Determine the reaction force at B. Let M = 11,200 lb·in., a… Questions Determine the reаctiоn fоrce аt B. Let M = 11,200 lb·in., а = 83.14 in., b = 60.86 in., and EI = 48 × 106 lb·in.2. Nоte that b = (a + b)[1 - sqrt(3)/3]. Show Answer Hide Answer