first course of engineered retaining wall

Old 10-09-10, 02:03 PM
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first course of engineered retaining wall

We have layed our first course being careful to level each block in all directions with a 18 inch level. Now we have checked the first layer will a 4 ft long level and can see that we are off 1/4 of an inch in several places. Does anyone know how exact we need to be? We really don't want to start over after 6 hours but will if it means the wall won't end up straight.
Old 10-09-10, 07:25 PM
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Most modular retaining wall blocks are wonderful in their ability to accommodate misalignment and settling but from experience I know that a nice level starting row makes setting the blocks on top much easier. You will have to consult the specs for your retaining wall block to find out what they find acceptable but two or three courses up if the blocks don't fit together... you know why.

My advice though is to make the starting row as perfect as possible. The extra effort there is paid back as you build up the wall.
Old 10-11-10, 03:29 PM
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I think 90% of the work in a retaining wall is the first course

The 4' level is the right tool, the 18" was too short

I'd go back and make this level now

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