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I Would Like To Create A Circular Flower Garden In My Backyard, And Really Like The Look Of The Retaining Wall Stones That Have Become So Popular. I Need To Know A Simple Calculation Or Some Websites That Will Help Me Calculate The Needed Materials. I Also Need Help In The Keeping The Spacing Exact Enough To Make Both Levels Come Out To An Exact Block Count. This Is To Prevent Having To Cut The Blocks. The Retaining Wall Blocks Have A Lip On The Back And Bottom Of The Block And Will Cause The Circle To Get Smaller As Each Layer Goes On. Should I Just Chisel Off The Lip, Since The Blocks Really Will Not Be Supporting Much Weight?

Answer»

It will not be exact, but measure the length of the block and divide it into the perimeter of the bed. Many of the blocks are longer along the midline of the length for FLEXIBILITY. Adjust the perimeter to come up with whole blocks. A bed sixteen feet in diameter WOULD have a perimeter of 50 feet, divided by the 16-inch length of a block would require APPROXIMATELY 37 blocks to lay the perimeter. Each course of blocks would take the same number. You CALCULATE the perimeter by multiplying the diameter by pi. Leave the lip in place because it seems that even a 3-course wall looks NICER with the setback. Of course, it is up to you.

It will not be exact, but measure the length of the block and divide it into the perimeter of the bed. Many of the blocks are longer along the midline of the length for flexibility. Adjust the perimeter to come up with whole blocks. A bed sixteen feet in diameter would have a perimeter of 50 feet, divided by the 16-inch length of a block would require approximately 37 blocks to lay the perimeter. Each course of blocks would take the same number. You calculate the perimeter by multiplying the diameter by pi. Leave the lip in place because it seems that even a 3-course wall looks nicer with the setback. Of course, it is up to you.



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