Brickwork rate analysis|3 materials

Brickwork rate analysis can be calculated by estimating materials cost ,labour cost,water charges and by adding contractor profits.

Brickwork materials

Brickwork is a fundamental component of construction, providing both structural integrity and aesthetic appeal.

Conducting a thorough rate analysis of brickwork is essential for accurate cost estimation, resource allocation, and project planning.

This article delves into the various aspects of brickwork rate analysis, covering materials, labor, and other contributing factors to offer a comprehensive understanding of this crucial process.

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Understanding Brickwork

Brickwork involves laying bricks in mortar to construct walls, pavements, and other structures. The quality and efficiency of brickwork are influenced by the type of bricks, mortar mix, and workmanship.

Rate analysis helps in determining the cost per unit volume (usually per cubic meter) of brickwork, ensuring that projects stay within budget while meeting required standards.

Components of Brickwork Rate Analysis
Materials:

1. Bricks: The type, quality, and quantity of bricks significantly impact the overall cost. Common types include clay bricks, fly ash bricks, and concrete blocks. The size of bricks also varies, influencing the number of bricks required per cubic meter.
2. Mortar: Mixing cement, water and sand in proportions becomes mortar. The proportion of these components affects the strength and cost of the mortar. The standard mix ratio for brickwork mortar is 1:6 (cement) for general purposes.
3. Other Materials: Water for mixing mortar and any additives to enhance mortar properties should also be considered.
4. Labor: The cost of labor depends on the skill level required for the task. Bricklayers, masons, and helpers each have different wage rates.
5. The productivity of labor, measured as the volume of brickwork completed per day, influences the labor cost per unit volume of brickwork.
6. Equipment: Tools and equipment such as trowels, hammers, spirit levels, and scaffolding are necessary for brickwork. The cost of renting or purchasing these tools must be factored into the rate analysis.
7. Machinery for mixing mortar, lifting bricks, and scaffolding setup also contributes to the cost.
8. Overheads: Indirect costs such as supervision, transportation of materials, site setup, and administration need to be included in the rate analysis.
9. Contingencies for unexpected expenses should also be accounted for, typically around 5-10% of the total cost.

Step-by-Step Brickwork Rate Analysis

Let us consider length of brick wall as 10m and height as 3m and thickness of wall as 230mm.

Considering bricks of size 230mm x 115mm x 75mm (9” x 4.5” x 3”) were utilized.

Estimating materials quantity

Volume of brick wall=10m x 3m x .23m=6.9 m3

Volume of 1 brick with out mortar=0.23m x0.115m x 0.075m=0.00198 m3

Volume of 1 brick with mortar=(0.23+0.01)m x (0.115+0.01) x (0.075+0.01) =0.24×0.125×0.085=0.00255m3, Considering 10mm thick mortar.

So total number of bricks required for 6.9 m3 volume brick wall=6.9/0.00255=2706 No’s.

Volume of 2706 No’s bricks with out mortar =2706 x0.00198=5.35 m3

Note: Volume of brick wall =Dry volume of bricks + volume of wet mortar

Volume of wet mortar = Volume of brick wall -Dry volume of bricks=6.9 m3-5.35m3=1.55m3

Note: Volume of dry mortar=1.33 x Volume of wet mortar

Volume of dry mortar=1.33 x 1.55 m3=2.06 m3

Quantity and Cost of Cement

So Volume of dry mortar for 6.9 m3 brick wall =2.06 m3

Considering cement ,sand ratio in brick wall is 1:4,Density of cement =1440 kg/m3

Quantity of Cement =2.06 x 1×1440/(1+4) =593.28 kgs =11.86 bags =12 bags

Considering cost of 1 cement bag= Rs 350.

So cost of 12 bags =350 x 12 =Rs 4200

Quantity and cost of Sand

Quantity of sand =2.06 x 4×1920/(1+4)=3165 kgs, Considering density of sand =1920kg/m3

Considering cost of sand is Rs 1600/MT

Cost of sand =3.165 MT x 1600 =Rs 5064

Cost of bricks

So 6.9m3 brickwall,2706 Nos red bricks are required.

Considering rate of 1 brick is Rs 7 ,So cost of 2706 bricks =2706 x 7 =Rs 18942

So Total cost of brick work =Cost of Cement + Cost of Sand + Cost of Bricks

= Rs 4200 + Rs 5064 + 18942

=Rs 28206

Labour Cost

For 1m3 1 mason and 1 helper is required

Assuming Cost of 1 mason is Rs 800 and cost of 1 helper is Rs 500

So for 6.9 m3 of brick work, nearly 7 masons and 7 helpers are required.

So cost of Labour =7×800 + 7×500=Rs 9100

So total cost of brickwork including labour =28206 +9100 =Rs 37306

Cost of 1 cum brickwork

So cost of 6.9 m3 brick work is Rs 37306

Cost of 1m3 brick work =37306/6.9= Rs 5407

Add 10% contractor profit to total cost = Rs 5407x 0.10=Rs 540.7

So Total cost of 1m3 brickwork =Rs 5407 +Rs 541 =Rs 5948

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