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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.
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.
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.
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Mandatory seismic retrofit construction with quality control problems
Standard seismic retrofit details were used for a building with a non-standard foundation, resulting in inadequate connection of structural shear walls to foundations.
Coliseum failure
This is a legacy case study of the 1978 collapse of the roof of the Hartford Coliseum in Hartford, Connecticut.
Failure to maintain roof drainage during re-roof leads to ponding stability collapse
A roof collapsed while the building’s roofing membrane was being replaced.
Dismantling of tower cranes
The falling of two cranes during dismantling in 2019, one in the US and one in the UK, prompts reflections on crane safety on construction sites.