# Thumb Rules for house construction 2024

### 1. **Thumb Rule for Concrete Volume**

The volume of concrete required = 0.038 m3/square feet area

Example:- If Plan Area = 40 x 20 = 800 Sq. m.

So, for the plan area of 800 Sq. m. the area the total volume ofÂ concreteÂ required.

= **800 x 0.038m3 = 30.4m3**

### 2. **Thumb Rule for Steel Quantity for Slab, Beams, Footings & C**olumns

Following are some important thumb rules forÂ steel calculationÂ for slab, beam, column, and footings.

Steel required in residential buildings = 4.5 Kgs â€“ 4.75 Kgs / sq. Ft.

Steel required For Commercial buildings = 5.0 Kgs-5.50 Kgs/Sq. Ft.

### 3. **Percentage of Steel in Structural Members**

Following are thumb rules forÂ reinforcement in concreteÂ members,

1)Â SlabÂ â€“ 1% of the total volume of concrete (Slab steel calculation thumb rule)

2)Â BeamÂ â€“ 2% of the total volume of concrete

3)Â ColumnÂ â€“ 2.5% of total volume of concrete

4)Â FootingsÂ â€“ 0.8% of the total volume of concrete

Example:

How to calculate theÂ steel quantityÂ of slab having the Length, width, and depth of the slab is 5m x 4m x 0.15m

**Step 1: Calculate the Volume of Concrete:**

The Total Volume of Concrete for the given Slab = 5 x 4 x 0.15

= 3m^{3}

**Step 2: Calculate The Steel Quantity Using the Formula:**

As per the guidelines given in the BN Dutta reference book the steel quantity of the slab is 1% of the total volume of concrete utilized.

A thumb rule to estimate the Steel quantity of the above slab = Volume of Concrete x Density of Steel x % of Steel of the Member

Steel weight required for above slab = 3 x 7850 x 0.01 = 235Kgs

**4. Thumb Rules For Shuttering Work**

ShutteringÂ costs are taken as 15-18% of the total construction of the building. Shuttering work is done to bring the concrete into Shape. The Thumb rule to estimate the shuttering required is 6 times the quantity of concrete or 2.4 times theÂ Plinth area.

For example, if the concrete quantity is 0.5m^{3}, then

Area of Shuttering is 0.5 x 6 = 3m^{2}

Components of Shuttering

Shuttering Ply Quantity estimation

The Shuttering plate Ply, Battens, and Nails are components of Shuttering.

Suppose, The Shuttering Ply has a length, width & depth of 2.44 x 1.22 x 0.012

The** **No. of Shuttering Ply Sheets = 0.22 times of Shuttering

Suppose, the Shuttering Area = 3m

Then Ply required for shuttering = 0.22 x 3 = 0.66m^{2}

### 5. **Battens Quantity Calculation**

Shuttering Batten usually has a length & width of 75mm x 40mm.

Batten Quantity = 19.82 x No. of Ply Sheets

If work requires 25 Ply sheets, the total quantity of Battens is 19.82 x 25 = 495 Battens

Nails & Binding Wire Quantity in Shuttering:

Approximately, 75 grams of Nails were used in the shuttering of the 1m^{2} area.

75gms of** **Binding wire is used for every 1m^{2} of Shuttering.

**The thumb rule for Shuttering oil estimation :**

Shuttering oil is applied on the shuttering plate surface used to de-frame or de-assemble from the concrete easily.

Total required Shuttering oil = 0.065 x Total Area of Shuttering

(or)

For every 15m^{2} of shuttering 1 liter of shuttering oil is consumed.

Example :

If, total area of shuttering is 15 m2, then Shuttering oil Consumption = 0.065 x 15 = 0.975.

**6. Thumb Rule for Cement, Sand, Coarse Aggregate Quantity Calculations**

Note: 1 bag of cement = 50Kgs

Thumb rule for Cement required in Brickwork, Cement Masonry &Â PlasteringÂ work in construction

**7. Thumb Rules For Civil Engineers for Brickwork**

The following are Thumb Rules for civil engineering for brickwork andÂ cement quantityÂ calculations.

Brickwork for 1m^{3} | Cement Qty in m^{3} | Cement Qty in Bags |

230 mm Brickwork | 0.876m^{3} | 25.4 Bags |

115 mm Brickwork | 0.218m^{3} | 6.32 Bags |

**8. Thumb Rules For Cement Masonry Quantity**

Cement Masonry Type & Mix | Cement Qty in Bags | Cement Qty in Kgs |

200mm in Cement Masonry work of Ratio 1:6 | 0.124Bags/m^{2} | 6.2Kgs/m^{2} |

150mm in Cement Masonry work of Ratio 1:6 | 0.093Bags/m^{2} | 4.65Kgs/m^{2} |

200mm in Cement Masonry work of Ratio 1:4 | 0.206Bags/m^{2} | 10.3Kgs/m^{2} |

150mm in Cement Masonry work of Ratio 1:4 | 0.144Bags/m^{2} | 7.2Kgs/m^{2} |

100mm in Cement Masonry work of Ratio 1:4 | 0.103Bags/m^{2} | 5.15Kgs/m^{2} |

**8. Thumb Rules Plastering Quantity**

Type of Plastering | Cement Qty in Bags | Cement Qty in Kgs |

Rough Plastering | 0.09 Bags/m^{2} | 4. 5Kgs/m^{2} |

Internal Wall Plastering | 0.09 Bags/m^{2} | 4.5 Kgs/m^{2} |

Duct Plastering | 0.09 Bags/m^{2} | 4.5 Kgs/m^{2} |

External Wall plastering | 0.175 Bags/m^{2} | 8.75 Kgs/m^{2} |

Stucco Plastering | 0.175 Bags/m^{2} | 8.75 Kgs/m^{2} |

Lathen Plastering | 0.55 Bags/m^{2} | 27.5 Kgs/m^{2} |

### 9. Thumb Rules In Building Construction Cost

The thumb rule for house construction cost is a rough estimation of the total cost of construction based on the built-up area of the house. Typically, thumb rules are quick and easy to use but are not precise and may not take into account specific factors that affect the actual cost of construction.

As an approximate guide, a common thumb rule for house construction cost is between Rs. 1500 to Rs. 2500 per square foot, depending on factors such as the quality of materials used, location, design, and labour costs. This would mean that a 1000 square feet house may cost between Rs. 15 lakhs to Rs. 25 lakhs.

Below is a general thumb rule that can be used to estimate the building materials and work required for a given unit area of construction.

Sr. No. | Material/ Work | Thumb Rule |

1. | Cement (bags) | 0.43 bags / sq ft |

2. | Sand (cu.ft) | 2.5 kg / sq ft |

3. | Aggregate (cu.ft) | 1.20 cu ft / sq ft |

4. | Steel (kg) | 1.34 cu ft / sq ft |

5. | Bricks (Nos.) | 7.3 no / sq ft |

6. | Tiles (Nos.) | 0.7 nos / sq ft |

7. | Colour (Liters) | 0.12 lit / sq ft |

8. | Finishing Works | â‚¹ 470/sq ft |

9. | Electrical Cost | â‚¹ 250 /sq ft |

10. | Plumbing Cost | â‚¹ 150 /sq ft |

11. | Fire Fighting Cost | â‚¹ 45 /sq ft |

12. | Exterior Cost | â‚¹ 94.5 / sq ft |

Thumb Rule according to materials percentages,

Description | Thumb rule (% of Total Cost) |

Cement | 14.4% |

Sand | 12.3% |

Aggregate | 7.4% |

Steel | 20.6% |

Painting material | 5.1% |

Tiles | 8% |

Bricks | 5.4% |

Window | 3% |

Doors | 4.4% |

Plumbing | 7.5% |

Electrical | 6.8% |

Sanitary | 4.1% |

## Thumb Rules For Construction Cost

The cost of construction can vary depending on the quality of materials and workmanship used. Below is an overview of the average construction costs based on the quality of construction. This information can serve as a useful reference point for estimating the costs of a building project.

Sr. No. | Construction based on Quality | Thumb Rule |

1. | Basic Quality Construction | 1000 Rs./Sqft |

2. | Medium Quality Construction | 1300 Rs./Sqft |

3. | High Quality Construction | 1700 Rs./Sqft |

## 1000 Sqft House Average Cost Of Construction Thumb Rule

Sr. No. | Description of Work | 1000 sq ft House Average Cost |

1. | Architectural Cost | Rs. 12,500 Onwards |

2. | Brick wall Construction without RCC | Rs. 700 per sqft |

3. | Brick wall Construction With RCC | Rs. 850 per sqft |

4. | Civil Construction Work | Rs. 1400 per sqft |

5. | Electric and Plumbing Work | Rs. 2400 per sqft |

6. | Raw Material Cost In Construction | Rs. 8 Lakh Onwards |

A common approach to estimating building costs is to use a thumb rule based on the percentage of the total project cost. This method provides a rough estimate of the building cost and is often used as a starting point for budgeting purposes.

Sr. No. | Work | Cost |

1. | Excavation and Filling Earthwork | 0.6% |

2. | Foundation Work | 4.9% |

3. | DPC | 1.2% |

4. | Brick work | 32% |

5. | Roofing | 22% |

6. | Flooring | 5% |

7. | Doors and window | 17% |

8. | Plastering | 9% |

9. | White Washing | 3% |

10. | Miscellaneous | 5.5% |