Ceramic Tile Advice Forums - John Bridge Ceramic Tile

Welcome to John Bridge / Tile Your World, the friendliest DIY Forum on the Internet


Advertiser Directory
JohnBridge.com Home
Buy John Bridge's Books

Go Back   Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board

Sponsors


Reply
Thread Tools Search this Thread
Unread 08-22-2022, 07:09 PM   #16
JoeC8023
Registered User
 
Join Date: Oct 2021
Posts: 11
Conventional lumber vs LVL deflection

I’m Planing on sistering all my 2x8s 16oc full length on my 2nd fl (8x15) bath. The unsupported Span under the bath is 11.5. How much of a difference in deflection would there be if i used LVLs instead of conventional 2x8s?
__________________
Joe
JoeC8023 is offline   Reply With Quote
Unread 08-22-2022, 07:25 PM   #17
cx
Moderator emeritus
 
cx's Avatar
 
Join Date: Jul 2001
Location: Boerne, Texas
Posts: 96,047
This for your wet room project, Joe?

The LVL would make a significant difference as opposed to dimensional lumber, but from your description you could get by with just a good grade of dimension wood for your application.

My opinion; worth price charged.
__________________
CX

Y'ALL NEW VISITORS READ THIS HERE!

Last edited by cx; 10-26-2022 at 04:39 PM. Reason: typo
cx is offline   Reply With Quote
Unread 08-22-2022, 08:06 PM   #18
JoeC8023
Registered User
 
Join Date: Oct 2021
Posts: 11
Yes this for my wet room. I planned on putting a flush mount I beam in on the first fl where the bathroom 2x8s sit. I want to open up my kitchen in a few years and when i was about to start laying the deck mud I started thinking about the weight and trying to do that later and cracking a tile if anything shifts. So now i have my first floor opened up and plan is to install a super 7 I-beam( same strength as a w8x31 ) and sister all 12 joist. I don’t mind running lvls if it would make a big difference, I’m getting a deflection of l/550 with conventional. using 32x32 7/16 porcelain over 1 1/4 mud bed.
__________________
Joe
JoeC8023 is offline   Reply With Quote
Unread 08-22-2022, 08:49 PM   #19
cx
Moderator emeritus
 
cx's Avatar
 
Join Date: Jul 2001
Location: Boerne, Texas
Posts: 96,047
Let's please keep all the project questions on one thread so folks can see what you're working on and what's been previously asked and answered
Quote:
Originally Posted by Joe
...plan is to install a super 7 I-beam( same strength as a w8x31 )...
Sorry, none of that computes at all for me, Joe. And you say you have your "first floor opened up," but I thought we were working on the second floor of this building. I'm gettin' a bit confused.

As for the LVLs, they're heavy, some of'em hard as Chinese algebra when comes to nailing, but they're straight and they're strong. Also a good bit more costly than dimension lumber. Entirely up to you whether to use them.

My opinion; worth price charged.
__________________
CX

Y'ALL NEW VISITORS READ THIS HERE!
cx is offline   Reply With Quote
Unread 08-23-2022, 06:43 AM   #20
ss3964spd
Moderator
 
ss3964spd's Avatar
 
Join Date: Jul 2005
Location: Fairfax, Va
Posts: 5,340
Send a message via Yahoo to ss3964spd
Conventional or engineered, I'd want them sized a bit less than the nominal 2X8's that are currently installed. A nominal 2X8 is actually 7 1/4" tall, but that can vary along the length of the board. If it's less anywhere and you try to install the new ones so that their bottoms are even with the bottoms of the existing, you'll likely displace the subfloor above, especially if the current ones have sagged. Also, it'll be a challenge when you try to get the ends of the new ones into the space between the sill plate and subfloor on one end. You won't be able to roll them in, since the diagonal measurement across the end grain is greater.

Lessons learned from when I sistered a bunch of 2X10's. I'd have saved an awful lot of work had I ripped 1/4" off each one.
__________________
Dan
---------------------------------------------------------------------------------
If I recall correctly my memory is excellent, but my ability to access it is intermittent.
ss3964spd is offline   Reply With Quote
Unread 09-23-2022, 06:40 PM   #21
JoeC8023
Registered User
 
Join Date: Oct 2021
Posts: 11
Update on my progress got all the 2x8s sistered up with 1 3/4 LVLs all tied into new steel i-beam. I should definitely be good now with the deflection. I’m Going tackle the mud job tomorrow and water proofing this week. I was debating on going with Sheetrock and membrane on the shower walls or Kerri board any suggestions on that i haven’t done either before ?
Attached Images
 
__________________
Joe

Last edited by JoeC8023; 09-23-2022 at 06:46 PM.
JoeC8023 is offline   Reply With Quote
Unread 09-25-2022, 06:58 AM   #22
ss3964spd
Moderator
 
ss3964spd's Avatar
 
Join Date: Jul 2005
Location: Fairfax, Va
Posts: 5,340
Send a message via Yahoo to ss3964spd
My own preference, Joe, would be Kerdi board, for its ease of handling and installation.
__________________
Dan
---------------------------------------------------------------------------------
If I recall correctly my memory is excellent, but my ability to access it is intermittent.
ss3964spd is offline   Reply With Quote
Unread 10-26-2022, 04:45 PM   #23
JoeC8023
Registered User
 
Join Date: Oct 2021
Posts: 11
Finally got some progress been going smooth so far using the kerdi board worked out great.
Attached Images
   
__________________
Joe

Last edited by JoeC8023; 10-26-2022 at 04:51 PM.
JoeC8023 is offline   Reply With Quote
Reply

Stonetooling.com   Tile-Assn.com   National Gypsum Permabase


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
living room and dining room Versailles pattern travertine install chrisr Tile Forum/Advice Board 52 09-03-2015 03:07 PM
Curb against entrance door and leaving room for trim jake65892 Tile Forum/Advice Board 24 07-18-2013 06:21 PM
Matching grout lines room to room dakota1668 Tile Forum/Advice Board 11 01-04-2013 11:55 AM
Tiling a varying-height shower curb; Penny tile OK on top of curb? smcquaid Tile Forum/Advice Board 6 01-07-2012 09:02 PM
Tile layout from room to room equinecpa Tile Forum/Advice Board 4 12-18-2001 08:57 PM


All times are GMT -6. The time now is 04:24 AM.


Sponsors

Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.
Copyright 2018 John Bridge & Associates, LLC