Unit weight is the weight per unit volume. Unit weight is expressed in KG / L or KG/ or KN/. We know that volume is measured in terms of liters or  and weight in terms of kilos or kN. 

Unit weight, also known as specific weight, is the total weight of a substance in a single unit volume.

The specific weight (y) of a material is also defined as the product of its density (ያ), and the standard gravity (g).


unit weight of building matrerials

As a civil engineer, for problem solving or calculations ,you should always remember the unit weights of different building materials. During an interview, you might be asked about unit weight of any materials and within a second you have to be answerable to be more efficient and representative.In this article, i have mentioned all the building materials with its unit weights in the table below.




S.No.

Building Material

Unit Weight

1

RCC - Reinforced cement  concrete

     25 KN/

2

 PCC - Plain cement concrete  

  24 KN/

3

    Portland Cement

    14 KN/

4

 Cement Mortar

      20 KN/

5

  Dry Sand

 16 KN/

6

   Water

  10 KN/

7

 Wet sand

  11 KN/ to 20 KN/

8

 River Sand

  18.4 KN/

9

  Bitumen

  10.4 KN/

10

  Bricks

 16 to 19.2 KN/

11

  Brick Masonry

19.2 KN/

12

  Cement plaster

  20 KN/

13

  Lime plaster

  17 KN/

14

  Broken Bricks

  14.2 KN/

15

 Dry, Loose Earth

 12 KN/

16

 Dry, Loose Sand

  14.4-17 KN/

17

 Silt

  21 KN/

18

  Igneous rock

  27 KN/

19

 Sedimaentary rock

  26 KN/

20

  Metamorphic rock

 27 KN/

21

 Mud

  16 KN/

22

 Granite

  24.5 KN/

23

  Marble

 26.5 KN/

24

 Aggregate

  17.5 KN/

25

 Lime concrete

  19 KN/

26

  Clay (Dry)

  16 KN/

27

  Clay (Damp)

 17.6 KN/

28

Gravel

  20 KN/

29

  Ballast

 17.2 KN/

30

  Chalk

 22.4 KN/

31

  Willow Timber

  420 Kg/

32

  Teak Timber

  650 Kg/

33

 Sal Timber

  10 KN/

34

  Clinker

 750 Kg/

35

 Copper

  89 KN/

36

  Stainless Steel

  74.5 KN/

37

  Aluminium

  27 KN/

38

  Ice

 910 Kg/

39

Slag

 15 KN/

40

  Asbestos Cement Sheet

  12 to 15.6 Kg/

41

  Glass

 24-27.2 KN/

42

  Charcoal

 530 Kg/

43

 Tin

  72 KN/

44

  Nickel

  8.9 KN/




Lets us think out of box , if you know units weights of any other building material ,Then post in a comment section below. I will really appreciate it .

 














ALSO READ:

Rate Analysis and Measurement of Brickwork
Compaction factor test of concrete
STEEL -Steel quantity per m³
Basic Thumb Rules used in Construction by Civil Engineers
Plastering - cement plaster and calculation of quantities of Cement, Sand & Water required for Plastering
How to Calculate Staircase Dimensions and Slope
How to Check the Quality of Bricks at Construction Site


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