|
Posted by Bobk207 on January 3, 2007, 6:15 pm
Dan Deckert wrote:
> All new construction!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> A 4 wall loft built into a 30x50 shop. (all wood framed utilizing 3 exterior
> walls)
> The loft floor is 16x30, with 7'6" ceiling @ the eaves, utilizing the end
> wall. 30' wide and protruding 16' into the 50' length of the bldg. Loft will
> have a bathroom (6'x16') with a load bearing wall (2x6) underneath at one
> end of the 30' span which would leave an open span of 24'.
>
> _____________________________________________ 30' wide
> |
> | |
> |
> | | <bathroom 6'x16'
> | <exterior wall |
> | <exterior wall
> |
> | |
> |
> | |
> --------- <-16' long |<2x6
> load bearing wall
> ^ This interior wall will also be a 2x6 wall ^ around 9~12' @ the
> peak.
>
> As the owner would like a clearspan for the 24', I need some input as what
> he could/can use for sub framing for the span. The clearance is currently
> 7'-6" from TOS to the bottom of the 2x6' floor joists of the loft. He'd
> 'like' to avoid the use of structural steel members for the span. And since
> I know darn near diddley about wood framing for loads, I need some
> input/suggestions to make this span.
>
> On a guessing side, I was looking at those weird I-beams made of wood and am
> guessing they'd be about 14~16" deep for this. The owner is 6'1" and has
> concerns for "head knocking"! So we're looking @ a minimum depth for the
> span. 7'-6" minus whatever to stay above his 6'-1" head. Cap/hat/boots not
> included!
>
> FYI; His cost for rough cut lumber (full 2x6) is $720/2k board feet. Hence,
> lumber costs are not a real issue here.
>
> Any suggestions/advice are welcome. I can provide JPEG image, ACAD or
> Sketchup drawings if it would help.
>
> I'm also damn jealous on his lumber costs........................
>
> Dan
Dan-
Took me a while to find what you needed but looks like you really
didn't need much help (just a little reassurance)
http://www.ilevel.com/literature/TJ-4000.pdf
This pdf gives you the basics
For a 24' clear span (a residential loft type structure) I would a have
guessed a 14" TJI
If you want the floor the feel stiffer (less bounce) bump up to 16"
deep or a wider flanged 14"
..........if you get the TJI's from a knowledgeable supplier they will
be able to evaluate your situation.
Where is this being built? You might consider checking with the local
building dept or get an engineer to take a look at your design
cheers
Bob
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap