Scaffolding for Shoring

Shoring and scaffolding are the most frequent temporary structures in building construction. In multistory work, the shoring which supports freshly placed concrete is necessarily supported by lower floors which may not yet have attained their full strength, and which may not have been designed to carry loads as great as those imposed during construction. Construction loads may exceed design loads by an appreciable amount. Therefore shoring must be provided for enough floors to develop the needed capacity to support the imposed loads without excessive stress or deflection. Whether permanent shores or reshores are used at the several required lower floor levels depends on job plans for reused of materials as well as the rate of strength gain in the structure. Evalation of scaffolding frames and accessories lay out for use as shoring. 

Reduction in strength depending on load point applied on frame.