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Building with Allan Block - Step Ups
Building step ups is an easy way to create more usable space and enhance the look and feel of your landscape.
When working with step ups you will need to dig a trench that is deep enough
to accommodate the base material
and extends into the slope far enough to bury one full block.
To begin, Start digging the base trench at the lowest elevation specified on the approved plans.
The minimum width for a base trench is twenty- four inches.
The depth of the trench is determined by allowing for six inches of base material
plus one inch per foot of wall height.
For this example we are building a two and a half foot wall that will require
six inches for the base material and an additional two and a half inches for the buried block
giving us a total trench depth of eight and a half inches.
If a slope is present below the wall, Contact a local engineer for assistance.
compact and level the base trench making a minimum of two passes with a mechanical plate compactor.
then place the drainpipe at the lowest possible point toward the back of the
trench that can be vented to daylight every fifty feet.
Place a minimum of six inches of wall rock in the base trench and check for level.
then compact the base making a minimum of two passes
Then excavate the second step making sure to accommodate for the base material and buried block.
compact and level the step up area
Lay in the base course of blocks on the first step up location and check for level.
then fill the hollow cores and twelve inches behind the block
as well as the base area of the second step up with wall rock. Then back fill with
approved on-site soils,
make sure that the blocks and the base of the second step up are level.
Compact behind the block in a path parallel to the wall, working from the
back of the block to the back of the backfill area.
Make a minimum of two passes with a mechanical plate compactor.
Then excavate the next step up making sure to accommodate for the base material and buried block.
Then compact and level the step up area
Lay in the base course of blocks on the second step up location and check for level.
then fill the hollow cores and twelve inches behind the block as well as the
base area of the second step up with wall rock.
make sure that the blocks and the base of the next step up are level.
Run the plate compactor over the top of the blocks where there are two or more
courses and behind the block where there is only one course.
Continue compacting the wall rock behind the wall as well as the
excavated area of the next step up
Continue this process to the top of your wall
Excavate the next step up area
compact and level the trench
Lay in the base course of blocks on the previous step up location and check for level.
then fill the hollow cores and twelve inches behind the block as well as the
base area of the next step up with wall rock.
Then backfill with approved on-site soils,
Check the blocks and the base of the next step up for level.
Run the plate compactor over the top of the blocks where there are two or more
courses and behind the block where there is only one course. Making a minimum of two passes
Keep in mind the block at each step up must be completely buried to maintain
the proper base depth and to prevent wall failure due to erosion.
To enhance your project view the other Building Options or visit us at allanblock.com