Cut Sheet

Metal Framing Channels — Overview
Copper Plated (“T” inserted as the second digit
of the part number; Example: CTL-710-2)
Plain steel proceeds through a series of rinse tanks to clean the material
surface. Once cleaned, the fabricated part is etched by dipping into an
acid pickle bath to prepare the surface for adhesion. Copper is electrically
applied by submerging in a copper bath. To seal the finish, the product
continues to a sealer tank and is then dried by forced hot air.
Black (Suffix B)
A black finish is raw steel with only a light oil finish as supplied
by the steel manufacturer. There is no protection against red rust.
Stainless Steel (Suffix SS)
Superstrut channel is supplied in type 304 stainless steel when
required. Type 316 stainless steel may be available upon request.
Aluminum (Suffix AL)
Superstrut channel and hardware are available in aluminum.
Warning: Load tables, charts and design criteria provided in this catalog
are intended as guides only. Selection of proper product, installation
intervals, erection and placement are the responsibility of the user.
Superstrut
®
products are intended to be used for the support and bracing
of fixtures, cable, pipe and conduit. Improper use or installation may result
in injury to persons or damage of property.
Material and finish specifications are subject to change without notice.
GoldGalv
®
The standard GoldGalv
®
finish is made up of a multi-step electrogalvanizing
and zinc dichromate process. The trivalent Chromium finish is applied over the
zinc, producing a chemically bonded non-porous barrier for protection from
moisture and air. The .5 mil electro-plated zinc and gold trivalent Chromium
finish provide all of the features and protection of hexavalent Chromium
without the use of the chemical.
Green or White Urethane Powder Coated (Suffix GR or WH)
Urethane powder resins are applied electrostatically to the steel after
fabrication. Once the material is completely covered with the powder-form
urethane, it proceeds through a 400˚ baking process for ten minutes,
creating a chemical bond. This results in a minimum of 1.5 mil thickness
of urethane coating, providing excellent resistance to chipping or peeling.
Pregalvanized (Suffix PG)
A zinc coating is applied by hot-dipping the steel coil at the mill prior to
fabrication. Once the material is worked by roll-forming, cutting or punching,
minimal protection is provided for raw edges. This weakness is typical with
precoated material and affects the channel section around holes, extreme
ends and the edges of the “U” shape lips. Superstrut pregalvanized
material is in conformance with ASTM A-525/G-90 specification standards,
representing 0.90 ounces of zinc per square foot of steel. This finish is
often referred to as “hot-dipped mill galvanized” or “mill galvanized.”
Hot-Dipped Galvanized (Suffix HDG)
The material is zinc coated after fabrication, providing total product
protection on all surfaces. The fabricated channel or fitting is suspended
and then dipped into tanks of hot zinc for a prolonged period, creating a
coherent bond. The result is superior corrosion resistance as compared
to pre galvanized material. Hot-dipped galvanizing is not recommended
for threaded products, considering the zinc coating thickness will often
disrupt the threads. Superstrut hot-dipped galvanized is in conformance
with ASTM Specifications A-123 (formerly A-386) and A-153. Superstrut
channels maintain a minimum 1.5 ounces of zinc per square foot of steel
or 2.5 mils (ASTM A-123, Thickness Grade 65). This finish is also referred
to as ”hot-dipped galvanized after fabrication.”
SilverGalv
®
(Suffix EG)
Often referred to as “zinc plated” or “electroplated zinc,” the steel and
.5 mils of zinc are bonded by an electrolysis process. This is the identical
process used in the Kindorf Galv-Krom
®
finish without the numerous benefits
of the gold colored trivalent chromium conversion coat (see Galv-Krom
®
finish for more information). Electrogalvanizing is most commonly applied
to small fittings, hardware and threaded products.
PVC Coated (Suffix PVC)
A polyvinyl chloride (PVC) plastic coating is fused to the channel, fitting
or accessory after fabrication by immersing the part in fluidized PVC tanks.
The fused-melt mixed powder PVC coating thickness is 15 mils (.015") plus
or minus five mils. PVC material is a thermoplastic and will soften in high
temperature. An inherent weakness with PVC coatings occurs when field
alterations are applied, such as cutting or drilling. These acts disrupt the
sealed PVC product and warrant field touch-up. Thomas & Betts cannot
be held responsible for field-altered PVC coated products.
Finishes
D-3
Metal Framing, Pipe Hangers and Accessories