Steel stiffened core doors feature steel ribs in the interior of the door and are used where durability and security are important.
Fire door core types.
Core types the backbone of every door.
Construction makes them resistant to expansion and contraction due to humidity changes.
Wood door cores are central to the door s performance and durability.
The core type can also greatly affect the cost of the wood doors on your project we ll briefly cover each core type and talk about some of their benefits.
Each core type has benefits and specific applications where they are recommended or even required to be used.
Solid core doors offer good fire resistance when they are at least 1 3 4 inches thick.
They weigh less and are expected to cost less than solid core.
Hollow metal doors with this core type are most often used at exterior openings and can be fire rated up to 3 hours.
Heavy duty 18 gauge steel doors.
Most steel doors outlast their wood counterparts by over 10 years are better insulated vandal resistant and longer lasting than wood doors or fiberglass doors.
Steelcraft l series optional core.
Rigid honeycomb core.
The first level of insulated door core is the polystyrene which is a slab of foam that is placed in the core of the door.
Not available fire rated.
20 45 60 90 minute or 3 hour label.
Steel is the sole door material to deliver a 3 hour fire rating.
Polyurethane core doors are suitable for exterior openings in cold climates.
Steelcraft h series optional core.
Mineral fire doors consist of the mineral core itself with lengths of firestop material used for stiles rails and blocking.
The available door thickness is a nominal 1 3 4.
The insulation value is much higher than the honeycomb but lower than the polyurethane.
Labeled fire doors control the spread of fire and smoke for up to 3 hours.
The window and door manufacturers association wdma has developed performance standards for architectural grade wood doors determined by duty levels.
Hollow core doors are usually purchased for two basic reasons.
Oshkosh door company offers non rated fire rated and speciality cores to meet the specific demands of nearly every environment.
This is a laminated door construction.