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The box girder normally comprises prestressed concrete, structural steel, or a composite of steel and reinforced concrete. The box is typically rectangular or trapezoidal in cross-section. Box girder bridges are commonly used for highway flyovers and for modern elevated structures of light rail transport.
The advantage to the pre-cast trench drain is again time savings—big time savings at the job site. Pre-cast trench drains made of a polymer concrete are also more sturdy and reliable than cast-in-place trenches. Once a trough is dug, the pre-cast trench sections can be installed and quickly be put into service through numerous methods.
A concrete girder bridge pier during construction prior to installation of the bridge deck and parapets, consisting of multiple angled pylons for support (bottom), a horizontal concrete cap (center), and girders (top) with temporary wood bracing. The substructure is made of multiple parts as well:
Yellow spray paint indicating below-street gas utility line (New York City, 2007) Telecommunication cable location marking Colored flags for utility locating Permanent water pipeline markers in Switzerland. Utility color codes are used to identify existing underground utilities in construction areas, to protect them from damage during ...
Combustible cable jackets may catch on fire and cable fires can thus spread along a cable tray within a structure. This is easily prevented through the use of fire-retardant cable jackets, or fireproofing coatings applied to installed cables. Heavy coatings or long fire-stops may require adjustment of the cable current ratings, since such ...
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A new Clean Label Project report suggests some protein powders contain heavy metals lead and cadmium. See which ones are safe here, plus what an expert advises.
Slab City, also called The Slabs, is an unincorporated, off-the-grid alternative lifestyle community [1] consisting largely of snowbirds [2] in the Salton Trough area of the Sonoran Desert, in Imperial County, California. It took its name from concrete slabs that remained after the World War II Marine Corps Camp Dunlap training camp was torn ...