TM 5-805-8
hinges, doors equipped with an overhead door closing
series 1000, grade 1. Security grade mortise locks
device, and for unusually heavy doors such as lead-lined
complying with BHMA A156.13 will be specified when
doors. High frequency doors will have extra heavy four
extra strength is required. Lockets for door hardware in
bearing hinges. Doors with closer will have bearing hin-
bar-racks shall conform to type F-13, mortise lock, as
ges, not plain bearings. Plain bearing hinges will be
listed in BHMA A156.13. Mortise-type locks and latches
specified in all other cases.
for doors 1-3/4 inches thick and thicker will have
e. Number. The number of hinges are specified by the
adjustable bevel fronts or otherwise conform to the shape
size of door. Two hinges will be used for doors up to 5
of the door. Lock fronts for double-acting doors must be
feet high and three hinges will be used for doors from 5
rounded. Mortise locks will have armored fronts.
c. Deadlocks. Mortise-type deadlocks, cylinder
feet to 7 feet 6 inches. Doors of greater height will have
an additional hinge for each additional 2-1/2 feet or
operated, conforming to BHMA A156.5, series E 16000,
fraction thereof in height. Lead-lined doors 3 feet and
may be used where appropriate. Deadbolts will have a
larger should use pivots instead of hinges.
minimum 1-inch throw.
f. Size. Hinge size (length of pin exclusive of tips)
8. Exit devices and device accessories
will vary with the door thickness and will be sized based
on the minimum dimensions specified in DEI Basic
Architectural Hardware.
Exit devices will conform to BHMA A156.3. Generally,
g. Fastenings. Mountings will be as recommended by
vertical locking bars will be concealed in stiles of pairs of
the manufacturers. Screws and fasteners will come with
doors. It should be noted that concealed vertical locking
the hardware products. Fasteners exposed to the weather
bars, although more aesthetically pleasing, are more dif-
will be brass, bronze, or stainless steel. Brass or bronze
ficult to adjust. Mortise lock and rim (spacing of latch to
fasteners will not be used on fire doors. Tamperproof
roller is critical) devices are considered the best
type or through bolts will be selected for surface mounted
alternative because these are easier to install and maintain
hinges.
properly. The rim series has the least problems, followed
by mortise series, then surface vertical rod, and last the
7. Lockets, latchsets, and deadlocks
concealed vertical rod series. Rim devices can be used on
pairs of doors with either fixed or removable mullions.
To the maximum extent possible, lockets, latchsets, and
Rim or mortise devices should be the only series used on
deadlocks will be the products of a single manufacturer.
single doors. Overlapping astragals should be used only
To insure that the proposed locks and latches are in
when necessary, and not specified on pairs of doors
compliance with the BHMA standards under which the
where both leaves are equipped with vertical rod exit
items are specified, certificates of compliance from the
devices. Refer to figure 1 for examples of adjustable,
product manufacturers are required. In lieu of certificates,
fixed, and overlapping.
a statement indicating that the proposed hardware items
appear in the current applicable BHMA Directory of
Certified Locks and Latches is acceptable. Generally,
mortise locks together with deadbolts are the most secure
hardware sets as compared to bored lockets with dead-
bolts. Security deadbolts will have high security steel col-
lars to guard the cylinders. Lockets will be selected to
have roses, escutcheons, knobs, levers, turns, and cylinder
guards to cover all door preparation openings. Cylinders
will be designed for six or seven pins with paracentric
keyway. Normally, the six-pin cylinder will be used in
general purpose construction and the seven-pin cylinder
will be used primarily for more complicated keying
systems. Where key changes are required for security,
single-key cores will be specified. For asylum-type
construction, bit key operated locks may be required in
lieu of cylinder operated locks. Push/pull latches,
sometimes called hospital latches, will be used on
hospital patient doors and sometimes specified for
labeled rest room doors. Strike for wood frames and pairs
of wood doors will be furnished with wrought boxes.
a. Cylindrical or Bored-Type Lockets and Latchsets.
Bored-type lockets and latchsets will normally be series
4000, grade 1, conforming to BHMA A156.2.
b. Mortise-Type Lockets and Latchsets. Mortise-type
lockets and latchsets will normally be of BHMA A156.13,
2
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