What are the main components of a cofferdam or support system?

The main components of a cofferdam or support system are sheeting, wales, and cross braces.

Sheeting is utilized to create a barrier that holds back water and soil, which is essential for maintaining a dry work environment in excavation or construction projects conducted below the water table. The sheeting provides lateral support and ensures the stability of the surrounding soil.

Wales are horizontal members that are installed to which the vertical sheets are fastened, providing additional support and helping to distribute the load exerted by the soil and water pressure on the sheeting.

Cross braces serve to provide lateral stability to the structure and help prevent deformation of the sheeting under heavy loads. They are typically installed diagonally and can be adjusted to ensure optimum support and rigidity for the system.

These components work together to create a robust support system that can withstand the forces encountered during construction activities in challenging environments like underwater or adjacent to a body of water.