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S-16 ACCESS CONTROL TRENDS AND TECHNOLOGY 2016 JULY/AUGUST Mortise locks perform the same basic functions but are mortised into the edge of the door. These mortise devices offer ¾" latch bolts for higher level fire ratings and offer a wide range of functions. Some electrified mortise locks can also now monitor latch bolt status, door position, and even auxiliary deadbolt engagement. Exit Devices come in three basic types but always allow immediate free egress (except in delayed egress applications). These Panic Bars were developed to allow the door to be pushed open freely under crisis conditions to meet hazard egress requirements. Electric latch retraction or electrified unlocking trim are avail- able in new or retrofit applications for access control systems. • The Rim mounted exit device uses a latch to engage a simple sur face mounted strike on the edge of the door frame. A surface mounted elec- tric strike, an electrically unlocked exterior handle, or electric latch retraction can release the Rim Exit device from the outside. • With the Mortise Exit device, an actual lock assembly is mor- tised into the door edge, and operated by the panic bar. When locked, the Mortise Exit device can be opened from the outside by electrified exterior trim, or electric latch retraction. • Ver tic al R o d ex it d ev ic es are the most complex of all. These top and bottom latching rods may be surface mounted, on the face of the door, or concealed within the door to pre- vent damage. Top engagement only or three -point latching is sometimes necessary. Double door exits are commonly applied in high-occupancy areas. These large-volume exits can have a variety of device configurations. Doors can be secured independently with vertical- rod exit devices on each individual door leaf. Alternately, a vertical rod device can be installed on one leaf and a mortise exit device on the other with an overhead door coordinator insuring proper closure. In many cases, a cen- ter mullion may be installed, allowing each leaf to be secured with a much simpler (and cheaper) Rim or Mortise Exit device. Removable center mullions are quite popular in these applications, as they allow a wide opening for equip- ment access. Since building codes dictate hazard egress options, it is prudent to have an experienced AHC review any proposed modifications. Far easier than having the "Authority Having Jurisdiction" (AHJ) demand a do-over. Delayed egress options are avail- able for Magnetic Locks and Exit devices. This application is strictly controlled by fire codes. Special Applications • Retrofit: Electrically operated retrofit options are now available for most existing mechanical locking devices. It is often simpler and faster to just re p l a c e ex i s t i n g h a rd w a re w i t h a matching new electronically- operat- ed version. Most exit devices can be Electrified Mortise Lock Mortise Exit Device Rim Exit Device Electrified Cylindrical Lock Vertical Rod Exit Device