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Q. Concrete cover to enhance fire resistance?
In the event of exposing concrete structures to a fire, a temperature gradient is established across the cross section of concrete structures. For shallow covers, steel reinforcement inside structures rises in temperature. In general speaking, steel loses about half of its strength when temperature rises to about 550oC. Gradually steel loses strength and this leads to considerable deflections and even structural failure in worst scenario. Therefore adequate cover must be provided for reinforced concrete structure as a means to delay rise in temperature in steel reinforcement.
Q. Air chamber vs. surge tank in pressurized pipelines? Air chambers and surge tanks are generally installed in water main to ease the stress on the system when valves or pumps
A -3.00% grade intersects a +1.25% grade at Sta. 85+80 and elevation 210.00 ft. A 350-ft vertical curve connects the two grades. Determine the station and elevation of turning po
Define the term- erection stresses The creep loss due to live load stress, erection stresses and other stresses of short duration may be ignored. The loss of prestress due to
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explain the principle of working from whole to part, as used in surveying
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A contractor has selected a W14x74 simply supported beam for a high rise construction project. The span length for the provided beam is set at 30 feet. The maximum factored appli
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