Many buildings are built with fire-resistant doors to separate different parts of buildings and to allow people to be protected from fire and smoke. When using a cabin hook in such a situation, one should keep in mind that a fire-resistant door is an expensive and heavy item, and it only works as a fire door if it is always closed. To hold an often heavy fire door open simply, (magnetic) door holders are used that release when a building's fire alarm system is activated. As cabin hooks must be activated manually, they are impractical for fire doors.