In addition the requirements for visible fire alarms are required to meet the following standards.
Fire alarm pull station height requirements.
But when the wheelchair user must reach over an obstruction these heights may change.
Manual fire alarm boxes shall be red in color.
Manual fire alarm boxes pull stations the height of the manual fire alarm boxes shall be a minimum of 42 inches and a maximum of 54 inches measured vertically from the floor level to the activating handle or lever of the box.
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.
The requirements for manual pull stations as per nfpa 72 are pretty trivial and straight forward.
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.
Nfpa 72 requires that manual pull stations be installed within 60 inches of the exit doorway of each exit mounted between 42 inches and 48 inches to the center of the handle and among other things be red in color.
In addition the pull lever should be within reach range or between 48 inches and 15 inches above the finish floor or ground.