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My Construction Photos > Northwest cable operated backhoe is extended to drop into soil to lift another shovel full. Historical Construction Equipment Association 2007 National Convention and Old Equipment Exposition, Zagray Farm Museum, Colchester, CT, July 21, 2007. Photo by Rip Carr
My Construction Photos > Koering cable operated backhoe. Historical Construction Equipment Association 2007 National Convention and Old Equipment Exposition, Zagray FarmMuseum, Colchester, CT, July 21, 2007. Photo by Rob Carr
My Construction Photos > Marine and communications construction: Deep ocean cable laying ship Global Sentinel layed the first fiber optic cable between the USA and Japan for AT&T. It is 475 ft (145 m), electrically driven from 2100 power generated by its three 12-cylinder diesel engines. Astoria, Oregon 2005.
My Construction Photos > As crane cable supports structural steel wide flange column section, structural ironworker inserts tapered end of bull pin into bolt holes in lower end of suspended column section and splice plate bolted to top of previously erected column section to hold, support the column section in position to splice it to top of column below.This adds to the support already provided by two inserted spud wrenches. The steel cable on lower column section is part of tensioned cable temporary diagonal bracing that supports the steel frame against lateral/ side loads until all connections have been completed. Ashley Terrace, Ann Arbor, Michigan April, 2007.
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.
My Construction Photos > Structural steel and precast concrete bridge construction: Precast post-tensioned concrete modular, tied cantilevered arch section bridge piers, described as V-piers, support structural steel bridge stringers/girders/beams. Sloped concrete arch sections consist of hollow field-precast reinforced concrete segments tied together by post-tensioned steel cables. Outward thrust of arch sections is supported by post-tensioned horizontal precast reinforced concrete tension tie beams. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
My Construction Photos > Construction of the cast in place concrete connection between one end of V-shaped bridge pier and one end of concrete tension beam, which ties two ends of bridge pier together to carry their outward thrust. The key element is the tightly grouped reinforcing steel in the center of the photo. Wood forms are being built around the reinforcing steel, and ready-mix concrete will be placed to fill the forms around the steel. After this concrete has gained its strength, the white-sleeve covered steel bolts will be tensioned to connect the tie beam to the bridge pier. A worker in the center of the photo gives an idea of scale of the construction. The top of the bridge pier consists of three sections of precast concrete connected together. These are easily differentiated in the lower right quadrant. These are tied together by post-tensioned long steel bolts whose ends are exposed here near the edge of the concrete section. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
My Construction Photos > Construction of the cast in place concrete connection between the ends of two precast reinforced concrete beams. This connection will make them a single reinforced concrete beam, which will then be post-tensioned to become the tension tie beam that carries the outward thrust of the cantilevered arches of a V-shaped bridge pier. The beam ends and this construction point are supported from the ground by a steel truss scaffold erection tower, of which we see only the top part. Wood forms will be built around the bottom and sides of the space between the two beams, into which ready-mix concrete will be placed. After this concrete has gained its strength, post-tensioning cables run through tubes the length of the two beams will be tensioned to create the post-tensioned tie beam. Woodrow Wilson Bridge replacement, Potomac River between Virginia and Maryland, Capitol Beltway, I-95/I-495. November 2006.
Northwest cable operated backhoe is extended to drop into soil to lift another shovel full. Historical Construction Equipment Association 2007 National Convention and Old Equipment Exposition, Zagray Farm Museum, Colchester, CT, July 21, 2007. Photo by Rip Carr
My Construction Photos > Northwest cable operated backhoe is extended to drop into soil to lift another shovel full. Historical Construction Equipment Association 2007 National Convention and Old Equipment Exposition, Zagray Farm Museum, Colchester, CT, July 21, 2007. Photo by Rip Carr
Northwest cable operated backhoe is extended to drop into soil to lift another shovel full. Historical Construction Equipment Association 2007 National Convention and Old Equipment Exposition, Zagray Farm Museum, Colchester, CT, July 21, 2007. Photo by Rip Carr
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