42’x45’ house building beam longitudinal section and cross section 2D drawing is given in this file. The cross section of the beam is 6’x12’. Totally 3 different size of the cross sections are given. In the 6’x12’ beam, 3 number of bars provided at the top and 3 numbers of bars provided at the bottom. In the 6’x9’ beam, 2 numbers of bars provided at the top and 2 numbers of bars provided at the bottom. In the 6’x8’ beam, 2 number of bars provided at the top and 2 numbers of bars provided at the bottom. For more details download the AutoCAD DWG drawing file from our cadbull website.