1. The problem statement, all variables and given/known data 6. A steel beam is used in the road bed of a bridge. The beam is mounted between two concrete supports when the temperature is 23⁰C, with no room for thermal expansion. What compressional stress must the concrete supports apply to each end of the beam, if they are to keep the beam from expanding when the temperature rises to 42⁰C? Co-efficient of linear expansion for steel = 11 x 10-6K-1 Young’s modulus for steel = 210GN.m-2 2. Relevant equations deltaL/L=alpha deltaT F/A*=delta L/L*Y 3. The attempt at a solution Ive found delta L/L to be 2.09*10^-4 ive also done about a thousand other things but everything i try needs an original length, i feel like ive overlooked a simple step or something.... can someone please give me a hand.