Onoff Posted July 9, 2020 Author Share Posted July 9, 2020 12 minutes ago, Nickfromwales said: You don’t use the FB’s throughout! steel across the garage door opening, one FB mid span and then timbers between. Looking at the pic, why not just use steel T section and then span from centre out? A big, central steel (red), off the the existing (red) RSJ across the opening was my initial thought. Then new, deeper (black) beams was the plan. I know the concept but have no ideas how to calc the sizes. Link to comment Share on other sites More sharing options...
Nickfromwales Posted July 9, 2020 Share Posted July 9, 2020 (edited) As per my PM, I think sistered 5x2 C24 glued and construction-screwed to the existing will be crazy strong. You could even add perpendicular timbers behind the uprights like strong backs. Edited July 9, 2020 by Nickfromwales Link to comment Share on other sites More sharing options...
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