12,100 views ·
27 replies
12k views
27 replies
Diagonal braces or not?
I would definitely reinforce it in some way. Suggestively with metal straps stretched behind the panel on the inside. Since metal straps only provide support in one direction (tension), you need to set a cross.
What @Janus82 writes is definitely not true. Such a construction does not have the same stability at all as a construction with cross bracing or board material, there is a big difference even. That being said, it doesn't mean it wouldn't work anyway, but cross bracing is definitely preferable.
What @Janus82 writes is definitely not true. Such a construction does not have the same stability at all as a construction with cross bracing or board material, there is a big difference even. That being said, it doesn't mean it wouldn't work anyway, but cross bracing is definitely preferable.
If it is a wall standing completely alone by itself, then braces absolutely (metal bands as suggested above).
If it is four identical walls assembled into a building, with roof trusses, plywood, and felt/shingles, then braces are overkill (but not bad at all). So it depends on the whole structure, I would say.
If it is four identical walls assembled into a building, with roof trusses, plywood, and felt/shingles, then braces are overkill (but not bad at all). So it depends on the whole structure, I would say.
It is a complete building, with four walls, roof, and floor.Bowser said:
If it's a wall standing completely alone by itself, then diagonal braces are absolutely necessary (metal bands as suggested above).
If it's four identical walls assembled into a building, with roof trusses, roof decking, and felt/tiles, then diagonal braces are overkill (but not bad at all).
So it depends on the whole structure, I would say.
Member
· Blekinge
· 10 117 posts
The current structure is not stable and should preferably have some form of reinforcement, such as diagonals, straps, or panels. The need for this increases if the house is located in an exposed area, such as on Öckerö, where wind loads are a real problem. Old houses with plank frameworks rarely had diagonals or panels in the walls, but were still stable due to extensive skew nailing in the tongue and groove using very large nails, hardly an option in this case.
Then it will be braces. Will 28*70 embedded in the frame be good? Is it enough to brace from the right edge, or is it needed from two directions? Is it sufficient to brace over two or three bays? Does it matter if I brace on the outside or inside?J justusandersson said:The current construction is not stable and should preferably have some form of reinforcement, diagonals, bands, or sheets. The need for this increases if the house is in an exposed location, such as on Öckerö, where wind loads are a real issue. Old houses with plank frames seldom had diagonals or sheets in the walls, but were still stable through extensive skew nailing in the tongue and groove with very large nails, hardly an option in this case.
Member
· Blekinge
· 10 117 posts
28x70 works fine if you mount them on their side, otherwise, I suggest 45x70. With such short wall lengths, it's enough to brace one section per side. Collect the braces to two corners and let them have opposite directions there.
No, but the best result occurs if the braces are recessed into the frame structure.L Lilak said:
Hmmm, look at that... I could swear that horizontal råspont on the inside and panel on the outside provided sufficient stiffness in the construction equivalent to sheathing. Is råspont so much worse than, say, OSB?
Member
· Blekinge
· 10 117 posts
Curious follow-up question... in this case, it was horizontal cladding... if you instead use vertical cladding with, say, 28x70 as battens across the stud frame, will it provide sufficient rigidity? Admittedly, there might be about 5 planks at that wall height... but it's always something.
To provide some rigidity against wind loads, either some kind of panels or braces are needed. It's simply not possible to achieve a rigid construction with timber at 90-degree angles to each other.
That's why slightly older timber frame houses from before the era of panels generally have diagonal planking on the outside behind the weatherboarding (which some call cladding).
Houses made of vertical logs are generally pegged to achieve the same panel effect.
I don't believe in band irons as braces. We braced a shed that way once, and the band irons slacken in warm weather so much that they don't serve their purpose as they should.
That's why slightly older timber frame houses from before the era of panels generally have diagonal planking on the outside behind the weatherboarding (which some call cladding).
Houses made of vertical logs are generally pegged to achieve the same panel effect.
I don't believe in band irons as braces. We braced a shed that way once, and the band irons slacken in warm weather so much that they don't serve their purpose as they should.
Member
· Västerbottens län
· 18 051 posts
It is possible to install råsponten on the inside on the diagonal, slanting as it braces very well.
Protte
Protte
