It’s all buried structures underlying a construction.

Building foundations provide stability. They transmit to the ground the total weight of the structure by distributing the order to ensure a perfect fit . There are two main types of foundations by the depth at which they are located :

• Foundations called “superficial ” are used when the ground near the surface has sufficient strength.

• “Deep” Foundations say are used when the soil , which has sufficient strength , is located away from the ground surface.

These two different types of foundation are calling for reinforcement techniques and different casting.