Updated August 19th, 2020
When you plan to make brick walls on a building floor, the first step is to estimate the brickwork quantity and the second step is to calculate the required materials for the brickwork.
You then need to purchase and stack the materials on your project. Then you can start making brick walls.
We make different thicknesses of brick walls on a building floor. The thickness can be 3 inches, 5 inches, and 10 inches.
We normally make 10 inches thick brick walls on the periphery and 5 inches thick in internal walls. 3 inches thick brick wall is rarely made on a building floor.
In this post, I’ll discuss how to calculate materials for 5 inches thick brick wall.
Let’s first see what materials we need to make a 5 inches thick brick wall.
Materials Required to Make a 5 Inches Thick Brick Wall
We mainly need the following three materials–
Brick: First class bricks are used to make brick walls. The standard size of bricks is 9½″ × 4½″ x 2¾″.
Related: Requirements of Good Quality Bricks
Cement: Portland cement is normally used in brickwork. The weight of a cement bag is 50 kilogram which is equal to 1.25 cubic feet.
Sand: Normally medium sand is used.
You just need to calculate these three materials for making a brick wall.
For calculating materials, you first need to estimate the brickwork quantity.
Let’s see how we can estimate brickwork.
How To Estimate Brickwork?
Estimating brickwork is easy. You just need to get the length and height of a wall and then multiply both measurements.
But on a building floor, there are many walls and there are also many wall openings.
You need to deduct the wall opening from the brickwork quantity to get the actual quantity of brickwork.
The thing is you need to get the actual quantity of brickwork to calculate the required materials. The unit of brickwork will be in square feet.
For the sake of our tutorial, let’s assume we got a 10 feet long and 10 feet width brick wall. We need to calculate the materials for this wall.
So, the quantity of brickwork for the wall is,
= 10’ x 10’
=100 square feet.
So, we’ll calculate materials for this 100 square feet brickwork.
How To Calculate Bricks For 5 Inches Thick Brick Wall
Calculating bricks is a little bit tricky. You first need to calculate the volume of the brickwork and divide that volume with the volume of a brick. The brick volume should be including mortar.
Don’t be panic. At this moment, you’re thinking that there is a lot of works to calculate the materials for 5″ thick brick wall. But it isn’t.
I’m just describing the process. Once you become familiar with the process, it’ll be easy.
After describing the process, I’ll show you a quick trick. So that you don’t need to go through this process every time. You can do that instantly just multiplying a constant with the brickwork quantity.
Calculating The Volume Of Brickwork
The volume of our estimated brickwork is,
= 100 sq.ft x 5″
= 100 sq. ft x 0.42 (5″ equal to 0.42 feet)
= 42 cubic feet.
Calculating The Volume Of A Brick (Including Mortar)
The standard brick size is, 9½″ x 4½″ x 2¾″.
When we make a brick wall, we normally use ½” thick of mortar in between bricks for jointing. Including that mortar joint, the brick size will be, 10″ x 5″ x 3″.
So, the volume of a brick (including mortar) is,
= 10″ x 5″ x 3″
= 0.087 cubic feet.
Now we can calculate the number of bricks for our estimated brickwork.
Number of bricks = Volume of brickwork ÷ Volume of a brick (including mortar)
=42 ÷ 0.087
Due to wastage during carrying and working, we take this number as 500.
So, the required numbers of bricks for 100 square feet brickwork is 500.
Calculating Cement And Sand Quantity For 5 Inches Thick Brick Wall
Cement and sand are used to make mortar. So, for calculating cement and sand, you first need to calculate the required mortar volume for your estimated brickwork.
So, How can we calculate mortar for brickwork?
To calculate mortar volume you first need to get the total volume of bricks used to make brick walls. Then you need to deduct the bricks volume from the volume of brickwork.
Mortar volume = brick wall volume – bricks volume.
We use 482 numbers of bricks to make our brick wall.
So, the volume of these bricks are,
= 482 x 9½″ x 4½″ x 2¾″.
=482 x 0.79’ x 0.37’ x 0.23’
=32.40 cubic feet.
The brick wall volume we calculated above is 42 cubic feet.
So, the mortar volume is,
=9.60 cubic feet.
This is the mortar volume we actually need to make our brick wall.
Now we need to calculate the cement and sand quantity required to prepare this mortar volume.
For this, you first need to know which proportion of cement and sand you’ll use to prepare mortar.
The commonly used cement-sand proportion to make 5″ thick brick walls is 1:4.
So, we’ll calculate cement-sand for our brick wall based on this proportion.
The mortar volume we require to make our brick wall is 9.60 cubic feet which we calculated above.
But this is the wet volume of mortar. To calculate cement-sand volume we need to get the dry volume of this wet volume.
Dry volume of mortar is,
= wet volume of mortar x 1.30
= 9.60 x 1.30
= 12.48 cubic feet.
You can ask me what is the 1.3 to get the dry volume of mortar. I’ve talked about this before on the post “How to get the dry volume of mortar?”.
As you got the dry volume of mortar, you now can calculate the cement and sand volume. To calculate, you just need to get the sum of the ratio of cement and sand.
The ratio is 1:4.
The sum of the ratio is,
Cement volume is,
=(dry volume of mortar ÷ sum of the ratio) × cement proportion in the mortar mix.
=2.50 cubic feet.
The cement is found as a 50-kilogram bag in the market. And the volume of a bag of cement is 1.25.
So, we need (2.50÷1.25)= 2 bags of cement for our estimated brickwork.
The sand volume is,
= (dry volume of mortar ÷ sum of the ratio) × sand proportion in the mortar mix.
=10 cubic feet.
Required materials for 100 square feet brickwork –
Brick: 500 numbers.
Cement: 2 bags.
Sand: 10 cubic feet.
A Quick Tricks To Calculate Materials For 5″ Thick Brick Wall
This is a long calculation. You may think that you need to go through this process every time when you want to estimate materials for a 5″ thick brick wall.
But you don’t.
You can apply a quick trick.
Let me show you.
In this post, we have calculated the required materials for 100 square feet of 5″ thick brick wall. And the required materials for this is,
Bricks– 500 numbers
Cement– 2 bags
Sand – 10 cubic feet
So, for 1 square feet brick wall, the required materials are,
Bricks– 5 numbers
Sand–0.10 cubic feet.
You can now calculate materials for any quantity of brickwork. J
For example, if you want to calculate materials for 50 square feet of brickwork, the required materials are,
Bricks= 50×5=250 numbers
Cement= 50×0.02= 1 bag
Sand=50×0.10=5 cubic feet.
To calculate materials for 5″ thick brick wall, you first need to estimate the brickwork quantity. And then get the required numbers of bricks.
After that calculate the volume of the required numbers of bricks and the volume of estimated brickwork.
And then deduct the volume of bricks from the volume of brickwork to get the required mortar volume.
Once you get the mortar volume, get the dry volume of that.
Now you can calculate the cement and sand quantity based on the cement-sand ratio used in the mortar.
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