There are endless thumb rule used in
Construction Industry , I am stating few of them listed below : -
Concrete : 0.038 cum per sq. ft. of plan
area. (+/- 5%)
Steel : 4.50 to 5.00 Kg per sq. ft.
Shuttering : 2.40 to 2.50 times the plan
area of slab (this includes col./beams/sides etc)
Brick Work : 0.015 cum per sq. ft. of plan
area.
Approximately 0.25 cubic metres of mortar
and 500 bricks are required for 1 cubic metre of brickwork
Concrete: 0.5A Cum for Commercial Bldg.
0.2A Cum for Residential Bldg.
Where, A= Total Built Up Area.(i.e. Plinth
Area xNo. of Floor)
Steel: 4.5-4.75 kg per Sqft of Built up
Area for Residential Building
5.0-5.5 kg per Sqft of Built up area for
Commercial Building.
Formwork: (1). Shuttering = 6 times the
quantity of concreting.(or2.4 times the plinth area)
(a) No of12 mm Ply (2.44mx1.22m)=0.22 times
of shuttering ( or, 0.4A)
(b)Batten(75mmx40mm)=19.82X No. of Ply
Sheets(it gives batten in RM)
(c)Nails=0.22x total area of
shuttering.(unit-kg) Practically, 75 gm nails and 75 gm binding wire +
nut-bolts are consumed per sqm of shuttering
(d)Shuttering Oil=0.065x total area of
shuttering(unit-Lt)
Electrical cost = Rs 133/sft
Plumbing cost = Rs 126/sft
Fire fighting cost = Rs 40/sft
External development = Rs 94.5/sft
Brick Work - 1 mason + 1Labour = 1.25 cm
Wall Plastering - 1 mason +1 Labour = 10
Sqm
Ceiling Plastering - 1 mason + 1Labour = 8
Sqm
External Plastering - 1 mason + 1 Labour =
8 Sqm
Carpenter - 1 Skilled + 1 Un skilled = 4
Sqm
Bar bender - 1 Skilled + 1 Un skilled = 200
Kg
Tile work - 1 Mason + 1Labour = 10 Sqm
Painter - Skilled -OBD 600 Sft
Emulsion 800 Sft
CO-EFFICIENT FOR PAINTING:
Partly panelled and glazed doors = 0.80
times the door or window area.
Collapsible gates = 1.50
Corrugated sheeted steel doors = 1.25
Rolling shutters = 1.10
Expanded metal hard drawn steel = 1.00
Fencing and gates, brace, rails = 1.00
Flush doors = 1.20
Partly panelled doors = 1.00
Fully glazed doors = 0.80
Fully louvered = 1.80
If
its only for slab ,then a 5″ slab almost costs roughly Rs.220/- per sq. Feet
all inclusive of Steel, Rcc, Shuttering etc.
If u are asking for residential building
complete in all respects…than it costs u around Rs. 1200/- per sq. Feet. Civil
Structure Work – Rs. 750 per sqft and for Finishing Work – Rs. 450 per sqft.
(a) Painting - Rs 12 - 17 per sqft (two layers
of putty + two layers of coat) including taxes
(b) Flooring - Marble is Rs 80 per sqft
(depends on the type of marble may be - but this is what it is costing us).
Granite and bathroom tiles 15 - 20 Rs per sqft (we provide all material such as
cement, sand etc).
(c) Electrical - You are better off buying
the materials for them. A rough guide is Rs 50 - 100 per sqft for materials and
Rs 12 - 20 per sqft for labor.
CEMENT REQUIREMENTS:
M10 : 210 Kg
M20 : 320 Kg
M25 : 340 Kg
M30 : 380 Kg
M35 : 410 Kg
M40 : 430 Kg
M45 : 450 Kg
Manpower Activity Output – 8
Hours
1 Mason – 1
Male mazdoor –
0.75
Female Mazdoor –
0.5
(Brick
Work 45 CFT)
2 Mason – 1
Male mazdoor – 1
Female Mazdoor –
0.5 Wall plastering 120 Sft
3
Mason – 1
Male mazdoor – 0.75
Female Mazdoor – 0.5
(Ceiling Plastering 90 Sft)
4 Carpenter-2.25
Foreman- 0.2
Helper- 2.25 (Shuttering Work 11 Sqm )
5 Bar
Bender – 1 Nos
Helper – 1 Nos Steel Work 100 Kg
6 Tile
Mason – 1 Nos
Helper – 1 Nos Tile Work 10 Sqm
7 Mason
– 2
Male mazdoor – 1.75
Female Mazdoor – 1.75 Block Work 2 Cum
8 Male
Coolie – 5 Nos
The concrete ingredients will be vary based
on the mix ratio,
For Example,
If the Plinth area is 100 Sq.ft (10 x 10)
and the required concrete volume is 100 x 0.04 = 4 Cum with M5 mix ratio means
Now from the below table which is for 1 m3
Required Concrete ingredients for 4 m3 of
M5 is
Cement – 2.77 x 4 = 11.08 bags
Coarse aggregate = 0.96 x 4 = 3.84
cum
Thumb Rule of Concrete material requirement
Grade Ratio Cement in Bags Sand in Cum Coarse
Aggregates in Cum
M5 01:05:10 2.77 0.48 0.96
M7.5 01:04:08 3.41 0.047 0.95
M10 01:03:06 4.44 0.46 0.92
M15 01:02:04 6.34 0.44 0.88
M20 01:05.5
8.06 0.42
0.84
M25 01:01:02 11.09 0.39 0.77
Thumb rule for Plastering Work
For plastering, the material quantity will
vary based on the different mix ratio like concrete and the thumb rule for
plastering work has listed below.
Type of Plastering Mix ratio Thickness
in mm Cement Bags/Sqm Sand Cum/Sqm
Inner Plastering 1:3 15 0.16 0.017
External Plastering 1:4 20 0.17 0.024
Rough Plastering 1:5 16 0.11 0.020
Ceiling Plastering 1:2 12 0.17
The size of brick 190mm x 90mm x 90mm
Number of bricks per cum = 500 Nos
Must
read: How to calculate the number of bricks
|
Mix Ratio and brickwork thickness |
Mortar
Thickness in mm |
Cement in
Bags |
Sand in Cum |
|
1:6 200mm Thk |
10 |
1.4 / Cum |
0.3 |
|
1:5 200mm Thk |
10 |
1.7 / Cum |
0.25 |
|
1:4 100mm Thk |
10 |
0.15
/ Sqm |
0.035 |
|
1:5 200mm Thk Block 10 0.15
/ Cum |
0.02 |
|
|
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