mm 1/4 inch thick plate and shall enclose the entire latching mechanism.
2.2.2.6
Latches
**************************************************************************
NOTE: Retain lever type latches for reinforced
concrete doors.
**************************************************************************
Latches (latch bolts) shall be manufactured of structural quality steel and
the latch bolt throw shall not be less than 19 mm 3/4 inch. Latch bolts
shall be the sliding type in which the latch bolt slides into a matching
strike in the door frame [or the lever type in which the latch bolt rotates
into a groove in the frame as specified or indicated] [except that latches
for doors with [mortise lock and latch sets] [and] [exit devices] shall be
the sliding type]. Manually operated latches shall draw the door toward
the frame during latching.
2.2.2.7
Handle
**************************************************************************
NOTE: Wheel or spoke handle options are recommended
for structural steel doors when gasket seals are
specified.
**************************************************************************
[Handles for doors without locks shall be manufactured of steel castings,
forgings, pipe, round tubing, bar, or plate and shall be one piece or have
welded joints except that wheel handles can be manufactured of aluminum
castings.] [Handles for doors with mortise lock and latch sets shall be
manufactured of [steel castings] [or] [stainless steel].] Latch handles
shall be firmly fastened to axles. Lever handles shall be perpendicular to
the door edge when latches are engaged. [Single lever handles shall be
located at the stile opposite the hinges.] [[Wheel] [and spoke lever]
[Spoke lever] handles shall be located approximately halfway between the
stiles.]
2.2.3
Mortise Lock and Latch Set
**************************************************************************
NOTE: Mortise lock and latch sets are practical
only for hollow metal doors. These lock and latch
sets are special built and are not normally cycle
tested as specified in BHMA A156.13. Mortise lock
and latch sets are usually specified only when a
deadbolt function is required.
**************************************************************************
Lever handles shall release latches using a torque not exceeding 3 Newton
meters 27 lb-in.. Latches (latch bolts) shall be located at the stiles and
operated from a single lever handle. Only one deadbolt shall be provided.
The deadbolt shall be manufactured of structural quality steel and the
deadbolt throw shall not be less than 25 mm 1 inch. Mortise locks shall be
provided with armored fronts. The function numbers for mortise locks shall
be as defined in BHMA A156.13.
2.2.4
Keying
[Keying shall conform to Section 08710 DOOR HARDWARE.] [Change keys for
SECTION 08390
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