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Old 05-06-2012, 11:53 AM   #16
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Joe, yes this is a wide open space. The gym sits on concert footers that runs the length of the gym (80ft) and then it has 2x12 joist sits across them (36ft-width of gym), it has a subfloor that is TG, then has the wood floor TG on top of it.

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Old 05-06-2012, 12:01 PM   #17
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


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Originally Posted by wesshe69
Joe, yes this is a wide open space. The gym sits on concert footers that runs the length of the gym (80ft) and then it has 2x12 joist sits across them (36ft-width of gym), it has a subfloor that is TG, then has the wood floor TG on top of it.
Where will your walls land on these 2x12's?
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Old 05-06-2012, 12:05 PM   #18
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Thank you Daniel...Your suggestion are very helpful. We will be looking into getting the International Residential Codes.
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Old 05-06-2012, 12:07 PM   #19
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


They will be sitting on top of the 2x12...running the same direction.
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Old 05-06-2012, 12:09 PM   #20
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


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They will be sitting on top of the 2x12...running the same direction.
You need beams underneath those load bearing walls. They cannot just sit on top of a single 2x12. How do you know that the walls will not be in between the 2x12?
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Old 05-06-2012, 12:09 PM   #21
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Joe, we were also thinking to add additional concrete support underneath.
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Old 05-06-2012, 12:16 PM   #22
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Just measure and if it ends up in between the 2x12 then build additional floor joist and support underneath.
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Old 05-06-2012, 12:30 PM   #23
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Thank you DM...Just because our town doesnt required building permits, and inspections doesnt mean that we are going to do that. We are consulting Building contractors and listening to what they say and I have to add that there are alot of contradictions maybe because we live in an unincorporated town. We feel this way...if something goes wrong and a contractor is involved in the building process, if we have not done our homework ultimately we will be responsible. We must make good sound choices and how do we do that...is doing our homework...RESEARCH. This will ensure our home will be safe, and sound...right? Thank you again DM, your advise was helpful.
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Old 05-06-2012, 12:34 PM   #24
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


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Originally Posted by wesshe69
Just measure and if it ends up in between the 2x12 then build additional floor joist and support underneath.
Any walls perpendicular to the joists...if so where?
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Old 05-06-2012, 12:43 PM   #25
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


Joe, Only the interior walls will be perpendicular to the joists.
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Old 05-06-2012, 12:50 PM   #26
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


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Joe, Only the interior walls will be perpendicular to the joists.
And aren't those the load bearing walls set at.14' supporting the second floor? These are the walls I've been talking about. If so....where do they land on the 2x12's?
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Old 05-06-2012, 01:14 PM   #27
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New construction of second floor, would 2x8' be okay to use instread of 2x12'?


We will be building two low bearing walls and adding to an existing low bearing wall. The first one will be in the middle of the gym, the 2nd LBW will be 14' from it, and 14' from it we will be adding to an existing LWB. (This is where the stairs will be placed). The first wall (in the middle) will be on top of a 2x12 floor joist running the same direction and there after 2' centers. The second floor joist will be running from one LBW to the other LBW. We believe that we are going to triple the 2x12s to get the support that we need on the LBW.

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