In this case height is measured from the floor to the operable part of each manual fire alarm box according to section 5 13 4 of nfpa 72 2007 edition mounting height must be between 3 and 4 feet from floor to handle.
Fire alarm pull station height requirements.
The requirements for manual pull stations as per nfpa 72 are pretty trivial and straight forward.
In addition the pull lever should be within reach range or between 48 inches and 15 inches above the finish floor or ground.
Under the ada audible alarms must have a sound level that is not greater than 110 db.
If the path to the ada compliant fire extinguisher or pull station is unobstructed the operable part must be placed from 15 inches to 48 inches off of the finished floor or ground.
Below we have an picture of a typical manual pull station.
Manual fire alarm boxes shall be red in color.
But when the wheelchair user must reach over an obstruction these heights may change.
Alarms should initiate by manual fire alarm boxes commonly called pull stations 14 3 4 2 1 and 15 3 4 2 1 but the code allows for the exclusion of manual boxes in some spaces such as laboratories and cafeterias serviced by an automatic sprinkler system or other detection devices 14 3 4 2 3 1 and 15 3 4 2 3 1.