Poured concrete retaining wall

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  #1  
Old 06-23-09, 09:03 AM
J
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Poured concrete retaining wall

Hey all,
I need a 2' retaining wall on the side of my yard. It will be 16' long and a corner, with another 6' to the house and 8" thick. I live in Denver, so some cold but not really much. My questions are:
Do I need a footer for a two foot wall?
If one end is almost completely buried and one end exposed, is two foot tall enough, or should it be 3' with one foot mostly buried?
Here is a picture of the area in mention.

<a href="http://www.flickr.com/photos/91792996@N00/3654319564/" title="IMG_0226 by jmwands, on Flickr"><img src="http://farm4.static.flickr.com/3635/3654319564_cf97ae410d.jpg" width="500" height="375" alt="IMG_0226" /></a>
Thanks in advance,,,


JM
 
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  #2  
Old 06-29-09, 08:55 AM
S
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footing depth and dimensions will depend on the frost line in denver. your local planning department may have literature and boilerplate drawings on this.

rule of thumb is: a footing should be at least as thick as the wall it supports and twice as wide.

here's my opinion, although it will probably be contested:

make the footing 12" thick and 24" wide. put (2) #5 rebar hoizontally in the footing, and stub #5 verticals every 32". the verts will be integrated into the block wall. make the top of your footing 8" below grade.

lay four courses of 8x8x16 block, with horizontal #5 rebar in the bottom and top block courses, and 90-degree bends at the corner.

fill the block with concrete.

consider adjusting your heights to add a cap to the top of the wall, since it appears that you want a nice patio/seating area, and no one wants to see the top of a block wall.

also, block don't have to be simply smooth and gray. they come in various colors and textures. check with your local masonry supplier.
 
  #3  
Old 06-29-09, 09:50 AM
J
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Sleeper in Seattle,,, thanks for the input. I am actually going to pour a wall, not use blocks. But i guess the rules will be similar. I just wondered if much of a footer was needed on such a short wall. I haven't gone to the city yet, but I think I will.
Thanks again for the input,

JM
 
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