Types of structures || Load bearing structure || Framed structure|| composite structure

Any building can be classified as a Load bearing structure or framed structure nowadays load bearing structure is almost obsolete 

A) Load bearing structure - 

In load bearing structure walls are structural members and load of slab is carried by the walls and then walls transfer the load to foundation 

Hence, below each wall , a foundation of increasing thikness is provided due to this the load is spread over larger area at the foundation level

Advantage

1.Low cost

Limitations of load bearing structure

1. Limited no. Of storeyes 3 to 4 

2.Not suitable in earthquake prone areas 

3.More thickness of wall so space is wasted

4.Takes more time for construction 

5. Less durable

B)Framed structure- 

A frame made up of columns and Beams carries the weight of slab.The walls are only partition walls. The weight of wall is carried by the beam under it. Wall can not be built anywhere but only on top of beams.

In framed structure load of slab is carried by beams and beams transfer that load to columns and column transfers load to foundation under it and foundation transfers load to subsoil under it. 

Advantages 

1. It can be constructed as multistory building

2.This structure is earthquake resistant. 

3.wall thicknesses is less so save floor space

4.Time of construction is less 

5.More durable

Limitation

1.cost is more

C) Composite structure -

If part of a building has framed structure and part of it has load bearing structure,  then it is called composite structure 

Composite structure is mainly found when extension or modification of existing structure is done.