By and crushing incidents1 2 3 involving overhead doors that are avoidable given regular door maintenance inspections and the inclusion of recommended safety entrapment devices.
Overhead door entrapment protection.
The bottom sensing edge stops and reverses the door upon contact with an obstruction.
Warning signals such as audible alarms or flashing lights represent the third line of defense.
The door will require a manual override before any automatic actuation device like a timer can be used after the reversing function occurred.
A a combination sectional overhead garage door operator system as described in 1211 6 c.
1 the operator by manufacturer and model.
The criteria for an inherent entrapment protection system is that the system shall sense an obstruction and stop the motion of the door or gate and initiate reversal of the door gate within two seconds.
Sensing edges provide entrapment protection for motor operated doors by offering an auto reverse or auto stop feature.
Fortunately injuries from overhead doors and roll up doors can be avoided.
2 the doors by manufacturer model and maximum and minimum door width and height required for compliance to the entrapment protection requirements.
3 the hardware required to.
And b for use only with vertically moving garage doors.
Ohs compliance overhead doors systems are subject to ohs compliance requirements.
In alberta the applicable standards are part 3 12 d of the code4 which.
Additionally the revised ul standard requires that the instructions for combination sectional overhead gdos must specify.
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