Thumb Rule of Construction Material

• Steel =3 to 5 kg/sqft
• Cement =0.5bags/ sqft
• RMC =0.05 m3/sqft
• Block =12.5 nos /sqm
• Electrical cast = Rs 133/sqft
• Plumbing cost = Rs 126/sqft
• Fire fighting cost = Rs 40/sqft
• External development = Rs 94.5/sqft
• Civil works-Structure = RS 751.25/sqft
•  Finishing works = RS 467.50/sqft

Thumb Rule of Cement Constant

• 200 mm in cm 1:6 =0.124Bags /sqm
• 200 mm in cm 1:4 =0.206 bags/sqm
• 150 mm in cm 1:6 =0.093 bags/sqm
• 150mm in cm 1:4 =0.144 bags/sqm
• 100 mm in cm 1:4 =0.103 bags/sqm
• Ceiling plastering =0.11 bags/sqm
• Wall plastering =0.09 bags/sqm
• Rough plastering =0.09 bags/sqm
• Duct plastering =0.09 bags/sqm
• External plastering =0.175 bags/sqm
• Lathen plastering =0.55 bags/sqm
• Stucco plaster =0.175 bags/sqm
• 100 mm plaster band =0.012 bags/rmt
• PCC 1: 4: 8 =3.4 bags/cum
• PCC 1:5:10 =2.52 bags/cum
• PCC 1:3:6 =4.2 bags/cum
• PCC 1:2:4 =6.02 bags/cum
• 230 mm brick =0.876 bags/cum
• 115 mm brickwork =0.218 bags/cum
• VDF 100 mm thick =0.82 bags/sqm
• Granolithic flooring =40 mm 0.35 bags/sqm
• Granolithic flooring =20 mm 0.28 bags/sqm
• Anti-skid =0.28 bags/sqm
• Ceramic =0.28 bags/sqm
• Vertified tile flooring =0.28 bags/sqm
• Vertified tile dado =0.27 bags/sqm
• Ceramic dado =0.27 bags/sqm
• Marble flooring =0.3 bags/sqm
• 100 mm ht marble skerting =0.027 bags/rmt
• Marble glading =0.27 bags/sqm
• Terracota tle flooring =0.3 bags/sqm
• Mangalore tile =0.3 bags/sqm
• Door frame fixing =0.17 bags/sqm
• Water proofing for sunken slab =0.23 bags/sqm
• Waterproofing for walls =0.23 bags/sqm
• Water proofing for balcony/toilets =0.65 bags/sqm
• Anti terminate treatment chemical Name is chlorpyrifos 20 %.38. Diluting 5 Lit of Chemical with 95 Lit of water and usage is 7.5 Sqm Per liter {Diluted}.
• To Provide 1” Dia hole And Deep 1 Foot

Labour Productivity Thumb Rule:- 

1. Brickwork
   • 1 Mason 1 Men mazdoor 1.25 sqm
   • 1 Women Mazdoor
2. Wall Plastering
   • 1 mason
   • 1 Men mazdoor 10 sqm
   • 1 Women Mazdoor
3. Ceiling
   • 1 mason
   • 1 Men mazdoor 8 sqm
   • 1 Women Mazdoor
4. External Plastering
   1. 1 mason
   2. 1 Men mazdoor 8 sqm
   3. 1 Women Mazdoor
5. Blockwork 8”
   • 1 mason
   • 1 Men mazdoor 10 sqm
   • 1 Women Mazdoor
6. Blockwork 6”
   • 1 mason
   • 1 Men mazdoor 8 sqm
   • 1 Women Mazdoor
7. Blockwork 4”
   • 1 mason
   • 1 Men mazdoor 8 sqm
   • 1 Women Mazdoor
8. Carpenter
   • 1 Skilled
   • 1 Un skilled 4 Sqm
9. Bar bender
   • 1 Skilled
   • 1 UN skilled 200Kg
10. Tile work
    • 1 Mason
    • 1M Mazdoor 10 Sqm
11. Paint
    • Painter skilled OBD 600 Sft
    • Emulsion 800 Sft
    • Putty 600 Sft
    • Primer 800 Sft
12. External Painting
    • Ace-Low quality
    • Apex-Medium Quality
    • Apex ultima –High Quality

The Miscellaneous Thumb Rules in Construction:-

• One Sqm = 10.763Sft
• One Cum = 35.314 Cft
• One Acres = 4046.873
• Sqm = 43560.17
• Sft = 4840.019Yards
• One Cubic meter = 1000 liter
• One Meter = 3.280Feet
• One Mile = 1609.344 meter
• One Acre = 100 cent
• One ground = 2400
• Sft = 5.51 cent
• ½ ground = 2.75 cent
• One Mile = 8 Furlong
• One cement bag = 1.25 Cft
• One Forma box = 1*1*1.25 feet

For Adding 4 Liters of Water in 1 Cu.m Freshly Mixed Concrete

1. The slump value will be increased by 25 mm.
2. The compressive strength of concrete will be decreased by 1.5 to 2.0 N/mm2
3. The shrinkage potential will be increased by 10%.
4. 1/4 bag of cement will be wasted.

If the Temperature of Freshly Mixed Concrete Is Increased by 1%, Then

1. 4 liters of water per cu.m will give equal slump.
2. The air content will be decreased by 1%.
3. The compressive strength of concrete will be decreased by 1.0 to 1.5 N/mm2.

If the Air Content of Freshly Mixed Concrete Is

1. Increased by 1% then the compressive strength will be decreased by 5 %.
2. Decreased by 1%, the yield will be decreased by 0.03 cu.m per 1 cu.m.
3. Decreased by 1%, then the slump value will be decreased by about 12.5 mm.
4. Decreased by 1%, then the durability of the concrete will be reduced by 10%.

Rule of Thumb Construction Cost Estimating

Thumb Rule Formula

Steel Column Size Rule of Thumb

What Is a Good Thumb Rule?

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