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 06-29-2009, 08:50 PM   #1
Newbie
 
Join Date: Jun 2009
Posts: 4
Share |
Default

Framing a subfloor!


Hello,
I'm thinking about enclosing the upper level of my garage to take advantage of about 1000 sq/ft of space that was wasted as an inherant result of the topography of my lot.

As illustrated in the attached pix, I have an elevated foundation. I want to frame a subfloor in my garage and enclose the upper level.

The Dimensions of the garage are 20.5' W x 30' L. I plan to cut down and hang 2"X12'X22' joists the width of the garage at 16" centers directly at the level of the foundation. This make the floor level the same as the adjacent office and will allow me to make access to the new room from the office by cutting a doorway in the sheetrock directly above the foundation (shown in pix).

I have a couple of questions about how to get started! I think the first step would be to attached the ledger to the concrete foundataion using concrete lags and all thread or bolts with large washers to secure the ledger to the concrete. I will then probably shore it up with some 2X4's from the garage floor to the 2X12 ledger. Is that a correct assumption?

On the other side (left as looking in to the garage from the door), where there is currently sheetrock and I suspect 2X4 studs, I plan to cut out the 12" horizontal strip of sheet rock to expose the studs. My question on this side is, would I put a ledger board flush against the studs and secure the joists with joist hangers as I will do on the opposite side, or would I put 2x4 bracing between the studs and rest the joists on that bracing?

I plan to cut 2X12"x22' down to fit the width of the garage and one of two options to support the center: My first option is to strap the bottom of the joists together using a 2X4 the length of the garage and to use 3 or 4 - 4" diameter steel columns bolted to the garage floor to support the subfloor. The second options to to frame a wall the length of the subfloor and devide my two car garage in half. I prefer the columns as not to take up the space from a wall but will use what is best! Suggestions?

A pool table with 1.5" slate top will eventually reside in this room so whatever I do, will have to be secure!

Am I on the right track here in my construction assumptions? Any planning tools, tips or tricks recommended by the professsionals?

Thanks for your advice and help.

I can take more shots at different angles to support and decisions or questions you made need asnwered before advinsing!

I'm hoping to do this on my own with the help of a few buddies. I am handy with tools, I can read county codes and I have done some frameing in the past, albeit very light work compared to this project. I know this job is quite a few levels more difficult than a typical weekend project but I'm sure I can handle it. I accidentally asked this question in contractortalk.com and was blasted with insults and told I could not do this job on my own and to hire a professional. If that is your position, dually noted and respected but I still need to know the correct way to do this so that I can trust that the contractor has done it correctly.
Attached Thumbnails
Framing a subfloor!-1.jpg   Framing a subfloor!-3.jpg   Framing a subfloor!-5.jpg   Framing a subfloor!-2.jpg   Framing a subfloor!-4.jpg  



Last edited by CooterBrown; 06-29-2009 at 09:10 PM.
CooterBrown is offline   Reply With Quote
Old 06-29-2009, 09:08 PM   #2
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Framing a subfloor!


I'd look into I-joists VS the 2x 12's
A lumber store can tell you which will be stronger & by how much

Scuba_Dave is offline   Reply With Quote
Old 06-29-2009, 09:15 PM   #3
Newbie
 
Join Date: Jun 2009
Posts: 4
Default

Framing a subfloor!


I have my doubts that under the sheet rock on the wall to the left while looking in to the garage from the door, that solid length 2x4 studs run the span from the garage floor to the 22+ foot ceiling! Any guesses what might be under that sheet rock? perhaps there is a header that already that could be used as a nailer?
CooterBrown is offline   Reply With Quote
Old 06-29-2009, 09:17 PM   #4
Newbie
 
Join Date: Jun 2009
Posts: 4
Default

Framing a subfloor!


Quote:
Originally Posted by Scuba_Dave View Post
I'd look into I-joists VS the 2x 12's
A lumber store can tell you which will be stronger & by how much
Thanks for the reply! I've looked at some I joists but they are all compressed wood and not solid like the 2X12"s.

Do you suggest that from experience or just suggesting I look into it?
CooterBrown is offline   Reply With Quote
Old 06-29-2009, 09:20 PM   #5
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Default

Framing a subfloor!


From experience & having a lumber company run the numbers on only a 17' span. I-joists were stronger by far
Scuba_Dave is offline   Reply With Quote
Old 06-30-2009, 07:54 AM   #6
Newbie
 
Join Date: Jun 2009
Posts: 4
Default

Framing a subfloor!


Thanks Scoob! I will definately ask the project counter at my lumber yard about that option.

Now, hopefully I can get the structural questions answered.
CooterBrown is offline   Reply With Quote
Old 06-30-2009, 08:27 AM   #7
I have gas!
 
Clutchcargo's Avatar
 
Join Date: Mar 2007
Location: Massachusetts
Posts: 1,767
Default

Framing a subfloor!


Sorry misread. Deleted.
__________________
I tear things down and build them up.

Last edited by Clutchcargo; 06-30-2009 at 08:36 AM.
Clutchcargo is offline   Reply With Quote
Old 06-30-2009, 04:24 PM   #8
Registered User
 
Join Date: Mar 2009
Posts: 9,968
Default

Framing a subfloor!


Sounds to me you are doing this yourself without a permit and looking for the structural solutions, not to check your contractor.
My advice is get a permit---- which would have the structural solutions required by a Licensed Structural Engineer that you hire.
Be safe, G

Gary in WA 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
Need guidance on subfloor problems in new home. wb1026 Flooring 9 10-06-2009 06:29 AM
Subfloor Help, Please! OmahaGirl Flooring 1 01-26-2009 08:06 AM
Subfloor / underlayment question... scheenstra Flooring 7 02-21-2008 07:39 AM
Framing on concrete subfloor blschmitz Building & Construction 4 11-29-2007 06:53 AM
Framing a 16 foot high wall for shop pranderson Building & Construction 10 01-01-2006 04:23 PM




Top of Page | View New Posts

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