Am I reading Code Incorrectly?
Am I reading Code Incorrectly?
(OP)
Good Evening All,
Quick question about Residential Code, Section %502.5(2) - Girder Spans and Header Spans For Interior Bearing Walls... Since I have a good depression on the side of my house I was thinking about making a garage under a prefab cape code type addition...
I am looking at some modular houses plans (continuing my escapade with home addition/garage). I keep seeing girder spans utilizing (4) 2x10's with spans over what, I interpret, is the maximum span of 6'-2" (supporting two floors, 28ft width).
I hope some of you are familiar with the trusses that come with modular construction? They are bolted together at the midspan. Maybe I am incorrect in assuming that these set-ups are supporting two floors since there is a pre-engineered roof truss supporting the second floor (Cape Code type modular addition) as clear span?
Quick question about Residential Code, Section %502.5(2) - Girder Spans and Header Spans For Interior Bearing Walls... Since I have a good depression on the side of my house I was thinking about making a garage under a prefab cape code type addition...
I am looking at some modular houses plans (continuing my escapade with home addition/garage). I keep seeing girder spans utilizing (4) 2x10's with spans over what, I interpret, is the maximum span of 6'-2" (supporting two floors, 28ft width).
I hope some of you are familiar with the trusses that come with modular construction? They are bolted together at the midspan. Maybe I am incorrect in assuming that these set-ups are supporting two floors since there is a pre-engineered roof truss supporting the second floor (Cape Code type modular addition) as clear span?






RE: Am I reading Code Incorrectly?
the 28ft width probably isn't the actual joist bearing since that is a long span and would not be doable with non-engineered floor joists.
RE: Am I reading Code Incorrectly?
As a reference, Texas requires any members spanning greater than 24 feet to be engineered, and I am sure your state is similar. Spans of 28 feet can be done with plate-connected wood trusses about 24 inch deep. This gives you the added advantage of giving you space within the structure to run drain lines, ducts and electrical.
If I were building this, I might consider a concrete flat plate/slab over the garage for fire resistance (and because I am partial to concrete structures, being in tornado alley.) Another option would be steel trusses, either hot rolled or cold-formed steel. These have an added advantage of being pre-assembled and light enough to be handled by a couple of guys.
RE: Am I reading Code Incorrectly?
RE: Am I reading Code Incorrectly?
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.