Who has the authority to change or adjust the shoring method of an excavation?

The authority to change or adjust the shoring method of an excavation typically rests with the engineer. This is because the engineer is responsible for ensuring the safety and structural integrity of the excavation and any associated earthwork. Engineers have specialized knowledge and expertise in soil mechanics and structural design, which allows them to make informed decisions about shoring methods based on the specific conditions of the site, the type of soil, and the loads involved.

Adjustments to shoring methods may be required due to changes in site conditions, unexpected findings during excavation, or design modifications. The engineer evaluates these situations and determines the most appropriate and safe shoring solution to prevent collapses or failures.

Other roles, such as the project manager, foreman, and site supervisor, may have input or oversight in operational matters, but the technical authority and responsibility for changing shoring methods ultimately lies with the engineer, who can assess the engineering implications and ensure compliance with safety regulations and standards.