is this timber roof horizontaly stable?
is this timber roof horizontaly stable?
(OP)
Hello. This is not my field so I hope for some help and suggestions.
My question: Is this timber roof horizontaly stable (in case of wind/earthquake forces)?
In longitud. direction I know this is stable since we have knee braces + sheating on top of rafters that transfer forces to longitudinal walls and RC slab.
But what in other direction? Walls are masonry + RC ties. I dont want any bracing between columns (in vertical plane) because I need space between.
In attached file:
rafters - brown
knee braces - red
column/post - blue
longitud. timber beam - yellow
collar tie - green



My question: Is this timber roof horizontaly stable (in case of wind/earthquake forces)?
In longitud. direction I know this is stable since we have knee braces + sheating on top of rafters that transfer forces to longitudinal walls and RC slab.
But what in other direction? Walls are masonry + RC ties. I dont want any bracing between columns (in vertical plane) because I need space between.
In attached file:
rafters - brown
knee braces - red
column/post - blue
longitud. timber beam - yellow
collar tie - green









RE: is this timber roof horizontaly stable?
If you raise the interior columns you get the classic Gabriel roof line.
Dik
RE: is this timber roof horizontaly stable?
Mike McCann, PE, SE (WA)
RE: is this timber roof horizontaly stable?
Kind of like this
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: is this timber roof horizontaly stable?
Nrx = number of support reactions = 4
Nl = number of closed loops = 4
Nh = number of hinges = 11
RE: is this timber roof horizontaly stable?
By bracing on an angle, it reduces the available floor space above... It can be worked to be a stable structure with vertical wall elements. Common timberframe 'barn' structure...
Dik
RE: is this timber roof horizontaly stable?
I meant between the green beam and the brown beam in the OPs original post (not the knee brace on the post). I got the impression the floor space he wanted to use was in the bit below the green beam?
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: is this timber roof horizontaly stable?
RE: is this timber roof horizontaly stable?
Dik
RE: is this timber roof horizontaly stable?
Edit: Adding braces between the brown and green members as suggested above, does nothing to change this.
BA
RE: is this timber roof horizontaly stable?
DaveAtkins
RE: is this timber roof horizontaly stable?
BA