Project Number: 228730
WWTE SCADA Upgrades
Issue Date: August 2017 Nashua, NH
2.02 SUPPORTING DEVICES
A. Supports, support hardware, and fasteners shall be protected with zinc coating or
with treatment of equivalent corrosion resistance using approved alternative
treatment, finish, or inherent material characteristic. Products for use outdoors
shall be hot dip galvanized unless material is inherently corrosion resistant.
B. Refer to Table 2.02A for approved supporting device installation guidelines.
1. Conduit Supports
a.
Single run hangers: Galvanized steel conduit straps or clamps, or
cast metal beam clamps. Perforated straps and spring steel clips
and clamps will not be permitted.
Group run hangers: Minimum 12-gauge galvanized performed U-
channel rack with conduit fittings; 25 percent spare capacity.
Hanger rods: Threaded steel, 3/8-inch diameter, or as identified on
the Drawings.
Vertical run supports: Minimum 12-gauge galvanized performed
U-channel struts with conduit fittings.
2. Equipment and Lighting Supports
a. U-channel: 12-gauge galvanized performed U-channel struts with
fixture and conduit fittings, as applicable, unless indicated
otherwise on the Drawings.
3. Corrosive Area Supports
a. Clamp Hangers, Pipe Straps, and Clamp Back Spacers for use with
PVC-coated rigid metal conduit shall have 40mil gray PVC
exterior coating.
b. Clamp Hangers, Pipe Straps, etc. for use with PVC nonmetallic
conduit shall be of nonmetallic PVC material.
C. Hanger Rods: 20mil gray PVC exterior coated rod with threaded
ends only 3/8” and 1/2” sizes as required.
d. Strut Support: 20mil gray PVC exterior coating strut. Standard
WOODARD & CURRAN
channel, slotted channel, and back to back channel are acceptable.
RACEWAYS, BOXES AND SUPPORTING DEVICES
26 05 34-5
