Independent step construction method presented for circumstances where the elevation changes result in a modified riser height. The use of Gator Grid – biaxial geogrid – for soil stabilization is presented.
STEP 1: Install geotextile fabric above the subgrade to keep the base from migrating into that soil.
We used Gator fabric by Alliance Gator (http://www.flex-lock.com/)
STEP 2: Add a drain tile elbowed to the dry well, that is sitting in a bed of 4-inch thick #57 stone.
STEP 3: Place 8 to 10 inches layer of base consisting, again, of #57 stone.
STEP 4: Put another layer of Gator Fabric to keep the bedding layer of ¼ inch clean stone (#8) from migrating into the voids of the #57 stone.
STEP 5: Install first step with one row of units below grade. Build the steps vertically using Techo-Bloc patented clip system for optimum alignment.
We used the Raffinato polished 7-inch unit from Techo-Bloc.
STEP 6: Add clean stone (#57) stabilized with a biaxial grid system behind the step.
We used the Gator Grid from Alliance.
STEP 7: Build the subsequent steps in a modular system, which means that each unit bridges the previous one in order to resist settlement.
Here’s the final result:
FIND OUT MORE ABOUT CONSTRUCTION DETAILS AND OUR COLLECTION OF STEPS