Q: A while ago, you made a posting that said a deadbolt lock on a door in the means of egress (such as an aluminum-framed glass sliding door at the entrance of the hospital) would be permitted as long as the door is not a fire-rated door and has no other releasing devices such as a lever, knob or crash-bar. I do not believe that is true, as a deadbolt lock with a thumb-turn should not be permitted in the mean of egress. Please advise…
A: After reconsideration, I believe you are correct. I looked up the commentary under 18.104.22.168.10 in the 2012 LSC Handbook, and it says this about the releasing device on the door:
“Examples of devices that might be arranged to release latches include knobs, levers, and bars. This requirement is permitted to be satisfied by the use of conventional types of hardware, whereby the door is released by turning a lever, knob, or handle or by pushing against a bar, but not by unfamiliar methods of operation, such as a blow to break glass…. The operating devices should be capable of being operated with one hand and should not require tight grasping, tight pinching, or twisting of the wrist to operate.”
It is rather obvious that a standard deadbolt lock with a thumb-turn device does require a tight grasping, twisting of the wrist to operate. So, I agree with you that it would not be permitted in the arrangement as described.
Thanks for bringing this to my attention… I do apologize for the confusion and misinformation.