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My Construction Photos > Ironworker standing on scissor lift work platform tightens bolts with electric impact wrench that connect horizontal wide flange beam to vertical wide flange column. This connecting phase of structural steel construction, which follows the erection phase, consists of plumbing up the frame and installing permanent bolts/welds to complete the structural design and detailing connections. Ashley Terrace, Ann Arbor, Michigan April, 2007.

My Construction Photos > Steel frame supports horizontal rebars for cast in place concrete beam. Top steel is supported at proper height by a transverse rebar, and height can be adjusted by small chain fall. Top steel supports U stirrups, which can themselves support horizontal bottom steel. Note that steel rebar cage sags under its own weight and requires additional support along its length. Colorado Street, Denver, Colorado, December 4, 2006.

My Construction Photos > At far end, steel frame supports horizontal rebars for cast in place concrete beam. Top steel is supported at proper height by a transverse rebar, and height can be adjusted by small chain fall. Top steel supports U stirrups, which can themselves support horizontal bottom steel. Resteel sags under its own weight and needs additional support along its length. The resteel extends grade beams at near end, which has top steel exposed to bond to concrete slab floor. Colorado Street, Denver, Colorado, December 4, 2006.

My Construction Photos > Steel erection fall protection: Structural steel ironworker on left has fall protection from full body harness attached to safety lanyard attached to steel cable loop/sling around girder as he moves from left to right along wide flange structural steel girderl Here, he liftis cable loop/sling past steel plate attachment that will support far end of a steel floor beam/joist. Ironworker on right his apparently without fall protection, with one safety lanyard attached from cable loop/sling that hangs loose and other end attached to lower ring on his body harness. However, his second lanyard could be attached to a sliding beam flange anchor attached to top flange of girder. Ross School of Business, University of Michigan, Ann Arbor. January, 2007.

My Construction Photos > Steel erection fall protection: Structural steel ironworker straddles wide flange structural steel beam. Fall protection provided by full body harness attached to safety lanyard attached to steel cable loop/sling around beam. Ross School of Business, University of Michigan, Ann Arbor. January, 2007.

My Construction Photos > Precast concrete bridge construction: Precast post-tensioned concrete module, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped arch sections consist of hollow field-precast reinforced concrete segments (as shown in foreground) tied together by post-tensioned steel cables. Wood forms on top of pier are for cast in place pier cap and tie into two post-tensioned horizontal precast reinforced concrete tension tie beams that will carry the outward thrust of the two pier segments. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capital Beltway, I-95/I-495. November 2006.

My Construction Photos > You may use my construction photos free (without removing my signature) for educational / recreational / "light" commercial use. Note: People in the shots have NOT signed a model release.

All materials, including figures and text, are copyrighted by me and may not be used "in bulk" for commercial purposes or sales or on another web site without my express permission.

Robert I. Carr, Ph.D., P.E., 542 Heritage Drive, Ann Arbor, MI 48105, 734-665-8287, Fax 734-665-1737, www.RICarr.com, RICarr@RICarr.com. www.RICarr.com, RICarr@RICarr.com.

My Construction Photos > Cast in place concrete connection between top of pier and end of precast concrete tie-beam, which allows the tie-beam to act as tension member that ties the tops of the cantilever arched piers together. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.

My Construction Photos > Precast concrete top center module/segment/section for bridge pier, with steel reinforcing bars and long steel bolts protruding to be imbedded in cast in place concrete connection between precast concrete tie-beam and top of the pier. This segment is shown in place in other photos. Portions of the sides of the module are corrugated to provide resistance to sliding/shear relative to the modules at its side. In the background are portions of two precast concrete modules from which the piers are constructed. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.

Ironworker standing on scissor lift work platform tightens bolts with electric impact wrench that connect horizontal wide flange beam to vertical wide flange column. This connecting phase of structural steel construction, which follows the erection phase, consists of plumbing up the frame and installing permanent bolts/welds to complete the structural design and detailing connections. Ashley Terrace, Ann Arbor, Michigan April, 2007.

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Camera: Canon (Canon Eos 5d) |

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Keywords: building structure construction connections crane bolt april beam michigan steel column ironworker structural erect ann arbor ashley terrace wide flange impact wrench steel connecting

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