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We use various cleaning and washing equipments. A transportable davit
is one that is relocated from one position to a new position around the
building’s roof, from roof level to roof level, or to an entirely
new building. A single piece davit combines the arm and mast in the common,
inverted “L” shape. The two-piece davit separates the arm
from the mast for ease of relocating the davit around the roof. This concept
permits easy access through tight areas and reduces the weight to be carried
by one man.
Tilt-up davits permit the operator to position
the davit over its base or socket, insert one pin (for attachment), then
lift the arm and mast to their upright position then set the second pin.
Davits that are erected in their complete “L” shape are required
by Federal Labor Codes to be of the tip-up variety. By pinning the davit
to the base before tip-up, the operator is sure of a firm foundation to
push against and thus sure that the davit will not fall over the parapet.
Note that a great majority of davit operations occur on or adjacent to
the building’s parapet. If the davit is simply inserted vertically
into a pipe sleeve, it is quite possible for the user’s hands to
slip from the davit mast, allowing the entire assemble to fall. Since
the davit’s repositioning is all to often attempted with rigging
lines still attached and with the arm outboard, a slip could mean a davit
falling the height of the building. Recently published safety standards
restricted the weight a man must lift in an effort to erect or move a
davit. Davits exceeding the weight limit, or those davits with long, cumbersome
arms, should be equipped with a davit jack or hoist. As a mechanical tool,
often a light duty manual hoist or sometimes a screw jack, the davit jack
is an inexpensive, usually portable, device that save the “backs”
of operators who must repeatedly tip up and lower heavy davits.
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