Civil Engineering

What’s The Thumb Rule And Estimation Of Thumb Rules In Civil Engineering

What Is The Thumb Rule |Estimation Of Thumb Rules In Civil Engineering| Type of Structure In Thumb Rule |Type of Publishing/Plastering In Thumb Rule

What Is The Thumb Rule And Estimation of Thumb Rules In Civil Engineering

This article will discuss the thumb rule definition. estimation of the thumb rule. types of thumb rule in civil engineering. What Is The Thumb Rule And Estimation Of Thumb Rules In Civil Engineering? What Is The Thumb Rule |Estimation Of Thumb Rules In Civil Engineering| Type of Structure Thumb RuleType of Publishing/Plastering In Thumb Rule

What Is the Thumb Rule?

Rule of thumb At first, we’ve to understand the meaning of the thumb rule before jumping into the discussion. Thumb rules are “ Approximate Value ”. Thumb Rules has no unit systems We use the thumb rules for nearly every computation like concrete computation, force estimation, the material demand for trouncing, destruction computation, and brickwork computation. The thumb rule means the approximate value, not 100 percent confirm the value.

Manpower productivity by Thumb Rule

Thumb rules will be useful to calculate the total force needed for your coming schedule.

Manpower Activity 

Wall publishing 120 Sft

Mason – 01

Manly mazdoor –O.75

Womanish Mazdoor –O.5

Brick Work 45 Boxy bases

Mason – O1

Male mazdoor – O1

Womanish Mazdoor –O.5

Ceiling Publishing 90 Forecourt

Mason – O1

Male mazdoor –O.75

womanish Mazdoor –O.5

Shuttering Work 11 Sqm




Steel Work 100 Kg

Bar Bender – 1

Nos coadjutor – 1 No’s

Tile Work 10 Sqm

Tile Mason – 1 No’s

Coadjutor – 1 No’s

Womanish Mazdoor –1.75

Block Work 2 m³

Mason – 2

Manly mazdoor –1.75

Earth Digging 1000 Cft

Manly Coolie – 5

Nos womanish Coolie – 4 No’s

Thumb rule for concrete work

The concrete constituents will vary grounded on the blend rate.

For Example,

If the Plinth area is 100Sq.ft

( 10 x 10) and the needed

concrete volume is 100 x0.04 = 4 m³  with M5 blend rate means

Now from the below table which is for 1 m³

The needed Concrete Constituents for 4 m³ M5

Cement –2.77 x 4 = 11.08 bags

Beach –0.48 x 4 = 1.92 m³

Coarse total = 0.96 x 4 = 3.84 m³

Thumb Rule of Concrete material

The demand Grade rate of Cement in Bags and Sand in m³ Coarse summations in m³

Grade   Ratio     Cement          Sand       Aggregates

M5      1:5:10       2.77               0.48        0.96

M7.5   1:4:8         3.41               0.47        0.95

M10     1:3:6        4.44               0.46        0.92

M15     1:2:4        6.34               0.44        0.88

M20     1:0.5:5      8.06               0.42        0.84

M25     1:1:2         11.09             0.39        0.77

Thumb rule for Plastering Work For trouncing

The material volume will vary grounded on the different blend rates like concrete and the thumb rule for trouncing work Mentioned

Type of Publishing/Plastering    Mix rate      Consistence in mm   Cement Bags Sqm        sand m³/ Sqm

Inner trouncing/Plastering           1.3                   1.5                                   0.16                       0.017

External trouncing/Plastering      1.4                    2.0                                   0.17                       0.024

Rough trouncing/Plastering         1.5                    1.6                                   0.11                       0.020

Ceiling trouncing/Plastering         1.2                    1.2                                   0.17                       0.012

Thumb rule for Brick Work

1-The size of the slip up 190 mm x 90 mm x 90 mm

2-Number of bricks per boxy meter( m3) = 500 No

Mix Ratio and Brick Works Thickness       Mortor thickness (mm)     Cement (Bags)   Sand m³

1:6  200 mmThickness10                   1.4/m³                              0.30

1:5 200 mm Thickness 10                  1.7/ m³                             0.25

1:4 100 mm Thickness 10                   0.15/m²                           0.035

1:5 200 mm Thickness Block 10         0.15/m³                           0.02 

Thumb rule for RCC Structure/Steel

The sword brings veritably preciousness compared to other construction material and the redundant purchase of sword demand impact the design budget. A good developer restrains sword application.

Type of Steel Structure                   Kg/ Sqft

Domestic structure                                                2.5 to4.5

marketable structure                                             4.5 to5.5

Mass Project Tall or heavy Structure                    6 to 8

The Rebar %  against concrete volume at all times based on the structural element and the minimum and maximum % of Rebar used in all construction work as mentioned as per IS standard.

The Thumb rule for Rebar in RCC 

Structural Element % of Rebar  in Concrete
Rebar in the Slab                  O1  Percent
Rebar in the Beam                O1  Percent to 2Percent
Rebar in the Column             2.50Percent

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Raja Numan

Hi, My name is Engr. Raja Numan author of Engineering Information Hub and I am a Civil Engineer by Profession and I've specialized in the field of Quantity Surveying, Land Surveying as QC Engineer in national and multinational companies of Pakistan & Saudi Arabia.

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