I have 250sq m lot. I want to calculate how many hollow blocks I need (Paikot). 10 feet ang height ng wall.
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calculate how many hollow blocks I need
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Re: calculate how many hollow blocks I need
The critical dimension to know is the length and width of the lot, to determine the perimeter. If squarish, each side of the lot will be approximately 16 meters.
Perimeter times height equals the number of square meters of wall. So 16 meter length of each side times 4 sides times 3 meter height equals 192 square meters.
Each square meter of hollow block wall needs 12.5 pieces of hollow blocks or you need 2,400 pieces.
But you need to remove the area of the posts required for the wall from the computation.
To compute for the amount of cement and sand to fill and set the blocks, multiply the number of square meters of wall by .525 bags of cement and .0437 cubic meters of sand. This is for 6" CHB.
So your wall will require approximately 101 bags of cement and 8.5 cubic meters of sand.

Re: calculate how many hollow blocks I need
Ask ko na rin po, what if 4" CHB? How many bags per sq.m will be used?
Yun po bang 0.525 bag per sq.m na 6" kasama na palitada nun or pang fill lang yun?
How about sa floor? What is the standard thickness and papano yung mixing (sand/cement) or yung consumption niya?
Many thanks
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Originally posted by Jasper Pilongo View PostGood day sir...
may i ask how much hollow blocks, cement, gravel and sand do i need to build a 10 foot tall fence around my 500sq mtr lot that measures about 25 meters x20 meters?
How deep should i lay it down and how many layers of 6" CHB should be under the ground?
How deep the foundation is depends on the geology of your property. It has to be deeper if you have soft alluvial soil. Less deep if it is hard and rocky.
It is better to have an qualified engineer to visit your site and get his assessment.
Don't just follow the advice of anyone who don't know what is the actual situation on the ground (no pun intended). 10 feet is almost twice the height of an average person. If you build your foundation too shallow, or pillars are too thin, or reinforcements are under spec, you increase the risk of the wall collapsing.
If it does collapse and someone gets hurt, you will end up spending more than if you did it right from the very start. Not to mention possible lawsuits.
Last edited by joey81; 02102017, 02:30 PM.
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