Introduction of Rate Analysis of Brick Masonry
Mortar is used a sum different proportions 1:2, 1:4, 1:6, 1:8, etc.(1 cement: 2 Sand). This quantity estimation of bricks is required for the rate analysis.
Important Point in Rate Analysis of Brick Masonry
Measurement of Brick Masonry
In booking dimensions, the order will be consistent and generally at the sequence of length, breadth or width and height or depth or thickness.
Brickwork shall be measured in cubic meters unless otherwise specified.
Any extra work over the specified dimensions will be ignored.
Dimensions will be measured correct to the nearest 0.01 m, i.e., 1 cm. Areas will be calculated to the nearest 0.01 sq meters, and the cubic contents shall be worked out to the nearest 0.01 cubic meters
Brickwork will be measured separately in the following stages:
- From foundation to floor one level (Plinth level)
- Plinth (floor one) level to floor two-level
- Between both specified floor levels above floor two-level
Dednctioan of Brick Masonry
Where a minimum area is defined for deduction of an opening, void, or both, such area shall refer only to opening or void within the space measured.
Where a minimum area is defined for deduction of an opening, void, or both, such areas shall refer only to opening or void within the space measured.
Ends of dissimilar materials (that is, joists, lintels, beams, rafters, posts, girders, purlins, corbels, trusses, steps, etc.); up to 0.1 m2 in section;
Opening up to 0.1 m2 in area
Wallplates, bed plates and bearing of slabs, chajjas and the like, where thickness does not exceed 10 cm and the bearing does not extend over the full thickness of the wall;
Cement concrete blocks as for holdfasts and holding down bolts;
Iron fixtures, such as wall ties, pipes up to 300 mm diameter and holdfasts for doors and windows; and
Chases of section not exceeding 50 c.m. in girth.
I am bearing a portion of the drip course, bearing of molding and cornice.
Also, read: What Is Leveling | Leveling Methods
Dimensions of Brick Masonry
The brick can be modular or non-modular.
Sizes for two types of bricks/tiles shall be as per the below table.
While the use of modular bricks/tiles is recommended, non-modular (FPS) bricks/tiles may also be used where so specified.
Non-modular bricks/tiles of sizes other than these sizes mentioned below table may also be used where specified.
|Type of Bricks/ Tiles||Nominal Size mm||Actual Size mm|
|Modular Bricks||200 x 100 x 100 mm||190 x 90 x 90 mm|
|Modular tile bricks||200 x 100 x 40 mm||190 x 90 x 40 mm|
|Non-modular tile bricks||229 x 114 x 44 mm||225 x 111 x 44 mm|
|Non-modular bricks||229 x 114 x 70 mm||225 x 111 x 70 mm
Dimensions of Brick Masonry
Also, read: Trapezoidal Footing Formula with Calculation
Rate Analysis of Brick Masonry
Example for Rate Analysis of Brick Masonry
|Brickwork with best available local bricks in foundation and plinth in cement mortar 1:3 (1cement : 3 fine sand)|
|Cost for 10.00 Cu.m.|
|Bricks (Size of brick = 190 mm x 90 mm x 90 mm)||5000.00||Day||5.00||25000.00|
|Westage of brick 5% Extra||5%||1250.00|
|Westage of cement 2% Extra||2%||140.80|
|Westage of sand 2% Extra||7%||219.28|
|C||Scaffolding 1% Extra||1%||365.63|
|D||Transportation Cost 1%||1%||365.63|
|E||Other Charges 2 % Extra||2%||731.27|
|F||Add for Water Charge @ 1% on Items Marked||1%||365.63|
|G||Add for Contractor’s Profit @15% on Items Marked||15%||5484.51|
|Cost of 10.00 Cu.m.||52995.36|
|Cost of Cu.m.||5299.54|
|Round off Cu.m.||5300.00|
Calculation of Brick for Rate Analysis of Brick Masonry
Size of actual brick dimensions of 190 mm x 90 mm x 90 mm
The volume of 1 brick with mortar = 200 x 100 x 100 ( 10 mm mortar thickness on all sides)
= 0.2 m x 0.1 m x 0.1 m
The volume of a brick with mortar = 0.002 Cum (m3)
Therefore, Number of bricks required for 1 Cum (m3) = 1/0.002 = 500 Nos.
Requirement of brick 10 cu.m. = 500 nos (1 cu.m = 500 nos. of brick) x 10 cu.m
So, 10 cu.m. brick work requirement of brick = 5000 nos. of brick requirement
Also, read: What Is EDM in Surveying | Type | Errors
Cement and Sand Calculation
Calculation of Cement
The volume of bricks without mortar
Volume of 1 brick without mortar = 190 mm x 90 mm x 90 mm
- = 0.19 m x 0.09 m x 0.09 m
The volume of 1 brick without mortar = 0.001539 Cu.m. (m3)
The volume of 500 bricks without mortar = 500 nos. X 0.001539 Cu.m. (m3)
The volume of bricks without mortar for 1 cum = 0.7695 Cu.m. (m3)
So, The required amount of cement mortar = 1 Cum – Volume of bricks without mortar
- Cement Mortar = 1 Cu.m. (m3) – 0.7695 Cu.m. (m3)
Required amount of cement mortar Required amount of cement mortar = 0.2305 Cu.m.(m3) (Wet Condition) = 0.2305 Cu.m. (m3)
Convert Dry volume of a mortar = 0.2305 Cu.m. x 1.33 = 0.306565 Cu.m.
Cement mortar ratio is 1:3 (1 cement : 3 fine sand)
The required amount of Cement quantity at brickwork = 0.306565 Cu.m. x (1/(1+3))
- = 0.306 x 0.25
- = 0.07664125 cu.m. cement requirement
- Cement in k.g. = volume x density cement
- Cement in k.g. = 0.07664125 cu.m. x 1440 (1440 kg/m Density of cement for 50 k.g)
- = 0.07664125 x 1440 = 110. 363 kg of cement of bag requied ment of cement in k.g.
- = 110.363 / 50 (one cemnent bag weight 50 k.g. only) = 2.20 bag
- So, 10 cu.m. brick work requirement of cement = 2.20 bag x 10 cu.m. = 22 bag
Calculation of Sand
Required amount of Sand = 0.306565 x 3/(1+3)
- =0.2299 Cu.m. requierd of sand for 1 Cu.m.
- So, 10 cu.m. brickwork requirement of sand = 0.2299 Cu.m x 10 cu.m. = 2.299 cu.m.
Also, read: What Is Transit Theodolite | Theodolite Parts
Calculation of Brick Masonry for Labour
As per calculation of rate analysis in labor consumption per Cu.m. requirement as per our experience or CPWD book, this book public by Central Public Works Department, Government of India for easy calculation of the rate analysis, etc.
As CPWD Mate per cu.m. 0.4 of day Mate & Mason, Halper per cu.m. 0.8 of day, Coolie for water curing per cu.m. 0.4 of day
Waste in Brick Masonry
All measurements of cuttings shall unless otherwise stated, be deemed to include consequent waste.
Like brick masonry, 5%, Cement 2%, and Sand 7% wastage as per IS code allowance
Extra Work Calculation in Rate Analysis of Brick Masonry
Extra Changes in rate analysis as per below
Scaffolding 1% Extra
Transportation Cost 1%
Other Charges 2 % Extra (Electrical, and site extra expense)
Add for Water Charge @ 1% on Items Marked
Add for Contractor’s Profit @15% on Items Marked