Finishes

Zinc CoatingsZinc protects steel in two ways. First itprotects the steel as a coating, andsecond acts as a sacrificial anode to repairbare areas such as cut edges, scratches,and gouges. The corrosion protection ofzinc is directly related to its thickness andthe environment. This means a .2 milcoating will last twice as long as a .1 milcoating in the same environment.

Galvanizing also protects cut and drilled edges.

Electrogalvanized ZincElectrogalvanized Zinc (also known as zincplated or electroplated) is the process bywhich a coating of zinc is deposited onthe steel by electrolysis from a bath ofzinc salts.

A rating of SC3, our standard, provides aminimum zinc coating thickness of .5 mils(excluding hardware, which is SC1 = .2mils).

When exposed to air and moisture, zincforms a tough, adherent, protective filmconsisting of a mixture of zinc oxides,hydroxides, and carbonates. This film isa barrier coating which helps slowsubsequent corrosive attack on the zinc.This coating is usually recommended forindoor use in relatively dry areas, as itprovides ninety-six hours protection insalt spray testing per ASTM B117.

Chromium / Zinc Chromium / Zinc is a corrosion resistantcomposition, which was developed toprotect fasteners and small bulk items forautomotive use. The coating applicationshave since been extended to larger partsand other markets.

Chromium/Zinc composition is anaqueous coating dispersion containingchromium, proprietary organics, and zincflake.

This finish provides 720 hours protectionin salt spray testing per ASTM B117.

Pre-Galvanized Zinc(Mill galvanized, hot dip mill galvanizedor continuous hot dip galvanized) Pre-galvanized steel is produced by coatingcoils of sheet steel with zinc bycontinuously rolling the material throughmolten zinc at the mills. This is alsoknown as mill galvanized or hot dip millgalvanized. These coils are then slit tosize and fabricated by roll forming, shearing, punching, or forming to produceour pre-galvanized strut products.

The G90 specification calls for a coatingof .90 ounces of zinc per square foot ofsteel. This results in a coating of .45ounces per square foot on each side ofthe sheet. This is important whencomparing this finish to hot dip galvanized after fabrication.

During fabrication, cut edges and weldedareas are not normally zinc coated;however, the zinc near the uncoatedmetal becomes a sacrificial anode toprotect the bare areas after a short periodof time.

Hot Dip Galvanized AfterFabrication (Hot dip galvanized orbatch hot dip galvanized)Hot dip galvanized strut products arefabricated from steel and then completelyimmersed in a bath of molten zinc. Ametallic bond occurs resulting in a zinccoating that completely coats all surfaces,including edges and welds.

Another advantage of this method iscoating thickness. Strut products that arehot dip galvanized after fabrication have aminimum thickness of 1.50 ounces persquare foot on each side, or a total 3.0ounces per square foot of steel,according to ASTM A123.

The zinc thickness is controlled by theamount of time each part is immersed inthe molten zinc bath as well as the speedat which it is removed. The term "doubledipping" refers to parts too large to fit intothe galvanizing kettle and must be dippedone end at a time. It does not refer toextra coating thickness.

The layer of zinc which bonds to steelprovides a dual protection againstcorrosion. It protects first as an overallbarrier coating. If this coating happensto be scratched or gouged, zinc'ssecondary defense is called upon toprotect the steel by galvanic action.

Hot-Dip Galvanized After Fabrication isrecommended for prolonged outdoorexposure and will usually protect steel for20 years or more in most atmosphericenvironments and in many industrialenvironments. For best results, a zincrich paint (available from Eaton’s B-LineDivision) should be applied to field cuts.The zinc rich paint will provide immediateprotection for these areas and eliminatethe short time period for galvanic actionto “heal” the damaged coating.

Anticipated Life of Zinc Coatings In Various Atmospheric Environments

Hot Dip Galvanized

Pre-Galvanized

= Zinc Coating 1.50 Oz./Ft.2 (.0026” Thick)

= Zinc Coating 0.45 Oz./Ft.2 (.00075” Thick)

Rural TropicalMarine

TemperatureMarine

HighlyIndustrial

Lifein

Years

Suburban

Environment

Urban

10

20

30

40

10

36

8

29

7

25

6

21

5

18

3

11

Zn

FeZnFe

ZnO

Technical Data

Technical Data

7B-Line series strut systems Eaton

DURA GREEN™ and DURA-COPPER™ Epoxy CoatingsDURA GREEN and DURA-COPPER epoxycoatings are water borne epoxy coatingsapplied to B-Line series products by a precisely controlled cathodic electro-deposition process. This process is accomplished using a conveyor totransport channel and fittings through several cleaning, phosphatizing and application stages prior to being baked(See diagram below).

This custom-designed paint system isused for painting all channels, channelcombinations, slotted angle, and fittings.

Samples are selected on a routine basisfor salt spray (fog) testing to verify the quality of the finish. These tests areperformed in accordance with ASTM B117and evaluated and related according toASTM D1654 (Tables 1 & 2).

The DURA GREEN and DURA-COPPERepoxy coatings have been tested andlisted by Underwriters Laboratories in

accordance with “Standard for SurfaceMetal Raceway and Fittings, UL5” and“Standard for Pipe Hanger Equipment forFire Protection Service, UL203”.

Due to DURA GREEN’s organically basedcomposition, it seats itself into poroussurfaces more completely and efficientlythan zinc coatings. As these porous caverns are filled along the material profile,the outer finished surface demonstrates anincreased smooth uniform plane whichproduces considerably less off-gasing whentested.

DURA GREEN channel meets or exceeds100 level clean room standards. This wasconfirmed by testing the channel inaccordance with Boeing (PCL) Standards,which are more stringent and completethan ASTM E595-93. DURA GREEN wasfound to be a superior finish, due in part toits proven application process.

Unscribed Scribed 1/8” (3.2) CreepageType of Finish 5% Failure (1) from Scribe (1)

DURA GREEN Epoxy 1000 Hours 312 Hours

Mill Galv. (Pre-Galv.) G90 192 Hours 288 Hours

Perma-Green 438 Hours 231 Hours

Zinc Chromate 36 Hours 96 Hours

Industry Green (Range) 10 to 36 Hours 4 to 30 Hours

Salt Spray Test Results

DURA GREEN / DURA-COPPER Epoxy Coating Process

Tank 1 Tank 2 Tank 3 Tank 4 Tank 5 Tank 6 Tank 7 Tank 8 Bake OvenThe channel A rinse is A phosphatized The material A pre-deionized The electro- The first The final rinse The curingand parts are applied to sealer is applied moves through rinse prepares coating tank post rinse insures a process takes 20thoroughly remove to insure clear water rinse the metal for the applies a removes any smooth, minutes at acleaned and insoluble salts corrosion to remove excess cathodic electro- uniform coat unelectrically nonblemish baking temperaturephosphatized. and unreacted resistance and phosphates. coating. of epoxy paint attracted surface. of 375° F (199° C).

phosphates. paint adhesion. to the entire solids.surface.

(1) All salt spray (fog) tests conducted in accordance with ASTM B117 and evaluated andrated according to ASTM D1654 Tables 1 & 2. Tests are performed and certified by anindependent testing laboratory.

Tech

nica

l Dat

aTechnical Data

B-Line series strut systems8Eaton

Continuous slot concrete inserts are designed to provide a pre-set support system cast in concrete ceilings, walls, andfloors to allow flexibility of attachment at any point along the channel. This provides an excellent support system for pipe,conduit, and cable trays.

Continuous concrete inserts, manufactured from our standard channels, have formed anchors spaced on 4 inch (101.6 mm)centers. The 3/16” (4.8 mm) nail-holes are provided for securing the inserts to the forms.

Available in lengths from 3 inches (7.62 cm) to 240 inches (609.6 cm), concrete inserts are shipped complete with end capsand styrofoam filler strips which prevent seepage of concrete into the insert. Styrofoam is easily removed by pulling theconvenient pull-tab.

Materials & Finishes*

*Unless otherwise noted.

Spot InsertsSpot inserts provide for economical single attachment points with full flexibility of fastener sizing, but with limitedadjustment. These products are made from steel strips in accordance with ASTM A1011, 33,000 PSI min. yield.Standard finish is electro-plated zinc (ASTM B633).

Special Concrete InsertsPre-stressed inserts, inserts with studs welded to the back of the channel, and other types of special inserts areavailable.

Test DataIndependent Testing Laboratory test data available upon request.

MetricMetric dimensions are shown in parentheses. Unless noted, all metric dimensions are in millimeters.

Concrete Inserts

FinishCode Finish Specification

PLN Plain ASTM A101133,000 PSI min. yield

GRN DURA GREEN™

ZN Electro-Plated Zinc ASTM B633 SC1 Type IIIGALV Pre-Galvanized ASTM A653

33,000 PSI min. yieldHDG Hot-Dipped Galvanized ASTM A123SS4 Stainless Steel Type 304 ASTM A240SS6 Stainless Steel Type 316 ASTM A240

Continuous Concrete Inserts

254 B-Line series strut systemsEaton

Length Wt./C Design LoadPart No. in. mm Lbs. kg Lbs. kN

B22-I-3 3” (76) 72 (32.6) 500 (2.22)

B22-I-4 4” (101) 88 (39.9) 800 (3.56)

B22-I-6 6” (152) 120 (54.4) 1000 (4.45)

B22-I-8 8” (203) 152 (68.9) 1200 (5.34)

Length Wt./CPart No. in. mm Lbs. kg

B22-I-12 12” (305) 224 (101.6)

B22-I-16 16” (406) 289 (131.1)

B22-I-20 20” (508) 353 (160.1)

B22-I-24 24” (609) 420 (190.5)

B22-I-32 32” (813) 553 (250.8)

B22-I-36 36” (914) 620 (281.2)

B22-I-40 40” (1016) 686 (311.1)

B22-I-48 48” (1219) 820 (371.9)

B22-I-60 60” (1524) 1018 (461.7)

B22-I-72 72” (1829) 1218 (552.5)

B22-I-84 84” (2133) 1417 (642.7)

B22-I-96 96” (2438) 1616 (733.0)

B22-I-108 108” (2743) 1816 (823.7)

B22-I-120 120” (3048) 2016 (914.4)

B22-I-144 144” (3657) 2416 (1095.9)

B22-I-168 168” (4267) 2816 (1277.3)

B22-I-192 192” (4877) 3216 (1458.7)

B22-I-216 216” (5486) 3616 (1640.2)

B22-I-240 240” (6096) 4016 (1821.6)

B22IContinuous Concrete Insert• Design Load for B22-I-12 thru B22-I-240

is 2,000 lbs. (8.89 kN) per foot of concrete insert length with safety factor of 3 in3000 psi concrete.

• Loads concentrated within the last 2 inches (50.8 mm) of concrete inserts8” (203.2 mm) and longer should not exceed 1,000 lbs. (4.45kN).

• Concrete insert should be secured to the forms on 16” (406.4 mm) to 24” (609.6 mm)intervals.

• B22-I continuous concrete inserts are made from B22 channel. Use channel nuts designed for use in B22 channel.

• B22-I concrete inserts are supplied withstyrofoam fillers. B3322 end caps are furnished with inserts through 8” (203.2 mm)long, and B205 end caps are furnished with inserts 12” (304.8 mm) and longer.

• Material: Plain Steel ASTM A101133,000 PSI min. yield or Pre-Galvanized Steel ASTM A653SS 33,000 PSI min. yield.

• Finish: Plain, DURA GREEN™, Pre-Galv,HDG

15/8” (41.3)

15/8” (41.3)

25/8” (66.7)

B3322 End Cap

StyrofoamFiller

.188 Knockouts ForNailing Inserts To

Forms

3/4” (19.0)

15/8” (41.3)

11/16” (17.4)

4” (101.6)

11/2” (38.1)

31/8” (79.4)

B205 End Cap

StyrofoamFiller

Co

ncr

ete

Inse

rts

MATERIAL: 12 Gauge (2.6)

B22-I-3 ThruB22-I-8

B22-I-12 THRU B22-I-240

15/8” (41.3)

Reference page 254 for general fitting and standard finish specifications

Continuous Concrete Inserts

256 B-Line series strut systemsEaton