A rectangular pretensioned concrete beam is to be designed to carry superimposed dead and live loads of 300 plf and 1,000 plf, respectively, on a 40-ft simple span Straight tendons will be used. Time-dependent losses will be approximately 16 percent of the initial stress in the steel. Determine the concrete dimensions (use h = 2.5b ) and required prestress force and eccentricity, based on ACI limit stresses Concrete strength xi' = 5000 psi and f ci ^ prime =4,000 psi. 16 and service lis

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Design criteria for structural loading

The different loads such as loads due to self-weight (dead load) and external loads such as live load, wind loads, seismic load, snow load, and other loads and load combinations that influence the design of a building are called structural loading. The nature of the applied load differs from changes in the location, design, and type of materials used. The design criteria require that structures must be designed and constructed to be able to withstand all load types that are expected to act upon the structure and render its usage for the designated purpose. The structural members such as beams, slabs, columns, and foundations help the structure to withstand the applied load. There are different institutes such as ASCE and ACI that provide building design codes to assure minimum safety requirements and quality of the structures.