EllisDon Forming Ltd. and two supervisors have been fined a total of $130,000 after two workplace incidents.

The incidents occurred on projects in London, Ontario in July 2022 and January 2023. EllisDon Forming Ltd. had been contracted to install CANAM Hambro D500 composite floor systems at both projects.

At the first project on July 22, 2022, Corey Jones, a supervisor employed by the company, was overseeing work on a penthouse rooftop.

The roof had a unique layout that required a cross‑bracing detail that was not needed anywhere else on the project. This requirement was not clear to the supervisor on the design drawings, which resulted in the cross-bracing not being installed.

While the workers were pouring concrete on the final section of the penthouse roof, the system started to move and then collapsed, causing the workers to fall to the level below. No workers were injured in this incident.

At the second project on January 5, 2023, Matthew Thompson, a supervisor also employed by the company, was overseeing work on the upper floors of a residential apartment building.

The workers had completed the concrete walls on the 25th floor and installed the composite floor system on the 26th floor.

That morning, the supervisor and other company staff carried out a pre‑pour inspection. Once the inspection was completed, workers began pouring concrete.

After most of the floor was poured, workers began leveling and finishing it. Before workers returned to pour the remaining section, part of the composite floor system collapsed causing the workers on the 26th floor to fall to the level below. Four workers suffered minor injuries in this incident.

EllisDon Forming Ltd. was found to have failed to ensure that every part of a project, including a temporary structure, was adequately braced to prevent any movement that may affect its stability or cause its failure or collapse.

Meanwhile, Jones and Thompson were found to have failed, as supervisors, to ensure workers worked in the manner and with the protective devices, measures and procedures required by section 89(2) of Ontario Regulation 213/91.

A post-incident investigation by EllisDon Forming Ltd. resulted in changes by CANAM Hambro to its D500 system and components, including further design details, which were implemented at both projects.