TECHNICAL INFORMATION | FAQ
1.
 xHow high can Keystone walls be built without the use of geogrid?
2.
 xAre concrete footings ever necessary or required?
3.
 xCan I use sand to help level the units?
4.
 xCan adjustments be made on a concrete leveling pad?
5.
 xHow many Keystone units should be buried?
6.
 xIs there a way to figure how much setback there will be per course before construction of the wall begins?
7.
 xShould I always begin construction at one end of the wall or is it o.k. to start in the middle?
8.
 xWhat size rock is best suited for filling in and around the Keystone units in the drainage zone?
9.
 xHow much rock do I need to use?
10.
 xWhat advantages are there to using a pinned system?
11.
 xHow high can Keystone units be stacked before placing unit corefill and backfill?
12.
 xWhat type of material should be used to backfill?
13.
 xHow often do I need to compact the fill soils?
14.
 xHow often should the wall’s alignment be checked?
15.
 xHow can I fix units that are out of level?
16.
 xHow can units that are out of alignment be fixed?
17.
 xWhen building gravity walls with terraces, what is the recommended distance between the terraced walls
xwhere the upper wall does not affect the loading condition on the lower wall?
18.
 xWhat are the recommended methods to avoid settlement when building a wall that has terraces converging
xinto a single wall?
19.
 xWhen building around a structure or culvert, how do I know if the courses will match on top?
20.
 xWhen cutting for a round culvert or multi-plate arch, is it necessary for the whole Keystone unit to remain
xintact, and what is the best way to secure the unit?
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