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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.
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.
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.
Under slab perimeter drain failure
Local homeowners installed perimeter drains and sump pumps after high water tables caused water leakage into their basements.
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.
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The use of stand-off brackets for C-shaped cornice hooks for scaffolding support
A correspondent reports that using stand-off brackets with C-shaped cornice hooks for supporting suspended scaffolding have been contributing factors in safety incidents in certain circumstances.
Coliseum failure
This is a legacy case study of the 1978 collapse of the roof of the Hartford Coliseum in Hartford, Connecticut.
Rigid wall flexible diaphragm roof collapse in earthquake
Part of the roof of a one-story building in California collapsed during a 2019 earthquake.
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.