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My Construction Photos > Precast concrete construction, bridge constrruction: Kenworth truck tractor pulls a 120 ft long precast, pretensioned prestressed bridge girder from Grand Rapids, MI, to the Dixboro Bridge site. The red trailer with 3 axles supporting the far end of the girder is an Elk River Hydras Steer trailer attached to the end of the bridge girder. It includes steering, as demonstrated by its alignment to the left in photo, as well as brakes, all controlled by the truck driver in the pulling tractor, using control cables running on top of the girder from tractor to trailer. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

My Construction Photos > Precast concrete construction, bridge constrruction: Two Terex crawler mounted open web truss boom cable operated cranes lift 120 ft long precast, pretensioned prestressed bridge girder into place as bridge stringer. The red equipment in lower right-center is Elk River Hydras Steer trailer attached to right, rear end of bridge girder. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

My Construction Photos > Precast concrete construction, bridge constrruction: Side view of HydraSteer trailer supporting and attached to rear end of precast, prestressed bridge girder as truck and trailer back down to position bridge girder to be lifted into position on bridge piers. Trailer steering is powered by horizontal hydraulic pistons above wheels and fender on either side of trailer. Trailer steering and braking is controlled by the truck driver in the truck tractor, using control cables temporarily on top of the girder from tractor to trailer, shown here in middle of photo, dropping down to just bottom of girder above "Robinson Cartage" and continuing to the motor hanging from the trailer frame just to the right. The girder is tightly attached to trailer at several places by heavy chains fastened and tightened by come-alongs. Come-alongs are a type of lever with hook that can grab, pull, and hang on to any link of the chain, which makes the chain rigging adjustable in length and easily tightened. The photo inset is blowup of the 4 chains and come-alongs at the end of the beam. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

My Construction Photos > Precast concrete construction, bridge constrruction: Truck tractor backs down toward Huron River to spot/position 120 ft long precast, pretensioned prestressed bridge girder in position for the two Terex open web boom cranes (left center and mid-distance far right) to lift it iinto its permanent position on bridge piers. The red trailer/dolly at far end of girder with 3 axles attached to with chains and come-alongs and supporting the rear end of the girder is an Elk River HydrasSteer trailer, which has been steered to back the girder to the left and then straight down the hill. Trailer steering and braking is controlled by the truck driver in the truck tractor, using control cables running on top of the girder from tractor to trailer, shown here between two sets of chains, from top to bottom of girder. Foreman/superindent is walking down hill beside girder with radio in his left hand, to give direction to driver as needed. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

My Construction Photos > Precast concrete construction, bridge constrruction: Truck tractor backs up to spot
120 ft long precast, pretensioned prestressed bridge girderin position to be lifted into its permanent position on bridge piers. The red trailer in the foreground with 3 axles attached to with chains and come-alongs and supporting the rear end of the girder is an Elk River HydrasSteer trailer, which has been steered to back the girder to the right to back down the hill toward the Huron River. Trailer steering and braking is controlled by the truck driver in the truck tractor, using control cables running on top of the girder from tractor to trailer, shown here between two sets of chains, from top to bottom of girder. Marked on girder end is its designation on engineering. shop, and erection drawings, "#0414 5A33 SP 5 Washtnaw Co. Dixboro Rd Huron River." Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

My Construction Photos > Precast concrete construction, bridge constrruction: Truck tractors pulls
120 ft long precast, pretensioned prestressed bridge girders from Grand Rapids, MI, to the Dixboro Bridge site. On the left side is truck tractor supporting and pulling front end of bridge girder. On right are two truck tractor/Hydrasteer trailer combinations, ready for return trip to Grand Rapids. Each combination, with tractor supporting and towing one end of girder and trailer in rear supporting the other end of girder, brought a bridge girder that has been already been lifted into its final position on the bridge piers. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

Precast concrete construction, bridge constrruction: Kenworth truck tractor pulls a 120 ft long precast, pretensioned prestressed bridge girder from Grand Rapids, MI, to the Dixboro Bridge site. The red trailer with 3 axles supporting the far end of the girder is an Elk River Hydras Steer trailer attached to the end of the bridge girder. It includes steering, as demonstrated by its alignment to the left in photo, as well as brakes, all controlled by the truck driver in the pulling tractor, using control cables running on top of the girder from tractor to trailer. Dixboro Bridge over Huron River, Ann Arbor, MI, 2005.

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Keywords: bridge construction truck trailer tractor concrete equipment methods girder kenworth prestressed precast hydrasteer

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