Four workers sustained minor injuries
EllisDon Forming Ltd. and two supervisors have been fined a total of $130,000 after two separate composite floor collapses on London construction projects sent workers falling to lower levels and left four with minor injuries.
The penalties were imposed on EllisDon Forming Ltd., Corey Jones and Matthew Thompson on January 22, 2026, in the Ontario Provincial Offences Court in London, following a guilty plea, according to the Ontario Ministry of Labour, Immigration, Training and Skills Development. Justice of the Peace Kristine M. Diaz issued the fines, and the court also imposed a 25 per cent victim fine surcharge under the Provincial Offences Act, credited to a provincial fund for victims of crime.
The Ontario government said EllisDon Forming, as employer, failed to ensure that “the measures and procedures prescribed by section 31(1)(b) of Ontario Regulation 213/91 were carried out, contrary to section 25(1)(c) of the Occupational Health and Safety Act.” Supervisors Jones and Thompson were found to have contravened section 27(1)(a) of the Act.
First roof collapse: cross-bracing not installed
Both incidents involved installation of CANAM Hambro D500 composite floor systems at two London project sites: 3080 Bostwick Road and 131 King Street.
The first collapse occurred on July 22, 2022, on a penthouse rooftop overseen by Jones. The Ontario government reported that “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 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.
Second incident: 4 workers injured in 26th-floor collapse
The second incident took place on January 5, 2023, on the 26th floor of a residential apartment building supervised by Thompson. Workers had completed the concrete walls on the 25th floor and installed the composite floor system above.
That morning, the supervisor and other company staff carried out a pre‑pour inspection and, once it was completed, workers began pouring concrete. The ministry stated that “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.
According to the Ontario government, EllisDon Forming “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.” It added that Jones and Thompson “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 led CANAM Hambro to introduce changes to its D500 system and components, including “further design details,” which were implemented at both projects, the ministry said.
Section 31(1)(b) of Ontario Regulation 213/91 (Construction Projects) states that “every part of a project, including a temporary structure shall be adequately braced to prevent any movement that may affect its stability or cause its failure or collapse.”
Meanwhile, Section 25(1)(c) of the Occupational Health and Safety Act (OHSA) states that an employer shall ensure that the measures and procedures prescribed are carried out in the workplace.
Section 27(1)(a) of the Act states that a supervisor shall ensure that a worker “works in the manner and with the protective devices, measures and procedures required by this Act and the regulations”.
