Hinge Height On Fire Doors

25 mm of the height of the door leaves.

Hinge height on fire doors.

Modern flatted properties are usually fitted with external fireproof doors as standard and most of these are flush fire doors this is due to our greater understanding of the importance of preventing and containing a blaze to allow the maximum time possible to vacate a burning building. Once these dimensions are known the formula can then be applied. The upper hinge is 7 from top of door to top of hinge the bottom hinge is 9 from the floor. On heavier doors the middle one might be 6 9 from top one also depends on the spec.

For doors up to 2 1 4 thick the hinge is set back 1 4 from the back face of the door. The height of the hinge leaf. Make another mark on the door through the center screw hole of the hinge. Doors up to 60 inches in height shall be provided with 2 hinges and an additional hinge for each additional 30 inches of height or fraction thereof.

These also appear in 80 2016. For a standard internal door its door lock is normally 42 from the floor to the centre of the latch. Lay the top hinge against the side of the door with the top edge on your mark. The most common hinge height size is 4 1 2 then 5 followed by 3 1 2 4 and 6 then other sizes.

20 gage door constructions are approved for smaller door sizes than what is shown above. Depends on weight of door the norm 6 from top 9 from bottom middle in the middle of the two. Two paragraphs were added in the 2013 edition of nfpa 80 to address continuous hinges used on fire doors. 8 0 x 9 0 double door or pairs.

According to nfpa 80 if a fire door is more than 60 inches tall it requires at least 3 hinges. The hinge leaf thickness. 6 4 3 1 6 the length of continuous hinges shall be within 1 in. Fire ratings for doors are influenced by but not limited to the following items.

Steel gage of the door example. Maximum doors size for fire ratings is influenced by but not limited to the following items. From under head cl 9 3 4 top of door 9 5 8 from bottom of frame cl 10 3 8 bottom of door 9 5 8 due to the the fractional calculations the bottom hinge cl may vary plus or minus 1 64 center two hinges are equally spaced between top and bottom. Hinge width does not impact frame hardware measurement.

Wood metal door and hollow metal frame door is inset approximately 1 8. Just for fun i went back to the oldest edition of nfpa 80 that i have 1968 and it was a requirement then.