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Failures of cold formed steel floor systems during construction
This report describes numerous collapses during construction of cold formed steel floor systems caused by lack of bracing/fastening and overloading of an incomplete structure.
Steel column erection anchoring connection failure injured worker
This report describes how a construction worker was injured during the erection of a steel column due to shortcomings in erection procedures and inadequacies in a column base connection.
Inappropriate material storage causes collapse of ceiling of a truck dock mezzanine
This report describes the collapse of an overloaded framed ceiling.
Channel slab roof deck collapse during reroofing
This report highlights the structural risk caused by machinery during reroof a project.
Roof collapse of warehouse structure under rainwater ponding
This report highlights the structural risk caused by rainwater ponding on relatively flat roofs.
Failure of existing long-span wood roof truss following installation of new roof-top HVAC units
Failure of an existing long-span wood roof truss following installation of new roof-top Heating, Ventilating, and Air Conditioning (HVAC) units offers lessons in the special challenges of renovations to existing buildings.
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Structural engineer faces ethical challenge
A structural engineer performing a delegated design faced an ethical dilemma when discovering what is believed to be errors in the base structural design performed by others.
Bottom-chord bracing for metal plate-connected wood trusses used in light-commercial applications
Concerns regarding metal plate-connected wood trusses in light-commercial construction when subject to net uplift.
Inadequate design and quality assurance on a mandatory seismic retrofit project
A tenant's structural engineer discovers widespread design and related quality problems on a mandatory seismic retrofit project.
Under slab perimeter drain failure
Local homeowners installed perimeter drains and sump pumps after high water tables caused water leakage into their basements.