Calculate the peak bending moment for the roof beam
Show a clear, dimensioned FBD for the 2×10 rafters. For the 2×10 rafters calculate the peak moment in units of ft. lb. For the 4×10 roof beam, assume the 4×10 roof beam is pinned to the subsequent 10ft section over each of the interior 4×4 columns. Note that you must calculate the height of the short bearing wall to account for its self weight. Calculate the peak bending moment for the 4×10 roof beam. Then draw a clear dimensioned FBD for the two exterior bearing walls above the floor joists, no moment calcs here. Draw FBD’s for the simply supported 2×10 floor joists and identify the peak moments in units of ft. lb. Draw a FBD for the 6×10 floor beam assuming it is pinned to the subsequent 10ft 6×10 floor beam over the 6×6 posts. Calculate the reactions on an exterior and on a typical interior 6×6 post and calculate the typical peak bending moments in the 6×10 floor beams in units of ft. lb. Check whether or not the bearing pressure at each of the continuous concrete footings is less than or greater than the allowable pressure at 2000 psf. Calculate the actual pressure experienced.
