Specification
Section 27 0528.33
DEVICE BOXES FOR COMMUNICATIONS SYSTEMS
27 0528.33 - 2
1) Steel, 0.0625 in (1.59 mm) thickness (minimum)
2) Galvanized zinc coating, 0.0005 in (0.013 mm) (minimum) thickness on the exterior
surface of box and 0.00015 in (0.0038 mm) (minimum) thickness on the interior
surface of box.
c. Construction:
1) Cleanly punched knockouts
2) Welded at 8 points (minimum)
3) Softened edges (no sharp edges)
d. Grounding:
1) 2 threaded holes for grounding screws, arranged such that at least one hole is
usable regardless of box orientation.
e. Mounting/Attachment Features:
1) For Cut-in Mounting: 4 holes (0.1875 in (4.76 mm) diameter) on one side
2) For Concrete Form Mounting: 1 mounting hole knockout and 2 anti-rotation holes
(0.25 in (6.35 mm) diameter) on back for use with Concrete Box Holder
3) For Back Support Mounting: 2 holes (0.25 in (6.35 mm) diameter) on back
4) For Box Support Bracket Installation: 4 tabs with tapped holes (8-32) on front of box
5) For Integrated Bracket Mounting: Offsets to match conduit bending. Includes a tab
for guiding box recess depth to account for screw heads behind gypsum board.
f. Testing / Listing:
1) Intertek ETL Listed
2. Knockout Configurations
a. Boxes with an integrated stud-mount bracket shall have similar knockout configurations on
3 sides. Otherwise, boxes shall have similar knockout configurations on all 4 sides.
b. Boxes with a 1-inch trade size (27 mm) knockout and a 1¼-inch trade size(35 mm)
knockout per side:
1) STEEL CITY 5 Square® Telecommunications Boxes, 82181T-1-114 (without
bracket)
2) STEEL CITY 5 Square® Telecommunications Bracket Boxes, 82181T-1-114-CV
(with bracket for attaching to stud)
c. Boxes with a 1-inch trade size (27 mm) knockout, a ¾-inch trade size (21 mm) knockout
and a ½”-inch trade size (16 mm) knockout per side:
1) STEEL CITY 5 Square® Telecommunications Boxes, 82181T-1234-1 (without
bracket)
2) STEEL CITY 5 Square® Telecommunications Bracket Boxes, 82181T-1234-1CV
(with bracket for attaching to stud)
d. Boxes with two 1-inch trade size (27 mm) knockouts knockout per side:
1) STEEL CITY 5 Square® Telecommunications Boxes, 82181T-1 (without bracket)
2) STEEL CITY 5 Square® Telecommunications Bracket Boxes, 82181T-1-CV (with
bracket for attaching to stud)
B. Box Support Brackets: Rough-in brackets for mounting multiple device boxes in a single stud space.
1. Brackets shall have the following characteristics:
a. Materials:
1) Steel, 0.6858mm) thickness (minimum)
2) Galvanized zinc coating, 0.013mm) (minimum) thickness on both sides of bracket.
b. Construction:
1) Cleanly punched knockouts
2) Softened edges (no sharp edges)
c. Mounting/Attachment Features:
1) Centerline and mid-line markings for device box installation
2) Offset mounting wings allowing recessed mounting to account for screw heads
behind gypsum board.
3) Support 5 Square® device boxes, 4 11/16 device boxes and 4 square device boxes.