Hinge Height On Fire Doors

For a standard internal door its door lock is normally 42 from the floor to the centre of the latch. Door hardware measurements hinge height. Steel gage of the door example.

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The upper hinge is 7 from top of door to top of hinge the bottom hinge is 9 from the floor.

Hinge height on fire doors.

The most common hinge height size is 4 1 2 then 5 followed by 3 1 2 4 and 6 then other sizes. Lay the top hinge against the side of the door with the top edge on your mark. Measure 5 inches from the top of the door. Just for fun i went back to the oldest edition of nfpa 80 that i have 1968 and it was a requirement then.

Fire ratings for doors are influenced by but not limited to the following items. Once these dimensions are known the formula can then be applied. Make another mark on the door through the center screw hole of the hinge. Maximum doors size for fire ratings is influenced by but not limited to the following items.

Hinge width does not impact frame hardware measurement. 25 mm of the height of the door leaves. 6 4 3 1 6 the length of continuous hinges shall be within 1 in. 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. 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. Two paragraphs were added in the 2013 edition of nfpa 80 to address continuous hinges used on fire doors. For doors over to 2 1 4 thick the hinge is set back 3 8 from the back face of the door.

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. 8 0 x 9 0 double door or pairs. For doors up to 2 1 4 thick the hinge is set back 1 4 from the back face of the door. Wood metal door and hollow metal frame door is inset approximately 1 8.

The height of the hinge leaf. These also appear in 80 2016. 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. The hinge leaf thickness.

According to nfpa 80 if a fire door is more than 60 inches tall it requires at least 3 hinges. On heavier doors the middle one might be 6 9 from top one also depends on the spec.

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