Thumb turns on emergency exit doors

[The Colonel]

Out of interest conducted a fire risk assessment on a local factory that makes high spec steel fire doors this morning. Following an audit by the local fire safety officer they were following his advice and fitting all the exit doors from the plant with thumbwheel turn devices instead of key operated locks on the inside. Taking into account the size of the work force (50) and how familiar they were with things I had no problem in agreeing that the thumb wheels were a reasonable alternative.