Using this past information determine the elastic shortening in a simply supported double tee member and stress in the prestressing cables. The member has the following information: Span 9m, fc=40MPa, fci=25MPa, W=2.7kN/m², A=279,000mm², I=12600x106 mm. All strands are stressed to 70% of ultimate and are SWS 13 low relaxation strands (Es=190,000MPa), the Double Tee has a centroid location at 492mm measured from the bottom. The double Tee is 2.4m wide and 700mm tall. Each leg has 4 strands at 50mm apart (vertically) with the first being 100mm from the bottom of the leg
