¾ Hour Rating

Maximum door size
Minimum gauge
Single
Pairs
Double Egress (pair)
Vision panels
4’0″ x 8’0″
20, 18, 16
X
X
1296 sq. in. per opening
4’0″ x 7’2″
18, 16
X
X
X
1296 sq. in. per opening
3’0″ x 7’0″ Flush or embossed
20, 22
X
X
1296 sq. in. per opening
4’0″ x 9’0″ 3/4 latch bolt required for over 80
16, 18
X
1296 sq. in. per opening

1 ½ Hour rating

Maximum door size
Minimum gauge
Single
Pairs
Double Egress (pair)
Vision panels
4’0″ x 8’0″
20, 18, 16
X
X
100 sq. in. per door
4’0″ x 7’2″
18, 16
X
X
X
100 sq. in. per door
3’0″ x 7’0″ Flush or embossed
20, 22
X
X
100 sq. in. per door
4’0″ x 9’0″ 3/4″ latch bolt required for over 8’0″
16, 18
X
100 sq. in. per door

3 Hour rating

Maximum door size
Minimum gauge
Single
Pairs
Double Egress (pair)
Vision panels
4’0″ x 10’0″ 3 point concealed latch required in singles or active leaf. 2 point concealed latch in inactive leaf
18, 16
X
X
100 sq. in. per door as permitted by AHJ
4’0″ x 8’0″
20, 18, 16
X
X
100 sq. in. per door as permitted by AHJ

Fire rating door notes:

  • Fire rated louvers up to 24” x 24” are permitted up to a maximum fire rating of 1 ½ hours
  • Maximum of 2 fire rated door viewers are permitted in a fire door up to a maximum fire rating of 1 ½ hour

Fire Rated Hollow Metal Frames/Screens/Windows

Product Type
Profile: Min/Max
Minimum Gauge
Single
Pairs
Maximum Rating
Wall Type
3 or 4 sided frame welded
5¾” / 13″
16
4’0″ x 10’0″
8’0″ x 10’0″
3 hour
Masonry or Drywall
3 or 4 sided frame welded or knockdown
4¾” / 13″
18
4’0″ x 8’0″
8’0″ x 8’0″
3 hour
Masonry only
3 or 4 sided frame welded, knockdown, or adjustable
4½” / 13″
18
3’0″ x 7’0″
6’0″ x 7’0″
1½ hour
Masonry or Drywall
Double Egress frame
5¾”
16
N/A
8’0″ x 7’2″
1½ hour
Masonry or Drywall
Multi-Opening frame. Max 4 doors per frame. Max door width 40
5¾” / 13″
16
N/A
12’10” x 7’2″ 5/8″
1½ hour
Drywall only
Multi-Opening frame. Max 4 doors per frame. Max door width 40
5¾” / 13″
16
N/A
12’10” x 7’4″ overall
1½ hour
Masonry only
Screen/Window/Transom
4½” / 13″
16
13′ 1¾” x 10’0″ overall
13′ 1¾” x 10’0″ overall
¾ hour
Masonry or Drywall
Notes for window openings in fire rated Screen/Window/Transom:
Maximum allowable exposed glass: 1296 sq. in.
No horizontal dimension to exceed 46 ¾”
No vertical dimension to exceed 54″