Question

Estimate the total cost for furnishing and installing standard size brick (6.75 bricks/SF) in a running bond pattern for the above referenced building 300 feet long, 200 feet wide and 12 feet high. Calculate only the brick units and the mortar required.

a. Total area of wall openings: 650 SF

b. Brick waste factor: 5%

c. Mortar required per 100 SF: 7.2CF/CSF

d. Mortar waste factor: 40% e. Productivity Rates: 12.0 Mason-hours/1000 brick and 13.0 Laborer-hours/1000 brick

f. Wage Rates: Masons – $28.00/hr and Laborers - $22.00/hr

g. Material Costs: Brick - $615/M and Mortar - $140/CY

GROSS WALL AREA SF /1 NET WALL AREA SF - ?

TOTAL BRICK REQUIRED BRK /1 BRICK MATERIAL COST $ LS - ?

TOTAL MORTAR REQUIRED CF /1 MORTAR MATERIAL COST $ LS - ?

TOTAL MATERIAL COST $ LS /1 MASON HOURS REQUIRED HRS - ?

LABORER HOURS REQUIRED HRS - ?

TOTAL LABOR COST $ LS - ?

TOTAL COST $ - ?

Answer 1

Solution as follows:

Given Data
Bricks per SF	=	6.75 bricks/SF	Brick waste factor	=	5%
Length of Building	=	300 feet	Width of Building	=	200 feet
Height of Building	=	12 feet	Total area of wall openings	=	650 SF
Mortar required per 100 SF	=	7.2 CF/CSF	Mortar waste factor	=	40%
Productivity Rates Mason	=	12.0 Mason-hours/1000 brick	Wage Rates Mason	=	$28.00/hr
Productivity Rates Labor	=	13.0 Laborer-hours/1000 brick	Wage Rates Labor	=	$22.00/hr
Material cost – brick	=	$615/M	Material cost – Mortar	=	$140/CY

Note – CSF stands for 100 Square feet

M Stand for 1000 numbers

Step 1: Calculation of total contact area of wall

Area of long walls = 2 x 300 x 12 = 7200 SF

Area of short walls = 2 x 200 x 12 = 4800 SF

Less openings = 650 SF

Total area = 7200 + 4800 – 650 = 11350 SF

Step 2: Calculation of Required quantity of bricks

Total Area = 11350 SF

Bricks per SF = 6.75

Brick Quantity = 11350 x 1.125 = 76612.50

Add Waste @ 5% of 76612.50 = 3830.63

Total Quantity of bricks required = 76612.50 + 3830.63 = 80,443.13 say 80,443 bricks

Step 3: Calculation of Required quantity of Mortar:

Total Area = 11350 SF

Mortar per CSF (1 CSF=100SF) = 7.2 CF

Mortar Quantity = 11350 x 7.2/100 = 817.20

Add Waste @ 40% of 817.20 = 326.88

Total Quantity of Mortar required = 817.20 + 326.88 = 1144.08 cubic feet

Since 1 CY = 27 CF

Total quantity of mortar required in CY = 1144.08/27 = 42.37 cubic yards

Step 4: Calculation of Required man-hours of mason:

Productivity Rates Mason = 12.0 Mason-hours/1000 Bricks

Total bricks to be installed = 76612.50

Required Mason Hours = 76612.50 x 12/1000 = 919.35 Hours

Step 5: Calculation of Required man-hours of labor:

Productivity Rates Labor = 13.0 Laborer-hours/1000 Bricks

Total bricks to be installed = 76612.50

Required Labor Hours = 76612.50 x 13/1000 = 995.96 Hours

Step 6: Cost Estimate of Wall:

Cost estimate prepared in below table:

Sl. No.	Particulars	Unit Cost	Quantity	Unit	Amount
1	Bricks	$0.615	80,443.00	Each	$49,472.45
2	Mortar	$140.00	42.37	CY	$5,931.80
3	Mason	$28.00	919.35	hours	$25,741.80
4	Labor	$22.00	995.96	hours	$21,911.12
	Total cost for the job				$ 103,057.17

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