What must be ensured when using shield systems in excavations?

When using shield systems in excavations, it is essential to ensure that they can withstand the designed loads without exceeding specified limits. Shield systems are designed to protect workers from cave-ins and other hazards associated with excavation, and their primary function is to provide a safe working environment by maintaining structural integrity under load.

This involves rigorous calculations and assessments to ensure that they can support the expected weights and forces that they will encounter during excavation work. If a shield system exceeds its designed load limits, it may fail, leading to potential injuries or fatalities. Therefore, adhering to load limits is not just a matter of safety, but it is also a compliance issue with excavation regulations and standards.

Other considerations, such as the proximity of installations to nearby structures and the timing of removal, are important, but the critical focus must always be on the ability of the system to hold the applicable loads safely and effectively. This ensures a secure environment for those working in and around the excavation.