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Old 04-17-2010, 09:46 PM   #1
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Wall construction material estimate


I have a 1,000 sq meter lot that I wish to put a fence around. The fence will be 2 ft below ground and 6 ft above ground for a total of 8 ft tall. Can anyone give me an estimate of the number of hollow blocks, sand bags, cement bags, and rebar that I will require? Just an estimate of materials and no costs. Thanks William

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Old 04-18-2010, 03:38 PM   #2
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Wall construction material estimate


You should be able to figure this out based on the type of fence you're installing.
Have no idea what hollow blocks and rebar would be for.
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Old 04-18-2010, 05:01 PM   #3
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Wall construction material estimate


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Originally Posted by williamdk View Post
I have a 1,000 sq meter lot
The perimeter length depends on the shape of the lot. For a square lot it's 415'.
How thick is the fence/wall?
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Old 04-19-2010, 02:44 PM   #4
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Wall construction material estimate


Shape of the perimeter??? 1000 meter lot....rectangular in shape.....hollow block wall 10 ft total tall...one hollow block thick... I don't know much about construction, but i'm assuming the similiest way to figure the number of hollow blocks would be to divide the length of the hollow block into the distance around a 1,000 sq meter lot, ryt? Times 10 for 10 ft tall?
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Old 04-19-2010, 03:13 PM   #5
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Wall construction material estimate


You need to figure in a lot more than you seem to be looking at.

First, you will need a footing for the full distance (And it will likely have to be much deeper than you are thinking since you sound like you are in Canada?) Then rebar for that footing.

Don't forget excavation and compaction costs.

And drainage considerations with the required bedding and backfill

Next will come solidly poured columns at specifically determined intervals... and corners... and gate sides. Also needing required rebar. Your building department will specify all this.

Then you will need to figure concrete and rebar for a continuous tie beam around the top.

Then wire row ties... usually every other course.

You'll need to figure mortar too.

So, I think you can see why there needs to be a plan drawing before any serious attempt at estimation can be attempted.
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But if you simply want to horseback a block count:

Measure the height and length of the wall using your tape measure, and multiply to find the total surface area in square feet.

Example: A wall measuring 20 feet long by 10 feet high has a surface area of 200 square feet.

Multiply the length of the block you are going to use by its width to find its surface area. Divide 144 (the number of inches in a square foot) by the surface area of the block to calculate the number of blocks per square foot.

Example: An 8-inch by 16-inch concrete block has a surface area of 128 square inches; 144 divided by 128 is 1.125 blocks per square foot.

Multiply the total square footage of the wall surface by the blocks per square foot to find the amount of blocks for the wall. Multiply this number by 1.06 to add a 6 percent waste margin to find the total number of blocks needed for the wall.

Example: A 200 square foot wall multiplied by 1.125 blocks per square foot needs 225 blocks. Allowing for 6 percent waste results in 239 total blocks.

You can do the metric conversion........ I only work in feet and inches.
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Last edited by Willie T; 04-19-2010 at 03:23 PM.
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