Roof sheating and RC columns in loft room
Roof sheating and RC columns in loft room
(OP)
Hi, Im dealing with a loft room - there are only outer bearing walls (masonry).

Plan dimensions are not that small - What bothers me is that there are NONE inner bearing walls in the loft, onyl outer walls.
With proper sheathing of the roof (above rafters) is it OK as far as stability of the walls go?
RC colums (3 m height) are supporting wood beams for a roof. Im wondering if I should designed them as cantilever or no? Im wondering if there may be only vertical force to consider since sheathing will most likely act like diaphragm and transfer any horizontal froces (wind) to the outer bearing walls.
Id like to hear some opinions on these 2 topics.
Tnx.



Plan dimensions are not that small - What bothers me is that there are NONE inner bearing walls in the loft, onyl outer walls.
With proper sheathing of the roof (above rafters) is it OK as far as stability of the walls go?
RC colums (3 m height) are supporting wood beams for a roof. Im wondering if I should designed them as cantilever or no? Im wondering if there may be only vertical force to consider since sheathing will most likely act like diaphragm and transfer any horizontal froces (wind) to the outer bearing walls.
Id like to hear some opinions on these 2 topics.
Tnx.








RE: Roof sheating and RC columns in loft room
Dik
RE: Roof sheating and RC columns in loft room
Double check that in addition to having lateral transfer of diaphragm to walls, you also have proper out-of-plane-anchorage/sub-diaphragm load transfer per ASCE 7-10, Sec 12.11, as applicable for your particular Seismic Design Category.
RE: Roof sheating and RC columns in loft room
Dik
RE: Roof sheating and RC columns in loft room
RE: Roof sheating and RC columns in loft room
Dik