Planning to build a sunroom over the current deck between the house and garage according to the section drawing below.
After checking the Swedish wood guide, with my snow-zone 2, I concluded that laminated beams of 90x225mm are needed. But how do I attach them to the facades in a nice way?
I can think of three options A: Simply place the laminated beams on a 45*90 (or similar) that is screwed into the walls. Simple solution but not very nice, especially against the house where space is limited. B: Screw 45*220 (or similar) against the facades and hang the laminated beams in joist hangers, thinking of inward ones to avoid seeing ugly joist hangers. C: Similar to alternative A, with the difference of cutting into the laminated beams to get the rule at the same level as the laminated beams. But I assume that would result in a weak construction?
I sketched the proposals below to clarify my thoughts:
Does this excellent forum have any good input on the matter?
purely spontaneously option A but it may not be the most aesthetically pleasing solution but definitely the one that construction-wise requires the least calculation and knowledge.
spontaneously option A, but it might not be the most aesthetic solution, yet definitely the one that requires the least calculation and knowledge in terms of construction.
A reasonably solid support beam properly attached to the facades/framework of the buildings will handle this. There will be quite a lot of snow load when it's wet snow, but if you realize that and perhaps shovel away the worst, then it's not a problem. Now, it's about a glazed outdoor area and not a living space, so I would have considered that in my calculations... absolutely, damage can occur during a really harsh winter, but I would have accepted that. If you want to keep the size of the glued laminated timber at a slightly "nicer" level, then winter supports are an option. I have a friend who every autumn props up a beam with supports underneath just because otherwise, the beams would have been ridiculously large on a roof with a low pitch.
A decently robust beam properly attached to the façades/framework of the buildings will handle this. There will be a lot of snow pressure when it's wet snow, but if you are aware of this and perhaps shovel away the worst, it shouldn't be a problem. Now it's about a glazed outdoor section and not a living area, so I would have factored that into my calculations. Absolutely, damage can occur in an unfavorable winter, but that's something I would have considered. If you want to maintain a more "aesthetic" level for glulam, then winter supports are an alternative. I have a friend who every autumn props up a beam with supports underneath just because otherwise, it would have been grotesque beams on a roof with a low slope..
I imagine that 90x225 should suffice without needing supports on the inside.
With Alt B, how much can joist hangers really handle? Can't find good information about it, but it might be a non-issue and they can easily handle what's required.
Option C is obviously the right choice for me. If you don't take out more than 90 at the bottom of the linträ beams, it should work without any issues.
Someone with more than just a feeling is welcome to weigh in too. For example, @justusandersson
My beams are resting on the joists in the attic, that is, I've gone through the wall and secured and relieved them inside the attic. Not my construction, but the carpenters I hired to erect the framework chose that solution.
My beams rest on the rafters in the attic, meaning I have entered through the wall and attached and supported them inside the attic. It wasn't my design; the carpenters I hired to erect the frame chose that solution.
Unfortunately, there probably isn't room for that here as I see it right now, but I'll definitely check how it looks once I remove the existing panel. However, the question remains on how to resolve it on the side facing the garage.
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pacman42 said: