Author Topic: Yet another loft floor joist question.  (Read 1696 times)

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GW

  • Guest
Yet another loft floor joist question.
« on: October 25, 2007, 12:20:55 PM »
As I mentioned before, I'm thinking about building the 20x30 1 story,2x6 walls,but with a loft bedroom with dormers. For the loft floor joists the span will be 20'. I was thinking of using 2x12s on 16" centers, resting them on the double top plate and nailing them to the rafters.Because of the birdsmouth I would need to cut the corners off to account for the roof slope, would this weaken them too much? Another option I have been considering is having a beam running across the span and having smaller floor joists running perpendicular. Any thoughts on this? I'm a novice builder so I'll be asking alot more questions between now and next summer.

peter_nap

  • Guest
Re: Yet another loft floor joist question.
« Reply #1 on: October 25, 2007, 01:12:46 PM »
I'd toenail them just for extra peace of mind. Make sure you put blocking in between and I think you'll be fine,

glenn-k

  • Guest
Re: Yet another loft floor joist question.
« Reply #2 on: October 25, 2007, 02:30:58 PM »
If I understand right , you are talking about clipping the corner off of the floor joist where it would stick out through the roof, above the rafter.

The portion above a 45 degree angle line from the outside edge, above the area of bearing is pretty much waste and performs nearly no function  structurally.  Hope that makes sense.  In other words - yes - clip it off - it won't hurt anything. :)

GW

  • Guest
Re: Yet another loft floor joist question.
« Reply #3 on: October 25, 2007, 02:48:41 PM »
Thats was I was hoping to hear, thanks Glen.

peter_nap

  • Guest
Re: Yet another loft floor joist question.
« Reply #4 on: October 25, 2007, 03:30:44 PM »
Sorry, I thought the clipping was a given. I was talking about nailing it to the rafter.

 

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