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Where fire-resistive door and shutter assemblies are required by this Code, the fire-resistive values of such assemblies and their classification shall be determined by the test procedure and the conditions of acceptance prescribed in the following document: Methods of Fire Tests of Door Assemblies – ASTM Designation: E152-56T.
(Prior code § 65-5.2)
Doors and shutters shall be classified in accordance with their fire-resistive qualities in accordance with requirements of this section.
(a) Class A Doors and Shutters.
(1) Class A doors and shutters shall be used for protection of openings in firewalls and shall be installed on both sides of walls.
(2) There shall be no glass panels in Class A doors and shutters.
(b) Class B Doors and Shutters.
(1) Class B doors and shutters shall be used where required elsewhere in this Code for protection of openings in vertical shafts and other openings.
(2) Class B doors may have an observation panel of standard wired glass having an exposed area not exceeding 100 square inches and a width or height not exceeding 12 inches.
(c) Class C Doors.
(1) Class C doors shall be used where required elsewhere in this Code for protection of openings between rooms or between rooms and corridors.
(2) Class C doors may have panels of standard wired glass. Exposed area of individual glass lights shall not exceed 1,296 square inches.
(d) Class D and E Doors and Shutters.
(1) Class D and E doors and shutters shall be used where required elsewhere in this Code for protection of openings in exterior walls.
(2) Glass lights for panels shall not be used in Class D doors. Panels of standard wired glass having an area not exceeding 720 square inches and a height not exceeding 54 inches may be used in Class E doors.
(Prior code § 65-5.4)
(Prior code § 65-5.5)
Type of Door | Class of Door | Maximum Size of Opening Not to Exceed | ||
Area Sq. Ft. | Height Ft. | Width Ft. |
Type of Door | Class of Door | Maximum Size of Opening Not to Exceed | ||
Area Sq. Ft. | Height Ft. | Width Ft. | ||
Hollow metal, swinging, in pairs | A-B-C-D(1)-E(1) | 10 | 8 | |
Hollow metal, swinging, in pairs | D(2)-E(2) | 10 | 6 | |
Hollow metal, swinging, single | A-B-C-D-E | 10 | 4 | |
Hollow metal, sliding | B-C | 8 | 8 | |
Metal-clad, paneled, swinging, in pairs | B-C-D(1)-E(1) | 8 | 8 | |
Metal-clad, paneled, swinging, in pairs | D(2)-E(2) | 8 | 6 | |
Metal-clad, paneled, swinging, single | B-C-D-E | 8 | 4 | |
Sheet metal, sliding, single or in pairs | A-B-C-D(1)-E(1) | 120 | 12 | 12 |
Sheet metal, swinging, in pairs | A-B-C-D(1)-E(1) | 12 | 10 | |
Sheet metal, swinging, in pairs | D(2)-E(2) | 10 | 6 | |
Sheet metal, swinging, single | A-B-C-D(1)-E(1) | 12 | 6 | |
Sheet metal, swinging, single | D(2)-E(2) | 10 | 4 | |
Steel, rolling or lift-up type | A-B-C-D(1)-E(1) | 120* | 12* | 12* |
Tin-clad, 3-ply, sliding | A | 120 | 12 | 12 |
Tin-clad, 3-ply, swinging, in pairs | A | 12 | 10 | |
Tin-clad, 3-ply, swinging, single | A | 12 | 6 | |
Tin-clad, 2-ply, counter-balanced | B | 10 | 8 | |
Tin-clad, 2-ply, sliding, single | B-C-D(1)-E(1) | 10 | 10 | |
Tin-clad, 2-ply, swinging, in pairs | D(1)-E(1) | 10 | 10 | |
Tin-clad, 2-ply, swinging, in pairs | D(2)-E(2) | 10 | 6 | |
Tin-clad, 2-ply, swinging, single | B-C-D(1)-E(1) | 10 | 6 | |
Tin-clad, 2-ply, swinging, single | D(2)-E(2) | 10 | 4 | |
NOTES: (1) Class D and E doors, other than doors leading to fire escapes. (2) Class D and E doors leading to fire escapes. | ||||
* Openings not exceeding 24 feet in width, 24 feet in height and 350 square feet in area shall be permitted when oversize openings are required for passage of motor vehicles, railroad cars and similar uses. | ||||
(a) Fire-resistive door and shutter assemblies for specific conditions of use in the “Fire Protection Equipment List”, Underwriters' Laboratories, Inc., January, 1959, shall be acceptable as meeting the requirements of this section.
(b) Nothing in this section shall preclude the use of other opening protective assemblies meeting the required test standards.
(Prior code § 65-5.6)
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