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# 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 & Columns

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

= 3m3

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 0.5m3, then

Area of Shuttering is 0.5 x 6 = 3m2

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 = 0.66m2

### 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 1m2 area.

75gms of Binding wire is used for every 1m2 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 15m2 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.

### 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.

Thumb Rule according to materials percentages,

## 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.

## 1000 Sqft House Average Cost Of Construction Thumb Rule

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.