16 foot span with load bearing wall above

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Old 02-13-11, 04:21 PM
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16 foot span with load bearing wall above

I am replacing a 16x34 foot flat roof with an upstairs and pitched roof. Each side of the new roof will be about 16 feet. I need to place a load bearing wall about 8 feet in from each end due to a change in pitch. I am considering either manufactured I-beam or open web truss under the walls. Would prefer the open web. Does anyone know what size of beam will be needed under the load bearing walls?
 
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Old 02-13-11, 05:28 PM
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Welcome to the forums! I would enlist the help of an engineer, mainly because I am not sure the structure is rated for a second floor. Not knowing could be catastrophic if it should fail. He/she could advise better the size of the truss/beam necessary for your application. Sorry I couldn't give better info, but better to be safe in a situation like this.
 
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Old 02-13-11, 05:31 PM
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Can you answer this? What are the options for a garage door header with an 18 foot span?
 
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Old 02-14-11, 04:33 AM
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Triple 9 1/2" LVL, but you will need extra support jacks on the ends if all you have is a 2x4 wall, since LVL is 1 3/4" thick.
 
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