When is it necessary to shore an excavation?

Shoring is a critical safety measure used to prevent collapses during excavations. It becomes necessary particularly when an excavation exceeds 1.5 metres in depth. The reason for this requirement is rooted in safety standards that recognize deeper excavations pose a significantly greater risk of soil collapse, which can seriously endanger workers' lives. At depths greater than 1.5 metres, the potential for soil pressure and instability increases, making it essential to implement structural support through shoring techniques to ensure the excavation remains safe for personnel to work.

In contrast, excavations that are less than 1.5 metres deep may not require shoring, as the likelihood of collapse is generally lower and manageable through other means like benching or sloping. While the condition of soil—such as being soft—can influence excavation safety, the specific requirement regarding depth takes precedence in regulations governing excavation practices. Therefore, understanding the depth thresholds is crucial for compliance with safety regulations and for protecting workers on-site.