Structural Support - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 01-15-2013, 05:53 PM   #1
Join Date: Jan 2013
Posts: 2
Rewards Points: 10

Structural Support

Um, I have absolutely no idea if anyone hear can help me or not. And I know nothing about home repairs - although I'm eager to learn. Here is my situation: my partner and I recently had our upstairs (main) bath renovated by a contractor. The bathroom has porcelain tiles (12 X 24) in the bathtub area, on the outside of the tub, and floor. There is also a toilet, small vanity, and regular size tub.

I have some concerns about whether or not the structure underneath the bathroom is strong enough to bear the weight of the new tile and fixtures, including a glass shower door which is arriving later this week and which weights about 100-150lbs according to the contractor. We live in an older home (built in 1907), and I know at some point most of the walls on the main floor were removed to make it open concept. The bathroom is over our dining room, which is a 13X15-1/2 room. We'd always noticed a little sagging in the dining room ceiling, but nothing substantial, and when you walk on the floor upstairs it feels solid. The joists under the second floor are 2X8 (we know this because at one point we had a hole in the dining room ceiling and were told the joists were 2X8). We've had the contractor in and he doesn't seem to be concerned. I think we should get a structural engineer to come in and make sure nothing is going to fall through the ceiling.

If anyone could provide any thoughts or direction on what we should do here, and whether I'm just being paranoid, I'd really appreciate it.


cordelialear is offline   Reply With Quote
Old 01-15-2013, 06:24 PM   #2
Join Date: Nov 2011
Location: Hartfield VA
Posts: 34,587
Rewards Points: 14,306

Call in a real engineer before he does anything.


joecaption is offline   Reply With Quote
Old 01-15-2013, 06:36 PM   #3
DIY staff

Join Date: Sep 2009
Location: Kane county,Illinois
Posts: 25,728
Rewards Points: 7,174

If you can get use a few numbers--we have several engineers here--

Floor joist size----spacing--type of wood if possible--and unsupported length--(from bearing wall to beam or other bearing wall) one of us will help---

This would have been easier before the bath was completed---but 'sistering' in additional joists along side the existing ones could be done from below---
New members: Adding your location to your profile helps in many ways.--M--
oh'mike is offline   Reply With Quote
Old 01-15-2013, 06:45 PM   #4
Residential Designer
AndyGump's Avatar
Join Date: Sep 2010
Location: Orange County CA.
Posts: 1,386
Rewards Points: 688
Send a message via Skype™ to AndyGump

Well Cordelia, it is possible that the joist will be sufficient for the bath area. Yours is an older home and if the 2x8s are spanning the shorter distance and on 16" centers or less you should be safe from any catastrophic failures.
That is not to say that the floor may not experience some additional deflection (sag) over time though.

I don't think I would be overly worried about it but of course I am not there to look at it.

Residential Drafter/Designer
AndyGump is offline   Reply With Quote
Old 01-15-2013, 11:12 PM   #5
Registered User
Join Date: Mar 2009
Posts: 11,730
Rewards Points: 526

Many of older houses had air-dried rather than kiln-dried joists. They were milled a true 2x8 inches, and USUALLY #2 grade wood. A local SE could establish the span/grade/species for you but here are the basics; Check the spans, may help you decide action taken...

PS. welcome to the forums! Also;
If any ads are present below my answer or words underlined/colored, I do not condone/support/use the product or services listed/linked to, they are there without my consent.
17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?
Gary in WA is offline   Reply With Quote
Old 01-16-2013, 03:51 PM   #6
Join Date: Jan 2013
Posts: 2
Rewards Points: 10


Thanks to you all. Am having a structural engineer come in on Friday to take a look at everything and make sure there are no issues. I fear it will mean opening up our dining room ceiling, but necesssary, I think, for peace of mind.

Thanks again.


cordelialear is offline   Reply With Quote
The Following User Says Thank You to cordelialear For This Useful Post:
oh'mike (01-16-2013)

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
Something doesn't seem right here. Structural wall removed with no support. Siubeer Building & Construction 28 11-25-2012 06:55 PM
1 story, cbs, do the sistered joists need support? nosh0es4u Remodeling 3 10-03-2012 08:23 AM
Main structural support beam HELP!!! Daniel048225 Building & Construction 34 02-16-2011 11:35 PM
Basement support post failure fetzer85 Building & Construction 15 05-09-2010 10:35 PM
moving a support wall 6 ft over.? help jstamps Building & Construction 1 04-20-2010 05:48 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1