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Attempts have been made to increase the safety of bridges with pin and hanger assemblies by adding some form of redundancy to the assembly. Retrofits that add redundancy to pin and hanger assemblies include adding a "catcher's mitt"—a short steel beam attached to the bottom of the cantilevered girder that extends out beneath the suspended girder to "catch" the suspended girder should ...
This was used for the construction of the Maine State Route 103 bridge that crosses the York River. The seven-span 510-foot (160 m) long bridge was completed in 2010 as the first NEXT beam bridge. The second design was introduced in 2010 for Sibley Pond Bridge at the border of Canaan and Pittsfield, Maine. The design was called "NEXT D" with an ...
Stringer: Steel beam that ties caps together Top cap: Steel Beam Post: steel pipe or 12×12 lumber. Bottom cap: steel beam Wedge pack: 4×4 lumber cut into wedges for falsework adjustment, various lumber sizes include 2×6s and plywood Corbel: distribute load to pads. Typical material is 12×12 lumber and steel beams Pad: distribute load to ground.
Underslung (lower-beam) launching gantry used for Skyline guideway construction (2015). A launching gantry (also called bridge building crane, and bridge-building machine) is a special-purpose mobile gantry crane used in bridge construction, specifically segmental bridges that use precast box girder bridge segments or precast girders in highway and high-speed rail bridge construction projects.
Langley Covered Bridge, built in 1877, straddles the St. Joseph River and is the longest covered bridge in the state.
There were two types of beams used for the trusses on the bridge: glued laminated timber beams were slanted, while the steel beams were vertical; weathering steel was used. [165] [166] [167] Block shear failure, which caused overloading of other elements in the truss. 0 killed [168] [169] [170] Complete collapse Tretten Bridge on the day of the ...
Repair work on Big Sur's Highway 1 is expected to begin this week. ... barriers along the highway's center line and also added new temporary painted road lines to widen the northbound lane ...
Arching action forces in beam and slab bridge deck The strength enhancing effects of arching action in reinforced concrete floors were first recognised near the beginning of last century. [ 1 ] However, it was not until the full scale destructive load tests by Ockleston [ 2 ] [ 3 ] on the Old Dental Hospital in Johannesburg that the extent of ...