structural steel erection, bolt, weld, fall protection, ironworker, construction, cranes, structural, tower crane, erection crane, tie off, lanyard, body harness, safety line, man lift, connectors, mobile, boom, wide flange, angle, column, girder, plate, camber, spud, wrench, turn, nut, truss, gusset, chord, Manitowoc, Grove, Link-Belt, rough, terrain, hook, JLG, coon, pipe, arc, shop, field, drawing, bridge, frame, hot, rolled, section
Bridge construction, steel construction: Erected prefabricated truss panels and transverse joists are being pushed across rollers on top of temporary bridge piers. Ironworkers standing on top of each temporary bridge pier watch process and signal superintendent with hand signals/ radio if there is reason to stop. They also unlock and lock rollers to allow movement when dozers push and to prevent movement thereafter. Tyngsborough, MA 2005.
Bridge construction, steel construction: Erected prefabricated truss panels and transverse joists are being pushed across rollers on top of temporary bridge piers. Ironworkers standing on top of each temporary bridge pier watch process and signal superintendent with hand signals/ radio if there is reason to stop. They also unlock and lock rollers to allow movement when dozers push and to prevent movement thereafter. Tyngsborough, MA 2005.
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