TYPES OF JOINTS IN A STRUCTURE

TYPES  OF JOINTS IN A STRUCTURE

In any type of structure, consideration is given towards structural damages. These damages can be either sudden or over the course of time. Either way, it is to be ensured that the damage is minimized by any means. For all these dimensional changes, the structure is broken down into different components which when joined together form a joint.

Different types of joints are provided in a structure:

• Expansion Joint: This type of joint is provided, keeping in mind of the thermal expansion property of concrete. With an increase in temperature, concrete can expand  which in turn can form cracks. To avoid the formation of cracks, expansion joint is provided which allows for free movement of concrete.

• Contraction Joint: This type of joint is inverse in comparison to the expansion joint. Aim is the same as expansion joint ( to prevent the formation of cracks ) the only difference being that this is provided for the case where the temperature drops.

• Sliding Joint: As the name suggests, this joint is provided to allow free movement between two components of a structure. This joint is usually provided under the foundation keeping in mind the horizontal forces ( shear stress ) applied by the subsoil on concrete. 

• Isolation Joint: This joint serves the purpose of isolating one structural component from the other. This joint is usually made from asphalt-impregnated fiberboard, cork, rubber or neoprene.