Slope On Concrete

 
Thread Tools Search this Thread Display Modes
Old 08-21-2009, 08:49 PM   #1
Registered User
 
m1brown's Avatar
 
Trade: floor finisher
Join Date: Mar 2009
Posts: 9

Slope On Concrete


quick question, if you were pouring a 37' slab to a drain how many inches of slope or drop would you give this slab , it is a mechanics shop. thank you

m1brown is offline  
Warning: The topics covered on this site include activities in which there exists the potential for serious injury or death. ContractorTalk.com DOES NOT guarantee the accuracy or completeness of any information contained on this site. Always use proper safety precaution and reference reliable outside sources before attempting any construction or remodeling task!

Old 08-21-2009, 08:51 PM   #2
Eater of sins.
 
ScipioAfricanus's Avatar
 
Trade: Designer/Drafter Extrordinaire
Join Date: Sep 2008
Location: Orange County, CA.
Posts: 1,239

Re: Slope On Concrete


I would find out what the plans say then go from there.

Andy.
__________________
www.draftinginoc.com
ScipioAfricanus is offline  
Old 08-21-2009, 08:58 PM   #3
Pro
 
cleveman's Avatar
 
Trade: custom home building
Join Date: Dec 2007
Location: Central Iowa
Posts: 1,792

Re: Slope On Concrete


3" of slope should do it in a perfect world. But if you have any low spots, they will be a problem. I sloped a 12' slab just 1" once and I had a puddle about 1/8" deep in the middle. I may have "floated" that low spot in, I don't know. Anyway, go 3" as a minimum and more is better.
cleveman is offline  
Old 08-21-2009, 09:22 PM   #4
LET ME SHOW YA SOMETHIN!!
 
CrpntrFrk's Avatar
 
Trade: I do that too!
Join Date: Oct 2008
Location: Globe, Arizona
Posts: 1,399

Re: Slope On Concrete


1/8" to 1/4" per foot is good rule of thumb
__________________
DO IT!! DO IT!! DO IT!!
CrpntrFrk is offline  
Old 08-21-2009, 09:28 PM   #5
Registered User
 
m1brown's Avatar
 
Trade: floor finisher
Join Date: Mar 2009
Posts: 9

Re: Slope On Concrete


thats exactly what i went 3 inches, the owner wanted 2 inches but we convinced him to go 3 inches , the building is actully 37 * 75 and a drain that is 35 feet long is in the center . The reason he didnt want much slope on it was because of the creapers that the mechanics use on the floor, we told him there will probably be low spots in the floor and he said that is what they make squeegies for , to get rid of the water . Now that concrete is hard and the low spots appear , he got a problem is there a percentage a fellow should use for future sloped floors for garages?
m1brown is offline  
Old 08-21-2009, 09:51 PM   #6
Pro
 
cleveman's Avatar
 
Trade: custom home building
Join Date: Dec 2007
Location: Central Iowa
Posts: 1,792

Re: Slope On Concrete


I guess the percentage would be a minimum of 1" for every 12' is 1/120 which is .8333 percent. So just go one percent to be on the safe side, as a MINIMUM.
cleveman is offline  
Old 08-21-2009, 09:55 PM   #7
Registered User
 
m1brown's Avatar
 
Trade: floor finisher
Join Date: Mar 2009
Posts: 9

Re: Slope On Concrete


thanks everybody for the quick answers
m1brown is offline  
Old 09-13-2009, 02:54 PM   #8
Registered User
 
BluestoneInc's Avatar
 
Trade: Construction
Join Date: Jun 2009
Location: Minot, ND
Posts: 2

Re: Slope On Concrete


3 inches would do it if you can screed the floor flat enough. 1/4" per foot is way to much. There tool boxes will roll to the center of the floor!
BluestoneInc is offline  
Old 09-13-2009, 04:06 PM   #9
Twisted Cameron
 
scrapecc's Avatar
 
Trade: Concrete, Metal buildings
Join Date: May 2009
Location: Yorkville Il
Posts: 312

Re: Slope On Concrete


anything over 1 inch in 10 feet will usually develop "bird baths". Thats as far as i will usually push it without telling the customer that they will have puddles.
scrapecc is offline  


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 Company delivered junk concrete. How best to pursue? marcomjl Concrete & Paving 46 08-07-2011 02:55 PM
4x4 posts in concrete vs. saddles Strongarm Decks & Fencing 20 08-31-2009 10:41 PM
I need a to pour 1/4 yard of black concrete... ruskent Masonry 9 05-25-2009 12:50 PM
Advice - concrete Pool Deck coping ejleonard Masonry 4 06-17-2008 05:18 PM

Join Now... It's Fast and FREE!

Privacy Badge
I am a professional contractor
I am a DIY Homeowner
ContractorTalk.com is for
PROFESSIONAL CONTRACTORS ONLY!

At ContractorTalk.com we cater exlusivly to professional contractors who make their living as a contractor. Knowing that many homeowners and DIYers are looking for a community to call home, we've created www.DIYChatroom.com DIY Chatroom is full of helpful advices and perfect for DIY homeowners.

Redirecing in 10 seconds
No Thanks
terms of service

Already Have an Account?