Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Landscaping & Lawn Care

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-23-2012, 01:57 PM   #1
Newbie
 
Join Date: Feb 2012
Posts: 3
Rewards Points: 10
Default

Courtyard wall - subbase question


I'm going to build a 5' courtyard wall that will double as a retaining wall (no slope). I live in Phoenix, AZ and the previous owner had built a 2' retaining wall out of natural rock/boulders without any gravel backfill or fabric, so dirt continually washes through the wall. The wall separated two different levels of the yard, but there is no slope. So, I'm replacing this "rock wall" with a wall consisting of a concrete/rebar-reinforced base utilizing 8" CMUs with a stucco finish on the exposed sides.

My question is the subbase of the footer.....I'm trying to re-use as much of the onsite materials as possible, and there is a lot of 3/4" granite with smaller aggregate mixed in. I was thinking of having some 1/4 minus or sand delivered to mix in to make it more compactible. Will this 3/4" mix be suitable as a subbase or should I just go with an ABC mix?

Re-using the 3/4" granite will save $ by not paying to have the 3/4" granite hauled away and having to buy ABC, but I don't want to compromise the project. And I already plan on using the 3/4" granite for backfill/drainage, and will still have plenty.

Any other advice?

Thanks for your help!
Pbody

Pbody is offline   Reply With Quote
Old 02-26-2012, 12:44 PM   #2
Master General ReEngineer
 
Bondo's Avatar
 
Join Date: Dec 2007
Location: Chaumont River, Ny.
Posts: 3,738
Rewards Points: 2,110
Default

Courtyard wall - subbase question


Ayuh,.... I can't feature why the 3/4" stone won't compact, All by itself....

Pound it with a plate-tamper, 'n get to buildin' yer walls....

Bondo is online now   Reply With Quote
Old 02-27-2012, 10:02 AM   #3
Newbie
 
Join Date: Feb 2012
Posts: 4
Rewards Points: 10
Default

Courtyard wall - subbase question


Hey there, I don't know how helpful this is but this site has a lot of data on retaining walls: http://www.retainingwallsusa.com/ could be a good resource.
jerrywoods2011 is offline   Reply With Quote
Old 02-27-2012, 01:39 PM   #4
Member
 
concretemasonry's Avatar
 
Join Date: Oct 2006
Location: Minneapolis/St. Paul, Minnesota - Latitude 45.057 Longitude -93.074
Posts: 3,820
Rewards Points: 2,128
Default

Courtyard wall - subbase question


Since you are building a 5' high wall that also retain some soil, you will need a concrete footing or else you could end up with 5' wide sidewalk and hopefully no one will be under it. Depending on the height of the unbalance backfill retained, you have to make the concrete footing wider.

You should have a compacted base under the concrete footing. Clean 3/4" rock does not really compact in the long term (but adding some 1/4" minus and/or coarse sand can help) Any clean rock seems to work at first, but it can be pushed into the existing soil. Your existing soil may be acceptable if compacted (if slightly dampened) with a heavy plate on and pole or pipe and a lot of sweat or just rent a vibratory compactor.

Dick
concretemasonry is offline   Reply With Quote
The Following User Says Thank You to concretemasonry For This Useful Post:
AndyGump (02-27-2012)
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
Open Web Truss/ Load Bearing Wall Question rlc2052 Flooring 3 03-05-2010 10:37 AM
Question about removing trim wall in foyer cary00silve Remodeling 1 02-02-2010 01:02 PM
Framing Question: How thick the wall that carries plumbing? jaes Carpentry 5 06-18-2008 06:39 PM
Basement knee wall question vugger Building & Construction 2 01-05-2008 10:02 PM
Garage wall construction question Bjonas Building & Construction 4 01-01-2008 05:18 PM




Top of Page | View New Posts

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