Calculation of dead load

structure in architecture

1. DEAD LOAD Let us calculate the dead load on structure To calculate dead load we need volume and density of the structural element

2. Example 1 Calculate the dead load of a R.C.C. beam Size of the beam is 23 X 30 cm. Length of the beam is 5.0mt. Calculate the dead load of beam length 5.0 MT Width .23 MT. Depth .30 MT. Volume .23 X .30 X 5.0 .345 cm3 Density of R.C.C. Beam 2400 kg/cm3 Dead load .345 X 2400 828 kg

3. Example 2 Calculate the dead load of a Steel beam Size of the beam is 30 cm. diameter round pipe 6mm thick Length of the beam is 5.0mt. Calculate the dead load of beam length 5.0 MT Diameter .30 MT. Radius r .15 MT. thickness .006 MT. Area of hollow pipe 3.14 X(.15X .15 -.144 X .144)= .00545 Volume 5.0 X Area .027 cm3 Density of steel Beam 7850 kg/cm3 Dead load .027 X 7850 213 kg length 5.0 MT Diameter .30 MT. Radius r .15 MT. thickness .006 MT. Area of hollow pipe 3.14 X(.15X .15 -.144 X .144)= .00545 Volume 5.0 X Area .027 cm3 Density of steel Beam 7850 kg/cm3 Dead load .027 X 7850 213 kg

4. Example 3 Calculate the dead load of a R.C.C. slab Size of the Slab is 3.0mt by 5.0 mt., Thick ness is 12 cm. Calculate the dead load of slab length 5.0 MT width 3.0 MT. thickness .12 MT. Volume 5.0 X 3.0 X .12 1.8 cm3 Density of R.C.C. slab 2400 kg/cm3 Dead load 1.8 X 2400 4320 kg

5. LIVE LOAD Let us calculate the Live load on structure We have to refer the International building codes for live load Live load is as per the usage of the building.

6. Example 4 Calculate the live load of a R.C.C. slab Size of the Slab is 3.0mt by 5.0 mt., Thickness is 12 cm. Calculate the live load on slab for residential building. length 5.0 MT width 3.0 MT. Area 5.0 X 3.0 15 SMT Live load for residential building 200 kg/ SMT Live load 15 X 200 3000 kg

7. Example 5 Calculate the live load of a R.C.C. slab Size of the Slab is 3.0mt by 5.0 mt., Thickness is 12 cm. Calculate the live load on slab for school building. length 5.0 MT width 3.0 MT. Area 5.0 X 3.0 15 SMT Live load for residential building 300 kg/ SMT Live load 15 X 300 4500 kg

8. Spanning systems of R.C.C. Slab One-way slabs One way slabs are spanning in one direction, Suitable for 1.8 to 5.0 MT. Also suitable for moderate loads One way slabs are supported by concrete beams or load bearing walls In short direction Two–way slabs Two way slabs are spanning in two direction, Suitable for medium spans and heavy loads When we transfer the load of slab it should be transferred in one way slab to adjoining longer side of wall or beam half –half it should be transferred in two way slab on all four sides of wall or beam.