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Img3019
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Item Code: 1272
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At a total length of 1,175 ft (358 m), this is the longest totally jointless, integral abutment bridge in the United States. The fully continuous structure is composed of nine precast, prestressed bulb-T beams with spans ranging from 127 to 138 ft (38.8 to 42.2 m). The two-column pier bents vary in height from 51 to 91 ft (15.5 to 27.7 m). There are no expansion bearings. Thermal expansion and contraction for this curved structure is accommodated solely through translation of its supporting piers and abutments. 1998 PCA award.
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Img3010
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Item Code: 1263
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The bridge consists of twin structures 4,566 ft (1,392 m) long with spans ranging from 196 to 260 ft (60 to 79 m). The bridge was built using precast single cell concrete box segments. Each segment is typically 61 ft (18.6 m) wide, 11 ft (3.35 m) deep and weighs 70 tons (63.5 tonnes). The superstructure has a cast-in-place section over the pier, which provides a fixed monolithic connection between the deck and the columns. The fixity at the piers afforded several advantages. It helped simplify construction, eliminated bearings, helped distribute the 2,000 kip (8.9 MN) vessel impact load throughout the structure, and added aesthetic value. 1998 PCA award.
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Img3001
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Item Code: 1254
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The five-span arch bridge was designed to minimize its bulk and intrusion on the adjacent historic Diestelhorst Bridge constructed in 1915. This cast-in-place concrete structure with 14-ft-long (4.3-m) deck overhangs is post-tensioned. While the new bridge is similar in style to the adjacent historic bridge, careful attention to structural, architectural and lighting details highlight the difference between designs done in the early and late 1900s. 1998 PCA award.
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Img3021
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Item Code: 1274
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This bridge is an essential link providing the only year-round access to a remote community of 100 people. The 165 ft (50.3 m) single-span structure consists of six precast, prestressed concrete decked bulb tees. Each integral, full-depth deck is 5 ft (1.5 m) wide. Due to lack of any alternative winter access route to the community and to provide immediate access for medical and other emergencies, the entire project, from design to construction of the bridge, was completed in nine months.
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Img3012
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Item Code: 1265
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World's longest movable bridge.The bridge is a 930 ft (283.5 m) floating concrete pontoon, consisting of three precast sections, each 310 ft (94.5 m) long and weighing 5,500 tons (5,000 tonnes). The individual sections were launched by controlled sinking of their carrying barges and then post-tensioned together. The Navy’s concerns for durability of the bridge structure in the salt water environment were addressed with an extensive menu of precautions, the most important being the use of high performance concrete and rebars coated with a new, tougher type of epoxy. 1998 PCA award.
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Img3013
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Item Code: 1266
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World's longest movable bridge.The bridge is a 930 ft (283.5 m) floating concrete pontoon, consisting of three precast sections, each 310 ft (94.5 m) long and weighing 5,500 tons (5,000 tonnes). The individual sections were launched by controlled sinking of their carrying barges and then post-tensioned together. The Navy’s concerns for durability of the bridge structure in the salt water environment were addressed with an extensive menu of precautions, the most important being the use of high performance concrete and rebars coated with a new, tougher type of epoxy. 1998 PCA award.
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Img3016
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Item Code: 1269
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Concrete, with its flexibility to accommodate special features, was the material of choice for this bridge located in the National Historic District town of Mantorville, MN. Architectural treatments include form liners to replicate limestone block masonry, sawtooth pattern on the concrete railing parapets and large concrete columns topped with precast concrete capitals. 1998 PCA award.
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Img3018
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Item Code: 1271
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This continuous 1,345 ft (410 m) cast-in-place concrete frame is made up of eight spans including six interior spans of 177 ft (54 m) each. The single cell box girders are supported by single column bents consisting of 7 ft (2.1 m) octagonal columns atop 8 ft (2.4 m) diameter piles. Two cast-in-place prestressed concrete frames are linked together with a reinforced concrete closure span to create the 1,345 ft (410 m) continuous structure. 1998 PCA award.
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Img3011
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Item Code: 1264
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This is a bread-and-butter type of bridge involving three 80 ft (24.4 m) spans over a main thoroughfare. Site constraints and speed of construction dictated use of prestressed concrete girders. This is one of the Federal Highway Administration’s demonstration projects incorporating high performance concrete in bridge structures. 1998 PCA award.
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Img3014
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Item Code: 1267
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This 15-ft-wide (4.6-m), 9-ft-high (2.7-m) and about 100-ft-long (30.5-m) bridge is located in the heart of downtown Boise and surrounded by architecturally detailed and historically significant structures. The contractor chose cast-in-place concrete alternative for cost effectiveness and for ease of incorporating special architectural treatments. 1998 PCA award.
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Img3020
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Item Code: 1273
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At a total length of 1,175 ft (358 m), this is the longest totally jointless, integral abutment bridge in the United States. The fully continuous structure is composed of nine precast, prestressed bulb-T beams with spans ranging from 127 to 138 ft (38.8 to 42.2 m). The two-column pier bents vary in height from 51 to 91 ft (15.5 to 27.7 m). There are no expansion bearings. Thermal expansion and contraction for this curved structure is accommodated solely through translation of its supporting piers and abutments. 1998 PCA award.
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Img3022
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Item Code: 1275
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This bridge is an essential link providing the only year-round access to a remote community of 100 people. The 165 ft (50.3 m) single-span structure consists of six precast, prestressed concrete decked bulb tees. Each integral, full-depth deck is 5 ft (1.5 m) wide. Due to lack of any alternative winter access route to the community and to provide immediate access for medical and other emergencies, the entire project, from design to construction of the bridge, was completed in nine months.
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Img3002
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Item Code: 1255
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This 15-ft-wide (4.6-m), 9-ft-high (2.7-m) and about 100-ft-long (30.5-m) bridge is located in the heart of downtown Boise and surrounded by architecturally detailed and historically significant structures. The contractor chose cast-in-place concrete alternative for cost effectiveness and for ease of incorporating special architectural treatments. 1998 PCA award.
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Img3003
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Item Code: 1256
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World's longest movable bridge.The bridge is a 930 ft (283.5 m) floating concrete pontoon, consisting of three precast sections, each 310 ft (94.5 m) long and weighing 5,500 tons (5,000 tonnes). The individual sections were launched by controlled sinking of their carrying barges and then post-tensioned together. The Navy’s concerns for durability of the bridge structure in the salt water environment were addressed with an extensive menu of precautions, the most important being the use of high performance concrete and rebars coated with a new, tougher type of epoxy. 1998 PCA award.
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Img3004
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Item Code: 1257
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This continuous 1,345 ft (410 m) cast-in-place concrete frame is made up of eight spans including six interior spans of 177 ft (54 m) each. The single cell box girders are supported by single column bents consisting of 7 ft (2.1 m) octagonal columns atop 8 ft (2.4 m) diameter piles. Two cast-in-place prestressed concrete frames are linked together with a reinforced concrete closure span to create the 1,345 ft (410 m) continuous structure. 1998 PCA award.
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Img3006
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Item Code: 1259
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This bridge is an essential link providing the only year-round access to a remote community of 100 people. The 165 ft (50.3 m) single-span structure consists of six precast, prestressed concrete decked bulb tees. Each integral, full-depth deck is 5 ft (1.5 m) wide. Due to lack of any alternative winter access route to the community and to provide immediate access for medical and other emergencies, the entire project, from design to construction of the bridge, was completed in nine months.
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Img3007
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Item Code: 1260
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This is a bread-and-butter type of bridge involving three 80 ft (24.4 m) spans over a main thoroughfare. Site constraints and speed of construction dictated use of prestressed concrete girders. This is one of the Federal Highway Administration’s demonstration projects incorporating high performance concrete in bridge structures. 1998 PCA award.
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Img3008
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Item Code: 1261
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The bridge consists of twin structures 4,566 ft (1,392 m) long with spans ranging from 196 to 260 ft (60 to 79 m). The bridge was built using precast single cell concrete box segments. Each segment is typically 61 ft (18.6 m) wide, 11 ft (3.35 m) deep and weighs 70 tons (63.5 tonnes). The superstructure has a cast-in-place section over the pier, which provides a fixed monolithic connection between the deck and the columns. The fixity at the piers afforded several advantages. It helped simplify construction, eliminated bearings, helped distribute the 2,000 kip (8.9 MN) vessel impact load throughout the structure, and added aesthetic value. 1998 PCA award.
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Img3023
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Item Code: 1276
Author:
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This bridge is an essential link providing the only year-round access to a remote community of 100 people. The 165 ft (50.3 m) single-span structure consists of six precast, prestressed concrete decked bulb tees. Each integral, full-depth deck is 5 ft (1.5 m) wide. Due to lack of any alternative winter access route to the community and to provide immediate access for medical and other emergencies, the entire project, from design to construction of the bridge, was completed in nine months.
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IMG15540
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Item Code: 5764
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Details of an uncorroded strand with increasingly pitted strand surfaces (clockwise from top left). Scale in inches; 1in. = 2.54 cm
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