Lock and door hardware choices may also be determined by fire and building codes. Fire standards are set by the National Fire Protection Association (NFPA), but it is important to follow local codes. Most unfortunately, we have not found consistent enforcement of these codes. It is imperative that you check with local authorities. In general, in commercial and business applications, fire exit devices should be installed on all marked fire exits. Exceptions may be made for entrances which are to remain unlocked during all business hours. Cylindrical locks are not recommended for use on marked fire exits.
In residential applications, we never recommend double-sided deadbolts (keyed on both sides) on exterior doors. There is an interesting report on the NFPA website that includes information on catastrophic fires in 2005. The deadliest residential fire that year included deaths apparently caused by the occupants' inability to operate deadbolt lock from the inside. The NFPA site also includes recommendations for protecting doors near glass, without resorting to double-sided deadbolts.