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 (á‹«), and the standard gravity (g).

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 .

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