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 01-24-2010, 10:43 AM   #16
Member
 
Join Date: Sep 2008
Location: SoCal
Posts: 1,794
Rewards Points: 0
Share |
Default

Concrete slab question


I get a wealth of info and help from my local building department. Plan reviews, preinspection consultations, etc. I like to do a preinspection where each step is discussed and what the inspector will be looking for, then at each inspection I review what is next.

vsheetz is offline   Reply With Quote
Old 01-24-2010, 12:40 PM   #17
Remodeling Contractor
 
Join Date: Dec 2008
Location: Sandy Hook, CT
Posts: 3,590
Rewards Points: 0
Default

Concrete slab question


footings are 8-10 in your area. You will need help to do your own slab. Work must be done very quickly and finishing processes are critical to be done when the concrete is ready. You will need at least 4 people. This is not really a DIY project.
Bob Mariani is offline   Reply With Quote
Old 01-24-2010, 11:09 PM   #18
Concrete & Masonry
 
Join Date: Nov 2008
Location: Wisconsin
Posts: 2,720
Rewards Points: 0
Default

Concrete slab question


Indeed go to your local buildign dept. to see if they have specs. A cross section from them could answer a ton of your questions.

And "Fibermesh" does not replace structural rebar, regardless of what anything you read says.

I would surely go the route of a grade beam/turned down slab/thickened edge slab for a detatched shed regardless of the frost line. The existing grade & outside dimensions could possibly change that opinion though.
jomama45 is offline   Reply With Quote
Old 01-25-2010, 04:58 AM   #19
Member
 
Join Date: Jun 2009
Location: atl & hilton head
Posts: 3,199
Rewards Points: 20
Default

Concrete slab question


slab-on-grade w/crush'd stone base's fine here in atlanta for your bldg's purpose,,, no fiber, wire mesh, or rebar, either,,, if the shed's larger'n 8' x 10', i'll change recommendations, tho
stadry is offline   Reply With Quote
Old 01-25-2010, 06:20 AM   #20
Lost..
 
Join Date: Oct 2009
Location: AL
Posts: 280
Rewards Points: 0
Default

Concrete slab question


Quote:
Originally Posted by itsreallyconc View Post
slab-on-grade w/crush'd stone base's fine here in atlanta for your bldg's purpose,,, no fiber, wire mesh, or rebar, either,,, if the shed's larger'n 8' x 10', i'll change recommendations, tho
Building is 12x16, 6/12 shingle roof. Light wood frame construction. nothing heavy on the slab itself.

I'm going to go talk to the building dept today. I'm going to run some of these questions by them, surely they can point me in the right direction.
J S Machine is offline   Reply With Quote
Old 01-27-2010, 03:23 PM   #21
Lost..
 
Join Date: Oct 2009
Location: AL
Posts: 280
Rewards Points: 0
Default

Concrete slab question


Ok, I have talked with the building dept some more. I went by there the other day on the way home home from work, but nobody was still there that I needed to talk with. I just called a little bit ago and talked to someone who helped me a little bit.

They said it would need 12x12 footings. I asked if it would need rebar if I use fibermesh concrete, and they said it would need rebar in the footings but none in the actual slab. I am off of work friday, so I am going to try and make an appointment to go in and sit down to talk to them.

I didn't realize that this was going to be such an involved project, so I'm going to take it one step at a time. I'm going to concentrate on the slab first, and then worry about the frame after the slab is done and i'm certain everything is ok.

So for now, I just have a couple of questions. When they say 12" x 12" footings, does that mean 12x12 with 4" of the slab on top to be 16" in height, or 12x12 with the slab included? Here is an illustration.



I checked out Willie T's illiustration on batter boards in the other thread, but I was wondering if anyone has a complete set of instructions or a link to some that show the process start to finish. I want to know where to get started, and do this right fom the get-go.
J S Machine is offline   Reply With Quote
Old 01-27-2010, 03:46 PM   #22
Old School
 
Willie T's Avatar
 
Join Date: Jan 2009
Location: St. Petersburg, FL Minds of moderate caliber ordinarily condemn everything which is beyond them.
Posts: 3,634
Rewards Points: 0
Default

Concrete slab question


Is that the way the Building Department showed you to make your 'haunch' footers? It is not the correct way. That inside dirt wall needs to be sloped back at 45 degrees to 'ease' into the slab. The sharp turn shown will soon create a crack line.

Batter Boards: http://www.mydiscounttools.com/estor...anuals/ch4.pdf

This is a little complicated, and I personally think the separate board setups, three feet back, are better. But this will get you there.
__________________
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Willie T

Last edited by Willie T; 01-27-2010 at 03:56 PM.
Willie T is offline   Reply With Quote
Old 01-27-2010, 03:55 PM   #23
Lost..
 
Join Date: Oct 2009
Location: AL
Posts: 280
Rewards Points: 0
Default

Concrete slab question


Quote:
Originally Posted by Willie T View Post
Is that the way the Building Department showed you to make your 'haunch' footers? It is not the correct way.
Give me a break man. I'm a toolmaker, not a General contractor. If you need a die built or a precision vise, I can do that. I'm kinda in the dark here though when it comes to this code stuff.

I don't know the correct way. I'm sure they do, but I haven't had the pleasure of actually getting to talk to them that much. I work 12 hours a day, so getting down there before I get off is kind of not an option. When I went the ther day the one guy I needed to talk to was gone already. I left work early to get there before they shut down but I missed him. Getting information over the phone isn't gonna happen, I've already tried that. Needless to say, it's getting frustrating. I'll have friday off of work, so I will make an appointment to talk with the guy. He knows his stuff, he's just hard to catch.

I'm simply posting here trying to get some pointers on where to get started. If it isn't obvious, my illustrations show my ignorance. I am willing to learn though in order to do it correctly.

Thanks for the link. It looks pretty informative. I'll have to go and pick up some 2x4's to cut up and use as stakes and some string.

Last edited by J S Machine; 01-27-2010 at 04:03 PM.
J S Machine is offline   Reply With Quote
Old 01-27-2010, 04:04 PM   #24
Old School
 
Willie T's Avatar
 
Join Date: Jan 2009
Location: St. Petersburg, FL Minds of moderate caliber ordinarily condemn everything which is beyond them.
Posts: 3,634
Rewards Points: 0
Default

Concrete slab question


Quote:
Originally Posted by J S Machine View Post
Give me a break man. I'm a toolmaker, not a General contractor. If you need a die built or a precision vise, I can do that. I'm kinda in the dark here though when it comes to this code stuff.

I don't know the correct way. I'm sure they do, but I haven't had the pleasure of actually getting to talk to them that much. I work 12 hours a day, so getting down there before I get off is kind of not an option. When I went the ther day the one guy I needed to talk to was gone already. I left work early to get there before they shut down but I missed him. Getting information over the phone isn't gonna happen, I've already tried that. Needless to say, it's getting frustrating. I'll have friday off of work, so I will make an appointment to talk with the guy. He knows his stuff, he's just hard to catch.

I'm simply posting here trying to get some pointers on where to get started. If it isn't obvious, my illustrations show my ignorance. I am willing to learn though in order to do it correctly.
Sorry. I thought they gave you drawings like that.

Concrete, just like your metal toolings, does not react well to sharp corners. Think of how you bevel and ease corners and drilled holes to eliminate any sharp, 90 degree corners. Same thing, only with concrete you make the bevels much longer.
__________________
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Willie T
Willie T is offline   Reply With Quote
Old 01-27-2010, 04:08 PM   #25
Lost..
 
Join Date: Oct 2009
Location: AL
Posts: 280
Rewards Points: 0
Default

Concrete slab question


Quote:
Originally Posted by Willie T View Post
Sorry. I thought they gave you drawings like that.

Concrete, just like your metal toolings, does not react well to sharp corners. Think of how you bevel and ease corners and drilled holes to eliminate any sharp, 90 degree corners. Same thing, only with concrete you make the bevels much longer.
Maybe when I visit Friday, they will have some drawings there at the office or some pictures that will more acurately explain what they require. I'll be sure to ask.

In the mean time I have a feeling I may be needing a plumb bob. Haven't seen one in years since my dad was still alive, but I think I can spin one out on the lathe. I guess all it really needs to be is a pretty heavy metal piece with a point turned on it and a loop on the top to attach the string to.
J S Machine is offline   Reply With Quote
Old 01-27-2010, 04:14 PM   #26
Old School
 
Willie T's Avatar
 
Join Date: Jan 2009
Location: St. Petersburg, FL Minds of moderate caliber ordinarily condemn everything which is beyond them.
Posts: 3,634
Rewards Points: 0
Default

Concrete slab question


I've actually used a big nut on a string before.
__________________
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Willie T
Willie T is offline   Reply With Quote
Old 01-27-2010, 04:32 PM   #27
Member
 
Join Date: Nov 2009
Location: central virginia mountains
Posts: 1,857
Rewards Points: 0
Default

Concrete slab question


me to the nut was my brother
tpolk is offline   Reply With Quote
Old 01-27-2010, 05:22 PM   #28
Concrete & Masonry
 
Join Date: Nov 2008
Location: Wisconsin
Posts: 2,720
Rewards Points: 0
Default

Concrete slab question


Check out this thread for more info:

Concrete Footings for a Detached Garage???

Posts #2, 4 & 8 all have good images, except in post #8, your bottom dimension would be 12" instead of 18". If you do some more searching, I know there have been some other good images of grade beam slabs on the last year or so.
jomama45 is offline   Reply With Quote
Old 01-27-2010, 06:17 PM   #29
Member
 
Join Date: Jan 2009
Location: South of Boston, MA
Posts: 17,248
Rewards Points: 0
Default

Concrete slab question


Quote:
Originally Posted by J S Machine View Post
Its right under my username folks..

36092
I don't know many people who know zip codes, or that will look them up
I know I don't look up zip codes
Might want to add your location to your profile
Its the 1st question a lot of people ask before they reply
Scuba_Dave is offline   Reply With Quote
Old 01-27-2010, 06:51 PM   #30
Old School
 
Willie T's Avatar
 
Join Date: Jan 2009
Location: St. Petersburg, FL Minds of moderate caliber ordinarily condemn everything which is beyond them.
Posts: 3,634
Rewards Points: 0
Default

Concrete slab question


Scuba Dave is absolutely right.

7 4 17 4 - 8 18 - 22 7 24 - 8 19 - 8 18 - 1 4 19 19 4 17 - 19 14 - 18 15 4 11 1 - 18 14 12 4 19 7 8 13 6 -
14 20 19 - 8 13 - 15 11 0 8 13 - 11 4 19 19 4 17 18.

Translation:
(Here is why it is better to spell something out in plain letters.)

__________________
"True eloquence consists in saying all that is necessary, and only that which is."
François Duc de La Rochefoucauld
Willie T

Last edited by Willie T; 01-27-2010 at 07:06 PM.
Willie T 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
Concrete slab question mudpaws Flooring 2 10-18-2009 07:38 AM
concrete grade/bond beams under slab? jklingel Building & Construction 7 12-22-2008 12:43 PM
pouring a level concrete slab over sloped concrete Jayne Building & Construction 4 05-11-2008 08:55 AM
replace porch post on concrete slab maa40 Building & Construction 2 03-23-2008 10:50 AM
Garage Concrete Slab...HELP? Aqua-Man Building & Construction 2 06-17-2005 01:11 PM




Top of Page | View New Posts

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