Can a rim joist be larger than the joists?

Reply

  #1  
Old 02-15-19, 07:57 AM
N
Member
Thread Starter
Join Date: Jan 2019
Location: USA, IL
Posts: 6
Received 0 Votes on 0 Posts
Can a rim joist be larger than the joists?

Per subject. Can I have 2x8 rim joists, and 2x6 joists within?

if I built a deck using 2x6 joists, and obviously used (at a minimum) spacing for joists and beams per IRC... I can build a compliant deck

However, when I read DCA6, it says for deck railing posts they need to attach to minimum 2x8 rim joists

So question... can I use 2x8 rim joists to enable railing, but the joists themselves within the deck structure are only 2x6?

I have multiple constraints (in another thread) that are leading me to either flush beam construction where I can use 2x10 , or if I go dropped beam it'll likely be 2x6 for beams and joists
 
  #2  
Old 02-15-19, 08:01 AM
N
Member
Thread Starter
Join Date: Jan 2019
Location: USA, IL
Posts: 6
Received 0 Votes on 0 Posts
I should add, I know preference for majority is 2x6 isn't good for a freestanding deck, and 2x8 minimum... but please put that aside for now. This is whether this would meet the code.
I will have added piers, cross bracing, and all the good stuff to make sure this thing doesnt wobble (and it's <18" off the ground)
 
  #3  
Old 02-15-19, 09:15 AM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 26,549
Received 785 Votes on 723 Posts
Yes, that's fine. See table 2 and footnote 6.
 
  #4  
Old 02-15-19, 01:24 PM
N
Member
Thread Starter
Join Date: Jan 2019
Location: USA, IL
Posts: 6
Received 0 Votes on 0 Posts
thank you, yes, that is note that got me thinking. It is permitted to have the rim joist (2x8) and the joists (2x6) attached to it be different heights? (or at least, it isn't excluded)
 
  #5  
Old 02-15-19, 04:21 PM
XSleeper's Avatar
Group Moderator
Join Date: Dec 2004
Location: USA
Posts: 26,549
Received 785 Votes on 723 Posts
Yes, just like a ledger must be a minimum of 2x8.
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description: