Construction of commercial bldg. framing and roof design
Construction of commercial bldg. framing and roof design
(OP)
Are commercial buildings typically designed to have 8" CMU load bearing block walls, wooden trusses, with a metal roof? I'm no structural engineer or construction guy, but this sounds kind of fishy to me. Is CMU block sufficient for lateral and compression loading? Is wooden trusses with a metal roof typical?
Building Specs:
3775 sq. ft
10' ceiling
Loaded kitchen (stove, oven...etc)
Gabled roof
Thanks!
Building Specs:
3775 sq. ft
10' ceiling
Loaded kitchen (stove, oven...etc)
Gabled roof
Thanks!






RE: Construction of commercial bldg. framing and roof design
Very common.
RE: Construction of commercial bldg. framing and roof design
RE: Construction of commercial bldg. framing and roof design
Usually, though, commercial buildings have very flat 1/8" to 1/4" per foot roof slopes, and metal roofs do not serve very well in that condition. PEMB's commonly have minimum roof slopes of 1/12, four times that of commercial flat roof buildings.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Construction of commercial bldg. framing and roof design
roof slope is 6/12.
wood trusses
cmu block wall
sheathing is the same as roof decking? could i use a steel deck with wood trusses and metal roof?
RE: Construction of commercial bldg. framing and roof design
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: Construction of commercial bldg. framing and roof design
"metal roofing"
"wooden trusses"
"8" CMU walls"
Etc.
Very vague, leaving the design up to the contractor.
I'm only checking what the owner is specifying to the contractor.
RE: Construction of commercial bldg. framing and roof design
Many lighweight steel sheet fabricators have very well documented shear values for these products - esp using wood trusses or purlins at 2'-0'' oc. Maybe not your favorite idea nor mine - but they do work... Fifty years of experience has proven that.
BTW - NOT standing seam - that does need plywood!!!
RE: Construction of commercial bldg. framing and roof design
RE: Construction of commercial bldg. framing and roof design
RE: Construction of commercial bldg. framing and roof design
don't worry.
RE: Construction of commercial bldg. framing and roof design
RE: Construction of commercial bldg. framing and roof design
Mike:
I have seen that too, but I would never do it in a commercial structure. Perhaps a farm building.
Remember that the CMU walls mentioned will contribute to the lateral forces on the diaphragm, and the size og the structure, coupled with the CMU walls, could make the metal roofing diaphragm concept very, very tenable at best. Then again, maybe wind controls...
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com