(1)All contractors
and owners, when constructing buildings in cities where the plans and
specifications require the floors to be arched between the beams thereof or where
the floors or filling in between the floors are of fireproof material or brick work,
shall complete the flooring or filling in as the building progresses to not less than
within three tiers of beams below that on which the iron work is being erected. If the
plans and the specifications of the buildings do not require filling in between the
beams of floors with brick or fireproof material, all contractors for carpenter work
in the course of construction shall lay the underflooring thereof on each story as
the building progresses to not less than within two stories below the one to which
the building has been ere
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(1) All contractors
and owners, when constructing buildings in cities where the plans and
specifications require the floors to be arched between the beams thereof or where
the floors or filling in between the floors are of fireproof material or brick work,
shall complete the flooring or filling in as the building progresses to not less than
within three tiers of beams below that on which the iron work is being erected. If the
plans and the specifications of the buildings do not require filling in between the
beams of floors with brick or fireproof material, all contractors for carpenter work
in the course of construction shall lay the underflooring thereof on each story as
the building progresses to not less than within two stories below the one to which
the building has been erected.
(2) Where double floors are not to be used, the contractor shall keep the
floor planked over not less than two stories below the story where the work is being
performed. If the floor beams are of iron or steel, the contractor for the iron or steel
work of building in course of construction, or the owners of such building, shall
thoroughly plank over the entire tier of iron or steel beams on which the structural
iron or steel work is being erected except such spaces as may be reasonably
required for the proper construction of such iron or steel work and for the raising or
lowering of materials to be used in the construction of the building or such spaces
as may be designated by the plans and specifications for stairways and elevator
shafts. If elevators, elevating machines, or hod-hoisting apparatus are used within a
building in the course of construction for the purpose of lifting materials to be used
in the construction, the contractors or owners shall cause the shafts or openings in
each floor to be enclosed or fenced in on all sides by a barrier at least eight feet in
height; except on two sides, which may be used for taking off and putting on
materials, and those sides shall be guarded by an adjustable barrier not less than
three nor more than four feet from the floor and not less than two feet from the
edge of the shaft or opening. If a building in course of construction is five stories or
more in height, no lumber or timber needed for such construction shall be hoisted
or lifted on the outside of the building.