Constuction Thumb rule

Thumb rules play a most Important role while taking quick decisions on site.

Thumb rule is an approximate & comparing method. In thumb rules, the units are not the same . when we compare to get the results. So never consider units while performing thumb rule.

Labour Productivity thumb rule :-

AAC Block work 8inch :- 10 sqm

1 mason ,1 Men majdoor ,1 Women Majdoor

ACC Block work 4 and 6 inch:- 8 sqm

1 mason , 1 Men majdoor ,1 Women Majdoor

Brick work 1.25 sqm

1 mason , 1 Men majdoor , women Majdoor

Wall Plastering 10 sqm

1 Mason , 1 men majdoor , 1 Women Majdoor

External & Ceiling Plastering 8 sqm

1 mason , 1 Men majdoor,1 Women majdoor

Carpenter 4.5 Sqm

1 Skilled 1 Unskilled

Bar bender 250Kg

1 Skilled 1 Unskilled

Tile work 10 Sqm

1 Mason1 1 Majdoor

Painting 700 Sft

Painter skilled

Emulsion 900 Sft

Putty 600 Sft

Primer 800 Sft

House Construction Thumb Rule

Concrete : 0.04 cum per sq. ft. of plan area.

Steel : 3.50 to 4.00 Kg per sq. ft.

Shuttering : 2.40 to 2.50 times the plan area of slab (This include all structure

Formwork:

Shuttering = 6 times the quantity of concreting.(or2.4 times the plinth area)

1. Number of 12 mm Plywood (2.44m x1.22 m) = 0.22 times of shuttering

2.Batten ( running meter ) (75mm x 40mm) = 19.82 X number of Ply Sheet

3. Shuttering Oil = 0.065 x total area of shuttering in litre

4. Nails = 0.22 x total area of shuttering in kg

5.Binding wire = 75 gm per sqm

Brick Work : 0.016 cum per sq. ft. of plan area.

Anti terminate treatment Thumb rule

1. Anti terminate treatment chemical Name is chloropyrifoc 20% . Diluting 5 Litre of Chemical with 95 Litre of water and usage is 7.5 Sqm Per liter

Flooring Thumb rule

1. Marble flooring = 0.3 bags/sqm
2. Marble skirting = 0.025 bags/rmt
3. Marble glading =0.27 bags/sqm
4. Terraace flooring =0.3 bags/sqm
5. Mangalore tile =0.35 bags/sqm
6. Granolithic flooring =40 mm 0.3 bags/sqm
7. Granolithic flooring =20 mm 0.25 bags/sqm
   
   

Water Proofing

1. water proofing for sunk slab = 0.25 bags/sqm
2. water proofing for walls = 0.25 bags/ sqm
3. water proofing for toilets = 0.63 bags/sqm
4. ceramic =0.3 bags/sqm
5. vertified tile flooring =0.28 bags/sqm
6. vertified tile dado & ceramic dado =0.25 bags/sqm
   
   

Steel Quantity Thumb rule

Structural Member	Percentage of Steel
Slab 125 mm	.8 to 1% of total volume of concrete
Beam	2 to 2.5% of of total volume of concrete
Column	2.5 to 3% of total volume of concrete
Footings	0.8% to 1 of total volume of concrete

Mix Design Thumbrule

Concrete Mix	Cement Quantity	Coarse Aggregate	Fine Aggregate
M5 (1:5:10)	2.82 Bags	0.98m3	0.49m3
M7.5 (1:4:8)	2.45Bags	0.97m3	0.48m3
M10 1:3:6)	4.50 Bags	0.90m3	0.45m3
M15 (1:2:4)	6.5 Bags	0.88m3	0.44m3
M20 (1:1.5:3)	7.5 Bags	0.84m3	0.42m3

Thumb Rules for Brickwork:

Brickwork for 1m3	Cement Qty in m3	Cement Qty in Bags
9`Brick wall	0.875m3	26.1 Bags
5` Brick wall	0.218m3	6.32 Bags