Technical data

CT31A. This optional heavy-duty caster support reduces the load bearing requirements of
the wall by supporting the center section weight when opened and closed (typically used
on 35 RU panel space models). Cabinet must be mounted 6" from the ground. Support
is constructed of formed, 14-ga. CRS and includes heavy-duty, zinc-plated caster with a
black, hard-tread wheel. The caster adjusts in height from 5
1
2" to 7
1
2" and is supplied with
drilling template for easy installation. Finished in black (Note: before installing the CT31A,
the center section guide plate must be removed) (Only one CT31A required per cabinet).
1601 JACK MCKAY BLVD. / ENNIS, TEXAS 75119 U.S.A.
TELEPHONE: (800) 876-3333 / FAX (800) 765-3435
AtlasSound.com
Specifications subject to change without notice
© 2007 Atlas Sound Printed in U.S.A. 000905 ATS002120 RevB 4/07 SL10-1098
401
TEN
Fig. 3: Rear Section Top & Bottom Flange
Conduit Knockout Array
4.50
1.50
2.88
1" KNOCKOUT
.50-.75 COMBO
KNOCKOUT
The sectional wall mounting cabinet shall be Atlas Sound Model __.
It shall be constructed of 16-gauge CRS throughout. Hinges shall be
bolted, not welded. All sections shall be of one-piece construction
with electric-welded seams and miters. Cabinet shall have provisions
which allow the unit to be inverted for accommodating left-hand
hinging applications. Rear section shall have concentric
1
2" (13mm)
and
3
4" (19mm) knockouts on the top and bottom surface panel, as
well as the flange panels at the top and bottom of the rear panel.
Center section shall be secured with screw-type locking rods and
alignment pins. The center section shall be equipped with adjustable,
front-to-rear mounting rails tapped with 10–32 holes on E.I.A. 19"
spacing. Units shall have slotted rail supports for mounting rail
adjustment and wire management purposes. Standard front door shall
be 2" (51mm) deep, and constructed of one-piece 16-ga. CRS, with
perforation vents and cylinder lock.
ARCHITECT AND ENGINEER SPECIFICATIONS
Ventilation
Stamped perforated vents, located on both sides (top and bottom) of the center section,
provide maximum ventilation for rack-mounted electronics (four vent patterns per side on 12" deep
series, eight per side on 15" deep.)
Structural Support
Series 300 cabinets offer exceptional structural support. The units' one-piece front and rear sections
are strengthened with frame flanges on bottom, top, and sides. Center sections also have "L"-
shaped gussets (brackets) which are plug-welded, joining bottom and top panels to side panels.
Series 3xx-12 and 3xx-15 have a total of 8 & 12 brackets, respectively. Rear sections have corner
brace supports which bridge the back and side panel (hinge side) giving the back (mounted) panel
extra reinforcement for tension relief (see Fig. 3). Units also have electric-welded seams and miters
which bolster the cabinets' overall bonding. The center section offers maximum reinforcement
provisions, such as a uniquely designed center section guide plate that reduces potential sagging by
distributing cabinet and equipment weight to rear section. The 11-ga., 1-
7
8" wide guide plate, which
mounts to the rear section's bottom flange, provides a
3
4" lip for added support to the center section
when the cabinet is open or closed. The plate also ensures that an equipment-weighted center
section will close properly, by "guiding" alignment pins into respective holes.