Working stress design method is a method used for the reinforced concrete design where concrete is assumed as elastic steel and concrete act together elastically where the relation ship between loads and stresses is linear assumptions of working stress design method plane section before bending will remain plane after bending. The assumptions in working stress method of design are the steel and concrete behaves as linear elastic material the design is carried out by the factor of safety of 3 for concrete cube strength and a factor of safety 1 8 for yield strength of steel . Jul 12 2020 by evan hunter best book assumptions in working stress method working stress design method is a method used for the reinforced concrete design where concrete is assumed as elastic steel and concrete act together elastically where the relation ship between loads and stresses is. Assumptions in working stress method the basic assumptions in wsm are plane section before bending will remain plane after bending the stress strain relationship will follow hookes law the tensile stress is taken by steel only the modular ratio is given by m 280 3cbc