Unit Weight of Building Material: Dead Load of Material As per IS 875-(Part -1) – 1987

Hello friends, In this blog post I am going to explain the important unit weight/ Dead Load of different material that is used in buildings. First I would like to explain what dead load is.

Dead Load of as structure means the self-weight of the structure. The dead loads i.e. weight of the load-bearing wall, Flooring Materials, roofing materials, the weight of wall partitions, etc. Loads due Brick wall shall be calculated on the basis of its length, width, thickness, and density of materials. Load due to flooring materials shall find out on the basis of thickness and unit weight of flooring materials. The Unit weight of material used to estimate dead loads shall be used as per IS 875 (Part -1) – 1987. Here is some unit weight of building materials used in building construction.

Unit weight of Building Materials

Coarse Aggregate

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Dry, well -shaken15.7 to 18.351600 to 1870 Kg/m3
2Perfectly weight18.85 to 21.951920 to 2240
3Shingles, 3 to 38 mm14.351460

Fine Aggregate (Sand)

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Dry, clean15.10 to 15.71540 to 1600
2River18.051840
3Wet17.25 to 19.61760 to 2000

Aggregate (Organic)

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Saw dust, loose1.55160
2Peat – Dry5.5 to 6.3560 to 640
3Peat – Sandy, compact7.85800
4Peat: Wet, compact13.351360

Bricks

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Common burnt clay bricks15.7 to 18.851600 to 1920
2Engineering bricks21.22160
3Heavy duty bricks24.52500
4Pressed bricks17.25 to 18.051760 to 1840
5sand cement bricks18.051840
6Sand Lime Bricks20.42080
7Brick Dust (Surkhi)9.91.10

Stone Masonry

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Cast22.552300
2Dry rubble20.42080
3Granite ashlar25.92640
4Granite rubble23.552400
5Lime stone ashlar25.12560
6Marble dressed26.52700
7Sand stone222240

Stone

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Aggregate15.7 to 18.851600 to 1920
2Basalt27.95 to 29.052850 to 2960
3Cast21.952240
4Chalk21.52190
5Granite25.9 to 27.452640 to 2800
6Gravel (loose)15.71600
7Dry Gravel18.851920
8Gypsum21.95 to 23.552240 to 2400
9Lime stone23.55 to 25.92400 to 2640
10Marble26.72720
11Sand stone21.95 to 23.542240 to 2400
12Slate27.452800

Cement

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Ordinary Portland Cement14.101440
2Aluminous14.101440
3Rapid-hardening12.551280

Plain Cement Concrete (Aerated)

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Aerated7.45760
2No-fines, with heavy aggregate15.7 to 18.81600 to 1920
3No-fines, with light aggregate8.65 to 12.55880 to 1280
4With burnt clay aggregate17.25 to 21.21760 to 2160
5With expanded clay aggregate9.4 to 16.5960 to 1680
6With Clinker aggregate12.55 to 17.251280 to 1760
7With Sand and gravel or crushed natural stone aggregate22 to 23.52240 to 2400
8With saw dust6.3 to 16.5640 to 1680
9With foamed slag aggregate9.4 to 18.08960 to 1840

Prestressed Cement Concrete

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Cement concrete, Prestressed23.52400

Reinforced Cement Concrete (RCC)

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1With sand and gravel or crushed natural stone aggregate  
 With 1% Steel22.75 to 24.22310 to 2470
 With 2% Steel23.25 to 24.82370 to 2530
 With 5% Steel24.8 to 26.52530 to 2700

Plaster and Mortar

S. No.MaterialsWeight of Materials (KN/m2)Weight of Materials (Kg/m2)
1Cement Mortar20.42080
2Cement Plaster20.42080
3Gypsum Mortar11.751200
4Acoustic (10 mm)0.0788
5Gypsum Plaster (10 mm)0.18619

Glass (IS: 2835-1977)

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Sheet (2 mm)0.0495
22.5 mm0.0626.3
33 mm0.0747.5
44 mm0.09810
55 mm0.12312.5
65.5 mm0.13413.7
76.5 mm0.16717

Iron

S. No.MaterialsWeight of Materials (KN/m3)Weight of Materials (Kg/m3)
1Gypsum powder13.89 to 17.251410 to 1760
2Pig Iron70.67200
3Gray, cast Iron68.95 to 69.97030 to 7130
4White, cast74.3 to 75.77580 to 7720
5Wrought Iron75.57700

Here I have represented some unit weight of building material. For more please go through this Code IS 875 (Part-1)-1987.

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