My Construction Photos > Piping construction: Caterpillar D5C XL crawler tractor with side mounted pipe layer boom and Deere 200C crawler mounted hydraulic backhoe support large bore steel underground steel pipe in trench with pipe slings. Workers are happy to help hold pipe in position. Dixboro Bridge, Ann Arbor, 2004
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section has been pulled up at its top into near vertical position to form section of outside wall of building. Wall section is heavily reinforced concrete that was cast in horizontal position on top of floor slab of building, which alleviated the need for wall forms. It is lifted by steel cable, hooked to wall at a 8 points to provide force sufficient to break wall free from the slab beneath it and lift it into its final vertical position. Two point support from lifting beams/ harness and pulleys provide independent support to each lifting point. Pipe with screw jacks at end align the wall and support it against wind forces. Workers 3, 5, and 6, from left to right, hold chain/cable with which they will jerk out pens locking the lifting cables to the slab wall, and they will next pull to withdraw pens to separate lifting tools from the wall. Phoenix, Arizona, November 2006.
My Construction Photos > Trench construction, safety: Caterpillar 3128 crawler mounted backhoe straddles trench for underground pipe. Worker in trench is fine grading/cleaning trench with shovel. Workers standing in 8 ft deep trench have no support against sidewall collapse. Safety and laws require the trench walls to be supported or sloped back at depths greater than 5 ft. Michigan 2006
My Construction Photos > Underground construction: Hyundai R55 crawler mounted hydraulic backhoe/excavator digs street drainage/ storm sewer trench.  Flexible corrugated sewer/ drainage tubing is coiled in trench. Sewer manhole structure is in foreground. Depot Street, Ann Arbor, 2004.
My Construction Photos > Concrete construction: Concrete is placed for bridge from lay-down concrete bucket supported by crane. Worker pulls down on pipe handle for concrete valve at bottom of bucket. Job built plywood concrete bounce/chute helps direct concrete to wall forms. Woodrow Wilson Bridge; Project; George Washington Street, Alexandria, Virginia, November 2006
My Construction Photos > Concrete construction: Concrete is placed for bridge from lay-down concrete bucket supported by crane. Worker pulls down on pipe handle for concrete valve at bottom of bucket. Workers in mid/foreground are installing cover on freshly placed concrete to protect it from rapid cooling and drying. Woodrow Wilson Bridge; Project; George Washington Street, Alexandria, Virginia, November 2006
My Construction Photos > Concrete construction: Concrete is placed for bridge from lay-down concrete bucket supported by crane. Worker pulls down on pipe handle for concrete valve at bottom of bucket. Job built plywood concrete bounce/chute helps direct concrete to wall forms. Woodrow Wilson Bridge; Project; George Washington Street, Alexandria, Virginia, November 2006
My Construction Photos > Precast concrete tilt-up construction: Reinforced concrete wall section is pulled up at its top into near vertical position to form section of outside wall of building. Wall section is heavily reinforced concrete that was cast in horizontal position on top of floor slab of building, which alleviated the need for wall forms. It is lifted by steel cable, hooked to wall at a 8 points to provide force sufficient to break wall free from the slab beneath it and lift it into its final vertical position. Two point support from lifting beams/ harness and pulleys provide independent support to each lifting point. Phoenix, Arizona, November 2006.
My Construction Photos > Earthmoving, underground, foundation construction: Horizontal, large diameter steel tubes/pipes are cross-lot braces that support side walls of excavation. The bracing system gets its name from bracing across the building lot, from one side to the other. Note that the bracing against the far wall is at both top and bottom of excavation. Budapest, Hungary July 2006.
Piping construction: Caterpillar D5C XL crawler tractor with side mounted pipe layer boom and Deere 200C crawler mounted hydraulic backhoe support large bore steel underground steel pipe in trench with pipe slings. Workers are happy to help hold pipe in position. Dixboro Bridge, Ann Arbor, 2004
My Construction Photos > Piping construction: Caterpillar D5C XL crawler tractor with side mounted pipe layer boom and Deere 200C crawler mounted hydraulic backhoe support large bore steel underground steel pipe in trench with pipe slings. Workers are happy to help hold pipe in position. Dixboro Bridge, Ann Arbor, 2004
Piping construction: Caterpillar D5C XL crawler tractor with side mounted pipe layer boom and Deere 200C crawler mounted hydraulic backhoe support large bore steel underground steel pipe in trench with pipe slings. Workers are happy to help hold pipe in position. Dixboro Bridge, Ann Arbor, 2004
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