Materials tools and site.
10 foot concrete retaining wall.
Once the excavation is done i ll need a 10 foot retaining wall.
One key aspect of retaining wall construction is preparing a solid footing or foundation.
How to build a concrete wall prep work.
If you have your retaining wall built figure about 15 per square face foot for a timber wall 20 for an interlocking block system or poured concrete and 25 for a natural stone wall.
It took a day to rip out the old collapsing retaining wall to dig farther into the hill to provide room for the backfill gravel and to help unload materials.
At the very least remember to follow the system manufacturer s instructions to the letter.
My plan for the retaining wall is to dig holes 6 feet deep by 12 inch diameter full with concrete and plant 18 foot 4 inch steel square tubes with a 1 4 inch wall every 8 feet.
Preparing a troublesome site one that includes clay soil or a natural spring for example can raise costs substantially.
For walls taller than 4 feet hiring a licensed engineer to develop a design would be a smart move.
Thoroughly planned and ably performed wall construction will help to ensure the retaining wall s stability.
The footing is usually made of poured concrete but in some situations homeowners may instead opt to simply use tamped earth or a gravel base.
The 8 foot wall actually needs to be four times stronger.
Retaining wall cost the average cost of building a retaining wall is 5 421 most homeowners find themselves spending between 3 186 and 8 453 the cost of retaining wall materials ranges from 3 to 40 per square foot wall block prices fall between 10 and 15 per square foot while precase poured concrete runs 20 to 25 wood falls in the middle at 15 to 25 per square foot.
Then bolt steel flat slats about 6 inches wide to the tubes.
Retaining wall material can range in price from 10 40 per square foot with some material options including cinder block wood interlocking concrete block natural stone or poured concrete.
In general the top of the stem of any cast concrete retaining wall should not be less than 12 inches for the proper placement of concrete.
For example a retaining wall 8 feet tall is not just twice as strong as a wall 4 foot tall.
Backfilling with a clay soil instead of sand can increase the load by double or more while going from an 8 foot to a 10 foot wall just a 25 height increase adds 50 to the lateral pressure.
Soil type and backfill height both affect the lateral pressure on a basement wall.
An average brick retaining wall that is 30 feet long and 4 feet high without any built in steps or extra reinforcements is typically around 4 220 the average homeowner will pay 35 per square foot and spend between 2 450 and 6 650 to build a retaining wall.
The slope is about a 50 degree angle.