DIY Network

Structural Ironworker Work continues on the convention center hotel. From "Trade School" episode DTRS-202

Apprentice Adelbert Huggins continues work on the convention center hotel. Adjacent to the curtain wall frames placed earlier, Adelbert and his crew now connect a series of iron I-beams that form the structural corner of the hotel.

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	Figure A
	Figure B

Basic Tools:

boom lift
tugger
chokers
safety harness
spud wrench
bolts
stick welder
laser
scope

beamerBecause a crane can't be utilized, the crew implements an intricate rigging system consisting of a tugger, cables and pulleys to hoist each heavy I-beam (figure A). Adelbert rigs the first I-beam using a steel choker, carefully selected for the proper weight capacity (figure B).

With the first I-beam rigged, Adelbert uses the boom lift to elevate into position to accept the hoisted beam (figure C). At 60 feet in the air, safety is paramount. Even within the confines of the lift cage, Adelbert is tied off at all times. The job of connecting frequently calls for an individual to sit, stand or walk out on the beams (figure D) to access the work. To stay safe, Adelbert attaches a beamer and his harness to an already secured I-beam (figure E).

Figure C

Figure D

Figure E

This rigging system of hoisting makes his job much more difficult. While a crane can move the I-beams into precise alignment, the tugger system is limited by the placement of the pulleys. As each beam is raised toward them, Adelbert and his partner must use raw strength to maneuver the first I-beam into position between a concrete column and an iron column (figure F).

A spud wrench is helpful in connecting the I-beams. It serves to align the connection holes together (figure G). When the holes are aligned, two bolts are inserted on each end of the beams, securing them in pre-fabricated holes into the I-beams (figure H).

Figure F

Figure G

Figure H

Adelbert and his partner continue this process until all the beams are raised. Later on, another crew will return to finish bolting and welding the I-beams in place.

RESOURCES :

Colorado Statewide Ironworkers JATC
Website: www.iw24jatc.com