The exposure mechanisms that generate the most serious hand injuries across Canadian industry are not random. They are concentrated in a predictable set of task types. Each represents a moment where the hand is either required — or believed to be required — at a hazard interface:
{[
["Guiding suspended loads","Final positioning of crane-lifted components — valves, pipe spools, structural members, equipment"],
["Landing and aligning loads","The last 300 mm of every lift: the load approaching its final resting position, requiring correction and alignment"],
["Tubular and pipe handling","Rolling, positioning, and aligning pipe, casing, and conduit in oil and gas, construction and industrial settings"],
["Striking and impact tasks","Holding chisels, punches, shims or wedges while a second person strikes — or holding a wrench while torque is applied"],
["Machine feeding and positioning","Placing material into, or removing material from, a machine — press, punch, saw, mill — at or near the operating zone"],
["Maintenance — confined access","Reaching into equipment to position, align or hold components during repair or installation under time pressure"],
["Cargo and freight handling","Guiding suspended or crane-moved cargo to its landed or secured position in ports, terminals and transport"],
["Forestry and mill operations","Positioning logs, timber sections and materials on infeed, transfer and processing lines"]
].map(([title, desc]) => `
${title}
${desc}
`).join('')}
The Last 300 mm Rule™ — codified in HSF exposure doctrine — identifies the final phase of any lift or positioning task as the highest-exposure moment. It is the zone in which taglines are no longer effective, engineering distance has typically collapsed to zero, and the worker's hand becomes the default control surface. This is the zone that gloves cannot protect and that engineering controls must address.