Laborer, Prestressed Concrete
Overall rating: (N/A)
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Performs any combination of following duties involved in
preparing forms and pouring concrete to make prestressed
structural beams: Cleans forms, using hammer, scraper, and
brush, and sprays form with oil to prevnet adhesion of concrete.
Places reinforcing steel cage in form, using power wnich.
Pushes
stressing cables through form, threads ends through guide holes
in end plates, and clamps end of cables to plate. Tightens nuts
at base of form with power wrench, and inserts spacer bars and
locking pins at intervals along top of form to maintain
specified dimensions of form. Clamps vibrators in holders on
sides of forms. Lays planks on protruding ends of spacer bars to
make elevated walkway on both sides of form. Lifts four-wheeled
pouring buggy into position on walkway, using wicnh. Lifts belt
conveyor into position between pouring buggy and ready-mix truck
with winch and bolts it to truck, using power wrench. Starts
conveyor and vibrators.
Shovels sample of concrete into
canisters and tests consistency of concrete, using cone-shaped
mold and trowel.
Pushes pouring buggy along walkway to follow
ready-mix truck. Settles concrete at top of form with hand
vibrator, and fills low spots with concrete taken from conveyor.
Removes froms from cured beams, using handtools, and cuts
protruding end of stressing cable, using oxyacetylene torch.
Lifts beam, using four-wheeled portable hoist (hoisting buggy),
and moves hoist to yarding area by hand or with truck.
May
prepare forms and cast concrete lintels.
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Laborer, Prestressed Concrete
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