My building project (which fortunately is only in the planning stage) has completely come to a halt.
I want to build a type of barn building measuring 5.5 x 14 meters where the first 7 meters will be a garage with storage on the upper floor and the other 7 meters will be kind of an office with a sleeping loft on top.
After a bit of googling, it became clear that a truss framework is needed because I want to maximize the use of space. Additionally, it must be self-supporting, as I want to have a carport on one gable and be able to drive a car in.
So I call a truss manufacturer and ask for the following:
Truss framework, span 5360 mm, angle 41 degrees, 400 mm raised truss foot, snow load zone 1.5, corrugated metal roof.
The truss manufacturer informs me that it's not possible to achieve this freestanding with construction timber. A support in the middle, like a glulam beam, is needed, which is quite massive (I think he said 220 mm). He has calculated based on 1200 mm centers between the trusses.
Then I talk to the carpenter who says it should absolutely be no problem, as he built a similar project a while ago that was a bit wider and without either a glulam beam or a supporting inner wall. However, he said they placed horizontal beams with 400 mm centers between the trusses...
Could it be that the truss designer only calculated for 1200 mm trusses and thus couldn't achieve the required load-bearing capacity, whereas if I had said I could add additional beams between the trusses, it would have been okay?
Otherwise, I don't understand how one can get such different information. There are lots of barns with storage lofts where I live and I'm quite sure none of them have a middle support...
I am planning a garage project of 6x8m where I need to have an HEB140 under the rafters 1200mm in to accommodate c24 220mm + a column somewhere around the middle.
I thought an HEB beam might be good to hang a trolley for a hoist on
I'm placing the beam underneath instead of inside.
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