Computer application. Construction of an influence line for an indeterminate beam,( a) For the indeterminate beam shown in Figure P8.48, construct the influence lines for MA,RA, and RB by applying a unit load to the beam at 4-ft intervals to compute the corresponding magnitudes of the reactions.
( b) Using the influence line in part ( a), determine the maximum value of the reaction RB produced by two concentrated 20-kip wheel loads spaced 8 ft apart.
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