an object subjected to a compressive stress is shortened. Compressive stress is also defined as the force per unit area and denoted by the symbol σ.Answer (1 of 8): This answer is from a net scource:The concrete minimum compressive strength will be specified by the client/designer in a specific format. An example of this is given below: C40/50. The 40 is the compressive requirement of 40 N/mm² of a crushed 100mm concrete cylinder and the 50 ...Compressive stress is defined in the same way as the tensile stress but it has negative values so as to express the compression since dL has the opposite direction. ( L is the length of the object.) Compression stress= - ( F/A) Where F= Force applied on the object. A= Area of cross section of the object. This engineering-related article is a stub.The compressive strength parameter of concrete is used in the design of concrete structures and when evaluating the condition of existing structures. It is a piece of information in construction,