User's Manual

GSM/802.11b RadioFrame System Method of Procedure
Pre-Installation
RadioFrame Networks, Inc.
21
3.3.1.1 Plumb and Squareness
Equipment shall be level and plumb. Equipment level shall be tested on a known flat
surface in at least two directions to verify accuracy.
Equipment shall be parallel or perpendicular to the surrounding walls and adjacent
installed equipment.
3.3.1.2 Anchoring
Anchoring is the mechanical fastening of the communications equipment to suitable
locations using hardware acceptable for the application.
Although every installation is unique, certain methods for anchoring shall be adhered to
for all installations. Typically, at least four anchor points shall be used on each item of
equipment mounted to the floor. The only exception is when the equipment manufacturer
supplies other than four mounting points.
3.3.1.3 Mounting on Concrete Floors
Equipment racks or cabinets should be positioned and anchored to the floor using
preferred mounting methods. In general, observe the following:
• An anchor specifically designed for concrete shall be used. The preferred method for
anchoring racks, or other ancillary equipment to concrete floors is to use flush-mount
expansion anchors properly sized for the application. Flush mount expansion anchors
do not extend above the surface of the floor and provide an easy bolt down. They
also provide the required pullout and shear strength. If at a later time equipment
needs to be moved, flush mount expansion anchors do not get in the way.
NOTE: Unless an isolating mounting scheme is used (refer to section 3.3.1.4 Isolated
Mounting, next in this section), ensure that no anchors come in contact with
reinforcing rods or wire mesh buried in the concrete; the rack shall be electrically
isolated from any other equipment or materials at the site.
• In applications where flush-mount expansion anchors are not preferred or
acceptable, then wedge-type stud anchors may be used.
• All concrete anchors shall be zinc-plated carbon steel for standard applications,
galvanized steel for mildly humid or corrosive environments, and yellow zinc or
stainless steel for humid, highly corrosive, or acidic environments. Minimum bolt
diameter shall be 10 mm (0.375 in.) with 12 mm (0.5 in.) preferred. Anchor
embedment depth should be at least 76 mm (3 in.) to provide good tensile and shear
strength. Follow manufacturer's instructions for depth reduction when rebar is
encountered. A heavy-duty washer should be part of the anchor assembly to ensure
the equipment is secure.
3.3.1.4 Isolated Mounting
Isolated mounting is recommended to prevent a second electrical path to ground through
the concrete floor, and is required for the installation of certain equipment. In these cases
expansion anchors are inserted into the concrete floor. However, isolation of the