What time do most construction worker injuries happen?
- Mar 9
- 2 min read
March 9, 2026
Chicago — More construction workplace injuries occur around 9 a.m. than at any other time of the day, according to an analysis conducted by construction safety software provider HammerTech.
That insight, gained from a review of more than 75,000 construction incidents that occurred from 2018 to 2024, was published in Hammertech’s Safety at Scale 2025: Construction Insights from the Field report.
“It’s not an overwhelming spike,” the report states about the 9 a.m. statistic, “but it’s consistent enough to warrant attention. This timing generally sits just after site start-up, when crews are mobilized, work has ramped up and early planning is giving way to physical tasks. In many regions, it also coincides with the first scheduled break.
“The data doesn’t tell us why, but could prompt practical questions: If risk is predictably higher at this point, could teams adjust supervision, scheduling or communications to help offset it? As with all patterns in this report, the value lies less in the number itself and more in what it might reveal about the conditions surrounding it.”
Another insight: three “injury mechanisms” comprised more than 60% of the injuries:
Striking objects with a part of the body (33%)
Being hit by moving objects (17%)
Falls on the same level (13%)
In addition, the number of injuries relative to the number of incidents decreased 23% from 2018 to 2024.
“Site safety is never static,” the report states. “It’s shaped by thousands of daily decisions, countless processes and the lived experiences of everyone onsite. By drawing on years of usage data from the global HammerTech community, this report aims to make these trends more visible.
“These trends do not prescribe what must happen next but help give contractors the clarity and confidence to ask the questions to deliver most impact. Whether it’s refining morning briefings, focusing training or targeting investments, the goal is the same: to ensure everyone gets home safely at the end of the day.”
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