TJI Spacing - Roofing/Siding - DIY Home Improvement | DIYChatroom

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding


Thread Tools Display Modes
Old 07-07-2007, 09:35 PM   #1
Join Date: Jul 2007
Posts: 1
Rewards Points: 10

TJI spacing

What size TJI joists do I need to span 30 ft and at what spacing to have a 30 lb snow load. Iwas guessing a 4 foot spacing but don't know for sure and sure don't know the size TJI joist, THX!
PS...Single pitch roof that drops 1:12 pitch.


Last edited by jimjam; 07-07-2007 at 10:27 PM. Reason: forgot roof pitch
jimjam is offline   Reply With Quote
Old 07-09-2007, 06:06 AM   #2
RippySkippy's Avatar
Join Date: Feb 2007
Location: Ames, Iowa
Posts: 1,233
Rewards Points: 500

Contact your supplier, they'll have all the information you need to size and space the joist correctly.


RippySkippy is offline   Reply With Quote
Old 07-09-2007, 06:22 AM   #3
Lic. Builder/GC/Remodeler
AtlanticWBConst.'s Avatar
Join Date: May 2006
Location: New England
Posts: 7,556
Rewards Points: 2,000


They will tell you what information you need to provide them with in order for them to run the calculations for the joist dimensions.

Usually, if you confirm that you are going to be purchasing the joists from them, they will do this at no additional charge.
- Build Well -
AtlanticWBConst. is offline   Reply With Quote
Old 07-09-2007, 08:13 PM   #4
Extreme DIY'r Adk's, NY
Join Date: Nov 2005
Posts: 324
Rewards Points: 272

good recommendations guys, varies by manufacturer for one thing.

but lets steer him in the right direction... look at the numbers... 1:12 pitch 30 psf loading... that probably means 30psf live snow load plus 10-15 dead load for roof If so I'd guesstimate 24" oc MAX with like 14" or 16" deep joists! If I were winging a quote I'd base it on 16" oc 16" joists, can probably go 19.2oc though.

I designed my whole house with these, GP brand. They said it couldnt be done. Their layout had me framing each room in a different direction with varying heights... what a pita. I was trying to run hydroponic heating and didnt want to deal with that mess. I talked to that guys boss and had them send me the loads their software calculated that were transferred down from the roofs and their span charts. I laid it out all in one direction, added some lvls of the same height here and there and two columns and sent it back to them and they pretty much stamped
crecore is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
shingle seam spacing fredhedd Roofing/Siding 7 04-08-2009 06:52 AM
rafter spacing Clutchcargo Building & Construction 5 08-11-2007 02:14 PM
Sonotube spacing billinak Building & Construction 2 05-03-2007 04:31 PM
spindle spacing jibber Carpentry 5 02-18-2007 08:30 PM
Undercabinet lighting spacing wbjdmd Electrical 3 11-12-2006 08:55 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1