls shall be left in a stable condition at the end of each workday.
Steel construction shall be dismantled column length by column length, and
tier by tier (columns may be two-story lengths.) Any structural unit being
dismantled shall not be overstressed.
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