2.5.1.4
Frequency of Operation
With proper maintenance, door assemblies shall function properly through
100,000 cycles and 15-year service life minimum without the shielding
effectiveness decreasing below the overall shield required attenuation.
2.5.1.5
Electric Interlocking Devices
Electric interlocking devices shall be provided for vestibules equipped
with shielded doors at each end. Electric interlocking devices shall be
provided so that shielded doors at the ends of the vestibule cannot be
opened at the same time during normal operation. A manual override shall
be provided to allow emergency egress, and an audible alarm shall be
provided to indicate that doors at each end of the vestibule are open. The
alarm will continue to sound while both doors are open. The Contractor
shall provide a low-voltage piezoelectric-type alarm, in a tamperproof
enclosure, at a location shown on the project drawings or as directed by
the Contracting Officer's representative. The sound intensity shall be 45
dBA minimum at 3.05 m 10 feet. Lights shall be provided on the side of
each door outside the vestibule to indicate that the other door is open.
Interlock systems may be integrated into a cypher lock system. The
interlock system shall be powered by an uninterruptible power source and
shall be fail-safe in an unlocked condition in the event of a power failure.
2.5.1.6
Electric Connectivity
Electric connectivity for sensors, alarms, and electric interlocking
devices shall be installed in accordance with the door manufacturer's
instructions, the approved drawings, and Section 16402 INTERIOR
DISTRIBUTION SYSTEM.
2.5.1.7
Threshold Alarm
A press-at-any-point ribbon switch shall be applied to the threshold.
The
switch shall enunciate an alarm whenever pressure is applied to the
threshold of the EM shielded door.
2.5.1.8
Hold Open and Stop Device
Each EM shielded door leaf shall be provided with a hold open and stop
device permanently attached to the door leaf. Shielded doors shall have a
fastener plate welded onto the door. The device shall not interfere with
the finger stock. Drilling or tapping of the shielded door will not be
allowed.
2.5.1.9
Emergency Exit Hardware
Emergency exit EM shielded doors shall be equipped with single motion
egress hardware. The force required to latch and unlatch emergency exit
hardware on EM shielded doors shall meet life safety code NFPA 101. Field
alterations or modifications to panic hardware will not be allowed.
2.5.1.10
Finish
EM shielded doors shall be factory prime painted with zinc chromate primer.
Doors may be factory finish painted or galvanized. The Contractor shall
touch up any damaged finish.
SECTION 13095A
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