CROSS REPORTS Report 968

摘要

This report involves a large residential building project, The building was steel framed and at first-floor level had large span transfer beams that took the load from major columns spanning over a wide opening at ground floor. The transfer beams were arranged in pairs with the design load assumed to be spread evenly between them. Early during occupation, concrete soffit panels that were attached to the bottom flanges of the transfer beams were found to be cracked. Upon investigation, it was discovered that the bottom flanges of the pairs of beams had spread apart by up to 70mm. An analysis was undertaken by the original designer and independently by a third party.