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    Bob McWherter's Avatar
    Bob McWherter Posts: 1, Reputation: 1
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    #1

    Jan 24, 2010, 09:35 PM
    I want to span a 19
    I have a 18'7" x 20' two story room. Going to add a room over this room. We will need to span 18'7" width with 2x12s on 12" center. Will this support the new floor on second level, with furniture and a television, as described. It is better to go an engineered flooring system, double up the 2x12x, or double up to form a girder with 2x12, then plywood in betweed, then 2x12 again?

    If girders, could they go to 16" centers. Want to do it once and do it right.
    KBC's Avatar
    KBC Posts: 2,550, Reputation: 487
    Ultra Member
    		  
    #2

    Jan 25, 2010, 07:24 AM

    I would look into LVL's for the supports,they carry great loads and have little deflection.

    Versatile Beam for Residential Construction - iLevel Trus Joist Microllam LVL Beam

    Education - LVL

    We used these for a clear span of 22 feet and have had no problem with them.
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