Hi Guys,

Im a chippy but im having trouble choosing a lintel size for an opening in my house. I have limited access to span tables that can help me. I have a door opening that i want to extend to 3.4m. The roof structure is of old hardwood construction with what seems to be early trusses every second rafter and a standard rafter in between. The wall supports ceiling joists, but i think that most of the support is via these 'trusses'. The only other load on the wall is a ridge strut which supports the valley end of a garage roof ( if that makes sense). Garage roof is supported by underpurlins etc so RLW is under 2m.

im willing to go hyspan beams or whatever if i have to, just dont have endless depth in the frame above the opening to work with.

Any help?


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