Category A And B Doors

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.

Category a and b doors.

The edge seals are typically added to the frame or field applied to the door i e. Doors are tested following standards including ul10b ul10c astm e2074 and nfpa 252. A fire door that requires the addition of and edge seal to comply with positive pressure requirements. These doors are usually used for stairwell doors but are sometimes used at all the rated walls in a building.

Steel front doors are stronger and more energy efficient but are limited on design styles. 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. Doors with a 60 minute rating are also classified as b label doors and are used in some interior exit stairway and ramp enclosures.

Woodharbor 20 minute fire rated doors fall into category b classification as shown above. Class a 3 hour approved for doors in dividing fire walls with openings not exceeding 1 200 sq. All intumescence and or gasketing is furnished by others. Rating of the fire door assembly is usually required to be 90 minutes aka b label.

1 1 2 hour rating for a 2 hour wall. Fiberglass options combine the versatile designs of wooden doors with the strength of steel. In some cases category g sealing systems might be required on the meeting stiles of pairs of category a doors. These doors are used for openings in walls separating buildings that are joined together.

For example for most applications the 2015 edition of the international building code ibc requires a two. 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 that requires the use of an edge seal to comply with positive pressure requirements. To achieve the supplemental s label a door must also pass for smoke and air infiltration.

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. 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. 100 square inches of exposed glass is allowed. No glass is allowed in these doors.

Class c 0 75 hour approved for doors in corridor or room partition opening not exceeding 1 200 sq. These door slabs systems may have been evaluated with an edge sealing system category g field applied to the labeled frame or door.