Publish Time: 2021-09-06 Origin: D and D Hardware
These standards are recommended by the Hollow Metal Manufacturers Association as representing the long accepted usual preferences of both architects and users under normal conditions of use. Under some circumstances, these standard locations are inadvisable for certain items based on accessibility codes. For example, a lower position for the deadlock is possible, when intended users are kids or the handicapped, positioning the user handled items is required other than these recommended standard locations.
Hardware location and floor conditions
As shown on the picture, all hardware items except the upper and intermediate hinges are located in specific dimension from bottom to middle, making the locations of all user-handled items be at the same level whatever the door’s height is. The floor is defined as the top of the concrete or structural slab.
Butt Hinge
The three hinges shown on the picture are recommended for doors over 5ft. (1524 mm) and under 7ft 6 \in. (2286mm) in height. For doors of higher heights, where four or more hinges are needed, the top and bottom hinges are located as shown, the length of the intermediate hinges to the upper ones and lower ones is equal. The hinge backset is 1/4 inch. (6.4mm).
Lock Set
Whatever type of lock or latch is, the centerline of the lever or knob is located 38in (965mm) from the floor, for the convenience of users. This will result in some variation in the strike location, depending on the type of lock.
Auxiliary Deadlock and Latch
The recommended location for the deadlock is 46 in (1168mm) to centerline so as to avoid impact with through bolts and leave space for other hardware. ADA requires that the centerline of operating element of cylinder be no more than 48 in (1219 mm) above floor.
Roller Latch
The recommended location is 46 in. (1168 mm) to centerline of latch. Roller latches are generally used with dummy knobs or push/ pulls.
Exit Device
Locations may vary depending on manufacturers’ recommendations or demands by code.
Push-Pull Hardware
The recommended location for the center of the grip on a door pull or on a push plate, and the centerline of a push/pull bar is 46in (1168mm).
Door Control Devices (Closers, Holders, Stops, Operators)
Locations may vary depending on manufacturers’ recommendations or demands by code.
A strong door lock, high-durability hinge, tough door handles, and a solid face plate are absolute necessities. Consumers prefer hardware that’s easy to operate and provides excellent security and durability simultaneously.
D and D HARDWARE's metal door hardware have passed rigorous safety testing (including BS EN, CE, UL, ANSI and BHMA) for education, healthcare, hospitality, residential and commercial applications.
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Reference
HARDWARE SELECTION FOR HOLLOW METAL DOORS AND FRAMES-HMMA 831-11
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