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How to estimate concrete hollow blocks or CHB

A wall has a dimension of 35 meters long and and 7 meters high specify the use of 15 cm. concrete hollow blocks. Prepare a comparative bill of materials for CHB.


15 x 20 x 40 cm. CHB wall
find the area of the wall
A= 35 x 7
A= 275 sq. m.

1 sq. m. of a wall consist of 12.5 pcs of CHB

275 x 12.5 = 3,437.5 pcs of CHB

14 comments:

Powertrack said...
This comment has been removed by the author.
Powertrack said...

Thanks for the good example. This will be useful for checking and calculating new construction works on hollow blocks.

Jun said...

What is cheaper a concrete wall or a combination of concrete and mesh wire

Unknown said...

35 x 7 is not 275 sq m. computations are way off.

RPD thesis said...

standard computation of cement and sand for one hollow block????

jhon said...

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Unknown said...

Is there any other standard of computation in using CHB? I read on other article that 10pcs of CHB for 1 sq.m., and this article is difference?

Unknown said...

35*7 is not 275, it's just 245. Be thoughtful in giving ideas pls.

Unknown said...

yes i noticed that the computation has an error

Unknown said...

35 x 7 = 245
245 x 12.5 -= 3062.5 CHB

What kind of Computations do you have?

Unknown said...

How do u get 12.5?

engr jho said...

1sq.m wall area / 0.08sq.m chb area = 12.5pcs of chb

engr jho said...

if you have 35m X 7m wall, you need to find the area of your wall, 35X7=245sq.m,

Then, 245sq.m X 12.5pcs of chb = 3,062.5 pcs of CHB

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