Category A And B Doors

All intumescence and or gasketing is furnished by others.

Category a and b doors.

If you prefer an open look and feel entry doors. Fiberglass options combine the versatile designs of wooden doors with the strength of steel. For example for most applications the 2015 edition of the international building code ibc requires a two. Class c 0 75 hour approved for doors in corridor or room partition opening not exceeding 1 200 sq.

Steel front doors are stronger and more energy efficient but are limited on design styles. Rating of the fire door assembly is usually required to be 90 minutes aka b label. Category b doors a fire door that requires the use of an edge seal to comply with positive pressure requirements. Once tested the door and frame receive a label that describes the amount of time the component is expected to provide protection when exposed to fire.

Class b 1 5 hour approved for doors in vertical shall openings not exceeding 1 200 sq. Smoke seal labels in addition to standard fire ratings a 3 hour b 90 or 60 minute c 45 minute and 20 minute some positive pressure doors may also be required to carry a smoke seal s label. The andersen 2500 series self storing storm door is the andersen 2500 series self storing storm door is a heavy duty and seasonal ventilation storm door that offers a wide variety of features and options. Front door styles wooden doors have a classic look but require regular maintenance to keep them looking fresh.

To achieve the supplemental s label a door must also pass for smoke and air infiltration. When combined all of the components of the door form an assembly that protects the opening. 1 1 2 hour rating for a 2 hour wall. Doors are tested following standards including ul10b ul10c astm e2074 and nfpa 252.

No glass is allowed in these doors. These doors are usually used for stairwell doors but are sometimes used at all the rated walls in a building. In some cases category g sealing systems might be required on the meeting stiles of pairs of category a doors. The edge seals are typically added to the frame or field applied to the door i e.

Boasting glass from top to bottom to maximize your views this full light style storm door is low maintenance and durable for a long lasting use in your home. Category b doors a fire door slab that may have been evaluated with the addition of a category g edge sealing system between the door and frame. Doors with a 60 minute rating are also classified as b label doors and are used in some interior exit stairway and ramp enclosures. These door slabs systems may have been evaluated with an edge sealing system category g field applied to the labeled frame or door.

Class a 3 hour approved for doors in dividing fire walls with openings not exceeding 1 200 sq. Woodharbor 20 minute fire rated doors fall into category b classification as shown above.