The urge to wedge internal fire doors open is completely understandable. Especially when navigating a wheelchair or moving heavy equipment. But if fire doors are left unable to close, it could leave you, your business and your investment extremely vulnerable if a fire should break out.
Smoke can travel extremely quickly, and an indoor fire can become life threatening in just two minutes. If a fire door is wedged open, smoke and flames are free to traverse your corridors and communal spaces. This can lead to the spread of toxic fumes, as well as cutting off potential means of escape.
FD-30 rated fire doors will keep flames and smoke at bay for a minimum of 30 minutes. This should be ample time for the fire service to arrive and take steps to combat the fire. But, of course, these fire doors can only do their job if they are left closed at all times. Even a partially obstructed fire door is rendered useless if smoke and flames are left to pass through it.