Hollow metal does a better job of absorbing and dispersing impacts, which lessens the chances of breaking, cracking, or denting. And it also makes it much more difficult to bust down the frame because hollow metal doors won't transfer the damage to the edges like solid metal sometimes can. And hollow metal doors also have high fire ratings, being as they are, fire resistant. 2. Long Durability. Hollow metal doors/frames will last many, many years without any damage. Weather will not hurt them. They resist both hot/cold, extreme temperatures, high/low humidity, rain, snow, frost, and more.
Fire-Rated Steel Doors & Frames | Hollow Metal Applications - SteelcraftFire ratings range from 20 minutes to 3 hours. Hollow metal is the only door material widely available with a 3 hour label. Steelcraft's fire rating capabilities include the use of ceramic glass and special glazing compounds.