Caterpillar 308C CR backhoe unloads manhole concrete formwork from trailer. Carpenter Rd, Ann Arbor, Michigan 2007.
Two workers lie down to place small plywood form on outside of exterior column to place concrete in gap between edge portions of precast hollow core floor slabs. Far worker is drilling through form into concrete to attach form to the concrete. The metal clasp at top is tied back to ensure the form does not fall if workers release it by mistake. A similar form is in place on the building corner to left of photo. Ashley Terrace, Ann Arbor, Michigan April, 2007.
Two workers lie down to place small plywood form on outside of exterior column to place concrete in gap between edge portions of precast hollow core floor slabs. The metal clasp at top is tied back to ensure the form does not fall if workers release it by mistake.  Ashley Terrace, Ann Arbor, Michigan April, 2007.
Placing basement/foundation wall concrete. Worker on right holds last section hose/tube to direct cast in place concrete into top of wall form, as boom lowers hose/tube into top of form. Worker on left is moving concrete vibrator to extend it down into freshly placed concrete to consolidate the concrete and bond successive concrete lifts. Wall forms are gang forms built from Peri Trio wall form panels lifted into position by crane. Mosher Jordan Renovation and New Dining Center, University of Michigan, Ann Arbor, March 2007.
Placing basement/foundation wall concrete. Concrete pump truck boom extends to right to place concrete in wall forms for basement/foundation wall. The pump truck and concrete ready mix trucks are hidden by pile of dirt that will later be used for backfill and landscaping. Mosher Jordan Renovation and New Dining Center, University of Michigan, Ann Arbor, March 2007.
Crane moves concrete wall gang form into position. Visual analysis of form structure shows it is pieced together from 8 form panels. Already in place are the opposing side of the forms, reinforcing steel, and form bulkhead. The bulkhead forms a temporary construction joint, against which the next concrete will be placed, after which the bulkhead is removed so the following concrete can be placed against the last concrete placed. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
Worker on forms at left is knocking form bolts loose to separate gang forms from concrete basement wall they cast. A worker walks along top of concrete basement wall more than 20 feet above the ground, among reinforcing bar tripping hazards, without all protection. He carries two safety lanyards and hooks, attached to full body harness and hooked temporarily at his right chest. Right foreground is Grove telescoping boom hydraulic crane. Michigan 2006.
Construction safety, fall protection: Worker supported by pipe on rear of gang form moves from one bay to the bay on its right, maintaining his fall protection by moving his two safety lanyard-hooks one at a time from his left side to his right. (He has moved from left of the blue-circled point to right of it.) Photo provides close-up view of galvanized steel (gray) turnbuckle columns that slope down from left to right, that can be rotated to push/pull form face against/away from the concrete. Michigan 2006
Two reinforcing ironworkers wire lower end of cable slings to reinforcing steel mat, with upper end wired to erection/lifting beam, for crane to lift and transport mat to build cast in place reinforced concrete basement wall. Ashley Terrace, Huron St, Ann Arbor, Michigan 2006
Caterpillar 308C CR backhoe unloads manhole concrete formwork from trailer. Carpenter Rd, Ann Arbor, Michigan 2007.
Caterpillar 308C CR backhoe unloads manhole concrete formwork from trailer. Carpenter Rd, Ann Arbor, Michigan 2007.
Caterpillar 308C CR backhoe unloads manhole concrete formwork from trailer. Carpenter Rd, Ann Arbor, Michigan 2007.
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