Adequate shoring is critical to the safety of a concrete construction project. Shoring must be able to support concrete and formwork loads until the concrete becomes structurally self-sufficient. But even shoring systems with load-carrying capacities adequate for job conditions can fail if not properly erected on stable sills or other solid support. To help engineers and contractors prevent shoring accidents, the Scaffolding, Shoring and Forming Institute (SSFI) publishes guidelines for proper and safe shoring erection.