9-1/2" or 11-7/8" I Joists?

Reply

  #1  
Old 03-03-17, 10:45 AM
Member
Thread Starter
Join Date: Mar 2014
Location: United States
Posts: 100
9-1/2" or 11-7/8" I Joists?

I will be purchasing 28' I-Joists for a build. If the support LVL is dead center, so 14' span....would 9-1/2" I-Joists be substantial, or will they feel a bit spongy? This is assuming just 3/4" T&G OSB is used for the subfloor prior to carpet. The specs say they clear spans up to 16'6" with 16"o.c. but I have always used 11-7/8" thick I-Joists for my projects so I don't know how the floor would feel with the lesser I-Joists.

Hoping to hear some advice from those who have or have worked with the two options to compare.

Thanks.
 
Sponsored Links
  #2  
Old 03-03-17, 01:23 PM
Group Moderator
Join Date: Mar 2003
Location: NC, USA
Posts: 17,768
I do not like to go close to the limit and will usually go up a size so the floor feels more solid. It also has the benefit of offering more space in the joist bays for running ductwork and plumbing. Depending on what mechanicals you have that need to pass through your I joists you might need the extra height.
 
  #3  
Old 03-03-17, 02:02 PM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 18,657
Might be enough for carpet but insufficient if your taste ever turns to tile.
 
Reply

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


Thread Tools
Search this Thread
Display Modes