Holding and Carrying Nail Guns
Nail guns with contact firing and single actuation triggers will fire if the trigger is being squeezed and the safety contact tip gets knocked or pushed into an object or person by mistake. For example, a framer might knock his leg going down a ladder or bump into a co-worker passing through a doorway. Contact trigger nailers can release multiple nails and single actuation trigger nailers can release a single nail to cause injury.
Holding or carrying contact trigger or single actuation trigger nail guns with the trigger squeezed increases the risk of unintended nail discharge. Construction workers tend to keep a finger on the trigger because it is more natural to hold and carry an 8-pound nail gun using a full, four-finger grip. Tool manufacturers, however, do warn against it.
Real World Accident
A contractor was on a roof with a framing nailer. He had his finger on the trigger with the autofire engaged. However, when he sat up from a crouched position, he accidentally pushed the tip of the gun against his knee, causing the gun to fire. The nail grazed his bone inside his leg and he was unable to straighten his leg. Paramedics had to carry him off the roof and down the stairs. He didn't have to undergo surgery, as doctors were able to remove the nail.
Knowledge Check Choose the best answer for the question.
3-2. What practice increases the risk of injury when holding or carrying contact firing trigger or single actuation trigger nail guns?
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