| We provide excellent scaffold consulting.
Due to a building’s geometry or its roof structural grid, one elevation
may require different length stages on the same roof. It is impractical
of an owner to purchase numerous stages or for a window-cleaning contractor
to bring different length stages to the same building. The custom designed
and fabricated stage is therefore often made to be modular, utilizing
stage sections that couple together in various lengths as needed for any
of the building’s roof top areas. To accomplish this, the stage
is constructed in modular lengths from as short as two feet to as long
as twenty feet. The stage’s end sections contain the power units
and the center sections pin together to create various lengths, like adding
leaves to a dining room table. Both the truss type and the ladder board
variety of stages can incorporate the modular design.
There are two basic varieties of powered hoists
used to lift and lower a powered work platform, the drum hoist or traction
hoist. All hoists used in the industry are “man rated”, requiring
a primary and secondary brake and an “over speed” protection
device. The drum hoist, powered by electricity, collects wire on a traditional
flanged drum located under or just behind the stage work area. The support
wire rope has its end clamped off to the flange for protection against
the rope accidentally spooling off the drum. |
