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Wind damage to eastbound deck overhang (photo taken 5/12/02). |
| Wind damage to eastbound deck overhang (photo taken on 5/12/02). |
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Wind damage to eastbound deck overhang (photo taken on 5/12/02). |
| Is it the fab four? From left: Brian Blair, Jensen Construction Co.; Doug McDonald, Iowa Department of Transportation; Mike Turk, Jensen Construction Co.; and Mike LaViolette, HNTB Corporation. |
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There are those who have and those who will -- almost everyone has been stuck in Hardin County mud at least once. |
| Deck forms are constructed using lumber and plywood. |
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Reinforcing steel is in place for the first concrete pour on the deck. |
| Reinforcing on the west approach span. |
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Welding shear studs to top flange of steel girders prior to placing deck concrete. |
| Removal of workpad and causeway at Pier 4. |
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Ironworkers tying Pier 6 backwall reinforcing. |
| Placing Pier 6 backwall concrete. |
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Stripping deck forms from beneath the eastbound roadway. |
| Concrete pump and pipeline used for placing eastbound deck concrete. |
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Concrete placer used to distribute concrete uniformly on deck surface. |
| Concrete finish machine screeds (scrapes off excess) concrete to the proper profile. |
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The contractor uses a ten-foot straight edge to check for high or low spots in the deck concrete. |
| The contractor uses a float to provide a "sealed" surface finish to the deck concrete. |
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A tine rake is used to provide surface roughness for bonding of the concrete wearing surface. |
| The new concrete surface is covered with two layers of wet burlap -- the top layer has a white poly coating. |
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Stripping "buggys" used for removing the deck forms following concrete placement. Note the large buggy (on the left) is used to strip between girders, while a smaller buggy (right) is used to strip the overhang area. |
| A closer view of the large deck stripping buggy. |
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Differential dead load deflection between bridges (eastbound concrete is in place; westbound has steel only). |
| Differential dead load deflection between bridges (both bridge decks now have concrete in place). |
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Final concrete pour on the deck of the eastbound bridge -- 7/27/02. |
| Looking northeast at form stripping on eastbound bridge. Decking is in place on the westbound bridge. |
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Looking southwest at form stripping on eastbound bridge. Decking is in place on the westbound bridge. |
| Looking northwest at form stripping on eastbound bridge. Decking is in place on the westbound bridge. |
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Looking south at form stripping on eastbound bridge. Decking is in place on the westbound bridge. |
| Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
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Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
| Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
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Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
| Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
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Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
| Placement of deck concrete on the westbound bridge beginning at 5:00 am on 7/26/02. |
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Concrete vibrating is a dirty job, but someone has to do it. |
| Iowa Department of Transportation Commissioners visited the site on 8/5/02. |
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Iowa Department of Transportation Commissioners visited the site on 8/5/02. |
