What is fire cut beam?

A fire cut beam is a structural beam that is designed to resist fire for a certain period of time. It is composed of wooden planks that are cut in a specialized way that allows them to shift and move when exposed to high temperatures, thus preventing the beam from collapsing. The fire cut technique involves creating a groove in the center of the beam to create a "weak spot" that will allow it to bow and twist instead of breaking under the stress of heat.

Fire cut beams are commonly used in older buildings to protect against structural failure during a fire. They are also used in modern construction to meet fire code requirements and provide extra fire resistance. The amount of time a fire cut beam can withstand intense heat will depend on the specific design and materials used.