Forums | Home Repair | Home Improvement | Painting | Interior Decorating | Remodeling | Landscaping


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 04-09-2008, 01:43 PM   #1
Newbie
 
Join Date: Apr 2008
Posts: 6
Share |
Default

Adding support to subfloor from crawlspace?


I just bought a house that has a small amount of movement in the kitchen by the fridge. It is nominal and only really noticeable if you do jumping-jacks by the fridge. I was wondering if there is a way to add some support to this area to alleviate the issue. I am looing to do it myself and not cost a whole lot. I have thought maybe 4x4 decking posts and concrete slab footing similar to what you use on oustide decking...
eqppwqqep is offline   Reply With Quote
Old 04-09-2008, 08:55 PM   #2
remodeling pro
 
Join Date: Sep 2006
Posts: 1,399
Default

Adding support to subfloor from crawlspace?


Pouring a small conccrete collar around individual posts as you suggest may work short term, but they will be succeptable to sinking over time. A better way is to pour a continious footing, with some rebar in it, upon which to support the "legs". Another option, if pipes and wires do not prevent it, is to either double the existing floor joists by sistering, or install additional joists from sill to sill between the existing ones.
troubleseeker is offline   Reply With Quote
Old 04-14-2008, 07:45 PM   #3
Member
 
Join Date: Mar 2008
Location: Bay Area, CA
Posts: 68
Default

Adding support to subfloor from crawlspace?


I have the exact same problem in my addition! My joists are 4x6 beams that are 48" on center, so I am adding 2x8 joists (I may over-build with 2x10) in-between them, 16" on center, as well as pier footings like you were thinking. Underneath the crawlspace is a concrete pad, which used to be the outside patio, so I wont have to worry about them sinking.
__________________
I ask the stupid questions.....but I expect the smart answers.
Wanttodoitright is offline   Reply With Quote
Old 04-14-2008, 10:59 PM   #4
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Default

Adding support to subfloor from crawlspace?


What you're feeling is probably deflection in the joists. When you do your jumping jacks you're loading one, maybe two joists more than the rest of the joists in the floor system.

You can't eliminate it, but you can sure minimize it by adding 2x10 blocking between the joists, which is what is called load sharing. Every several feet in each joist space, add a block of 2x10 and nail it in. You can offset the blocks an inch or two to facilitate nailing.

The blocks, when tight and nailed, will take the load of your footsteps and "load share" it to other joists.

It is really easy and it does work pretty well, without spending a lot of money unless your floor joists are just drastically over-spanned.
Termite is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Adding Microlam to garage, to support 2 doors and storage??? Shannon Building & Construction 8 10-19-2011 11:58 PM
adding a gas fixture - will the metter support ? amakarevic Plumbing 4 02-29-2008 09:22 AM
musty crawlspace svmaine Building & Construction 2 09-03-2007 03:53 PM
crawlspace exposed to outside and damp djbauda Building & Construction 5 07-30-2007 07:49 AM
Adding outdoor wiring from crawlspace MusicMan_234 Electrical 2 06-25-2007 08:57 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.