Allied Gatorshield spec sheet, ZRC spec sheet and

B117 Salt Spray Test Results

The Allied tube advantage

Allied tube has numerous inherent advantages over hot dipped galvanized products and while your fabrication necessitates some hot dipped components I believe that these advantages make it a viable option to your current method of using black steel and hot dipping.

Reduced cost - I believe that the cost of our galvanized tube over the cost of hot dipping is in itself an advantage that merits consideration. Even on a direct cost comparison this can be significant but when considering reduced shipping and handling costs the savings can be compounded

Custom Products - Allied supplies OEM manufacturers with custom cut and manufactured tube. A simple option such as custom cut lengths can represent additional saving in material and labour. (Dropping as little as 1’ off of a 21’ length of tube can amount to 5% wastage. This combined with the cost of cutting can add immeasurably to your cost of manufacturing. Additionally services such as dedimpled ends can enable you to swage lengths together seamlessly without having to trim end pieces. Not all hot dipped pipe is dedimpled.

Fabrication - The swaging of tube for single arch structures would be much easier and more consistent with Allied tube due to the uniform coating. There would be no fears about swages not fitting properly or too tightly and assembly would be improved.

Reduced cover wear – Allied tube because of its ultra smooth coatings is proven to reduce the wear on and increase the life span of covers on fabric shelters. That is why it is the tube of choice for most fabric manufacturers in North America

Appearance – Allied tube is known for it smooth, shiny appearance. Perhaps more importantly the combination of our coatings ensures the longevity of this appearance over a long period of time. It resists traditional graying down that is common with hot dipped products

Formability - Allied products can be readily bent without compromising the coating of the tube. Hot dipped tube tends to crack with bending and these cracks compromise the coatings performance over time. In addition the consistence of our tube strength ensures more consistent bending properties, piece-by-piece, bundle-by-bundle

High strength – Allied tube is a high strength structural tube that offers 50,000 psi yield. This makes it structurally stronger than commercial hot dipped tubing and many times allows for the use of lighter wall options without compromising strength.

Strength options – with truckload orders we can provide an even higher strength 55,000 Yield and 60,000 tensile tube for only pennies more per foot. This allows you greater flexibility in the spacing of arches and reduces further your frame costs.

Painting options – should you require it, for special applications or to meet the aesthetic needs of higher end buildings, Allied Tube can be readily painted and powder coated. This is not feasible with Hot dipped tube.

Many times the advantages are perceived to be undervalued when the limitations or concerns about using pregalvanized tube are considered. However these concerns can often be overcome. I would like to address your concerns about welding and remetalizing.

Welding issues – Allied tube is among the safest galvanized tubing products in the market to weld. Our lighter coatings reduce significantly the amount of zinc that is expelled from the tube during welding and our pure coatings all but eliminate the potential for lead contamination. In addition the zinc coating on our tube contains only trace amounts of lead (unlike hot dipped products that contain up to .5% lead)

Remetalization - It is true that once welded the zinc coating is removed around the weld area. The low vaporization point of zinc means that this is burnt off. However there are two methods that are commonly used to remetalize these components and areas. They include a cold galvanizing compound (ZRC or similar product) that can be a more than acceptable color match to our tube and is recognized as equivalent to hot dipping by underwriter’s laboratories.

Clear Organic Coating (Qwick-Coat®)

Conversion Coating

Uniform Galvanized Zinc Coating

High-Strength Cold-Formed Steel

90% Zinc Organic Interior Coating

800-882-5543

GATORSHIELD® ADVANTAGES

• Unsurpassed Corrosion Protection - Gatorshield® is moreresistant to rust than any competitive tube product. The Flo-Coat®

process makes the difference!

• Strength - Minimum 50,000* psi yield strength and 55,000* psitensile strength provide the ultimate in structural integrity

• Weld Friendliness - Due to its 99.99% pure zinc coating;Gatorshield® can be easily and safely welded.

• Ease of Fabrication - Gatorshield® is capable of extremefabrication without cracking, flaking or otherwise damagingthe coatings.

• Appearance - The clear organic topcoat that seals in theprotection produces a smooth shiny appearance.

* Applicable to products 15 gauge and heavier

©2017 Atkore International, Inc. All rights reserved. ATCM-L-4021-1705

GATORSHIELD®

LAYERS OF PROTECTION

Gatorshield® steel tubing is the standard of excellence and product

of choice for fabric covered structures. One of the most critical

components of a fabric covered shelter is the structural framework.

No other tube on the market can offer the strength, corrosion

protection and formability of Gatorshield®. Our tube meets the yield,

tensile, elongation and wall thickness requirements for ASTM A500

Grade C structural tubing which meet the engineering requirements

of the A660 Canadian Building Code for fabric covered structures.

Contact us for your next project at 800-882-5543 or visit atc-mechanical.com for

your local sales representative.

TUBING GATORSHIELD®

GATORSHIELD®PRE-GALVANIZED /

GALVALUMEHOT-DIP GALVANIZED (HDG)

RAW/BLACK PAINTED TUBE

Fabrication

The composition and controlled thickness of Gatorshield® allows the tube to undergo severe fabrication without flaking the zinc coating

Manufacturing process can cause small blisters which can result in surface defects in powder coating and flake in fabrication. Top coating, if offered, is also subject to cracking during fabrication.

The inherent alloy compositions and configurations of HDG make it hard and brittle. Severe fractures can occur during fabrication and can cause the zinc coating to flake

Can be readily fabricated

AppearanceSmooth, shiny coating that will prevent premature tarp wear

Poor coating coverage can lead to dull or inferior aesthetic appearance. If supplied as galvalume aluminum, very visibly inherent issue as it transfers to the often white cover as black rub marks.

The surface of HDG has a “frost-flower” or “spangled” pattern. It quickly oxidizes or “grays down” and white rust rapidly forms. Rough surface increases tarp wear.

Appearance can be very good initially, but any exposed surface damage will cause rapid rust formation

Corrosion Protection

Superior triple coating protection covering 100% on the inside (ID) and outside diameter (OD)

Does not offer full coverage due to bare ID weld seam and varying metalizing process. Only two layers of protection on the OD.

Good anode cathode corrosion protection that is dependent on coating thickness and uniformity.

Paint inhibits corrosion on OD but not the ID. The coating leaves the inside exposed to premature rust. Outside rusts rapidly when damaged.

PaintabilityThe clear top coat makes it easy to paint with minimal cleaning

Requires special surface treatment before the application of paints or powder coatings; otherwise, proper adhesion is not obtained

Cannot be readily paintedwithout etching

Must be cleaned to SP1 (sand-blasted) to be properly coated. Lack of proper preparation reduces lifespan

Strength

Minimum 50,000* psi yield strength and 55,000* psi tensile strength provide the ultimate in structural integrity

Offers only "target" yield and tensile strength, traditionally not A 500 C

Variable strength parametersdepending on steel used,yield strengths can range from36,000 to 50,000 psi

Strength parameters vary because most available commercial tube is non-structural

*Applicable to products 15 gauge and heavier

www.atc-mechanical.com

GATORSHIELD OUTPERFORMS ITS COMPETITORS IN MULTIPLE CATEGORIES

No other product on the market can match our Gatorshield® superior strength, reduced weight, advanced corrosion protection and formability. Accept no substitute!

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ONE What is Gatorshield®...andWhy is it Gator Tough?

TWO What Else Should I KnowAbout Gatorshield®?

• It’s available in round, square and rectangularshapes…in a 1/2" to 5" O.D. size range…in a .028to .250 wall thickness (gauge) range.

• It delivers to all end-users a smooth, shiny appear-ance.

• It can be easily fabricated…with no deformation orflaking of the base material.

• It can be produced in whatever length is needed tomeet your specific requirements.

• It can be manufactured at these convenient produc-tion facilities…Harvey, IL (Chicago), Philadelphia,PA. and Phoenix, AZ.

Gatorshield is our patented triple layer Flo-Coat® rustand corrosion resistant product protection which hasshown itself to be the best over the long haul versus all competitive product offerings. When rust and corrosion protection is needed…Gatorshield is Gator Tough.

In addition, our zinc interior coating provides theinside of the tube with maximum corrosion and rustprotection. Inside and out…Gatorshield is the best…and has been the best productchoice for over 30 years.

Allied Mechanical Tube Division is the world'sleading producer of galvanized electric resistancewelded steel tubing. Gatorshield coated steel tub-ing is considered the standard of excellence inmany industrial end-use applications.

Even Greater

Rust &Corrosion

Protection

Gatorshield is available in a wide variety of yield andtensile strengths.

Commonly requested are 15 gauge (.072 wall thick-ness) and heavier, 1.000" to 5.000" O.D., for highstrength and super strength structural steel tube appli-cations which require specific mechanical properties.

Some typicalproperties askedfor in the O.D.and Gauge com-binationsdescribed aboveinclude:(see followingpage)

FIVE How Does the Gatorshield®

Coated Tube Perform in Terms ofFabrication Properties VersusCompetitive Product Offerings?

THREE How Does Gatorshield®

Compare With the Competition in Termsof Rust and Corrosion Protection?

* Conducted in accordance with ASTM-B-117 standards. All tests conducted by ScientificLaboratories, Inc., Chicago, IL.** Gatorshield triple coat protection is used exclusively for all 50/55®, 60/75® and RS-20/RS-40Recreational/Structural Steel Tubes.

FOUR What About StrengthOptions Available With the Gatorshield®

Triple Coat of Protection?

Let’s compare:

Flaking/ChippingProduct During Bending

OperationsNo Flaking/

Gatorshield® Chipping WhenFabricated

Hot DippedSchedule 40 Flakes When

Pipe Fabricated

Pregalvanized Flakes WhenTube Fabricated

WeldProduct Integrity

PropertiesGatorshield® Excellent*

Hot DippedSchedule 40 Fair

Pipe

Pregalvanized FairTube

Product AppearanceCharacteristics

Gatorshield® Bright & Shiny

Hot Dipped

Schedule 40 Rough & DullPipe Surface

Pregalvanized Dull GrayTube Surface

* The weld & weld area are asstrong as the tube itself.

High Strength 50/55® = 50,000 Minimum PSI Yield /55,000 Minimum PSI Tensile

Super Strength 65™ = 65,000 Minimum PSI Yield /70,000 Minimum PSI Tensile

60/75® = 60,000 Minimum PSI Yield / 75,000Minimum PSI Tensile

Call us…we have the strength properties you need tomeet your specific high strength applications.

FOUR (cont’d)

192 Pregalvanized G-60

480 Pregalvanized G-90

576 Pregalvanized G-115

576 Galvanized Schedule 40 Pipe

744 Competitive Triple-Coat Product

840 Allied Zinc Flo-Coat®

1848 Allied Gatorshield (square)

2016 Allied Gatorshield (round)

Salt Spray Tests - Galvanized Products(First Sign of Red Rust-No. of Hours)

SIX What About Painting ofPowder Coating Over Gatorshield®

Triple Coat Finish?

It’s easy to paint or powder coat over our galvanizedsteel tubing.

Simple surface cleaning of the tube is required due tonormal transportation and storage related accumulatedsoils. Merely wipe off such soils with a mild cleaningsolution.

Our galvanized steel tube coatings will also withstandin-line chemical cleaning baths and rinses. At the sametime, our coatings will not damage or contaminate anypart of your cleaning system.

Allied's galvanized tube products are protected by aclear, organic top coating which provides excellent ad-hesion properties to most thermo-set powder coatings,as well as to the following air dry and bake topcoats:

• High bake thermoset acrylic• High bake alkyd• High bake polyester• Two-part urethane or epoxy• Solvent-based paints for metals• Solvent-based paints for wood• Solvent-based high-solids paints• Oil-based paints• Paints for car bodies or appliances

As you can see, almost all powder or liquid paints willwork well over our clear topcoat. If the paint/powdercoating you are using does not fall into one of the above categories, or you have any questions,please contact Allied's Mechanical Tube Division for more specific information.

SEVEN What About WeldingGatorshield®?

Gatorshield’s zinc coated finish welds quickly and eas-ily under normal working conditions and utilizing pre-scribed welding procedures. Allied’s galvanizingprocess utilizes a 99.99% pure zinc alloy with signifi-cantly less harmful lead content than generallyencountered with pregalvanized tube and hot-dippedSchedule 40 products. This means that the lead oxidefumes generated duringwelding are kept to anabsolute minimum.

When weldingany galvanizedtubing, it isimportant to restorethe corrosion resistanceof the weld zone to that ofthe surrounding tube area.This is easily accomplishedby using Allied's customtouch-up paint, which hasbeen specifically developedfor this purpose, and is available directly from Allied.

If you would like morein-depth information onwelding galvanized steeltubing, or the variousmethods of restoringcorrosion resistance toweld areas, pleasecontact your salesrepresentative fora copy of Allied'sWelding & PaintingGuidelines.

• Base Metal: The steel strip used in the manufactureof Mechanical tube shall conform to ASTM A-569 for 1008-1010 Carbon Steels. For 1015 through 1022Carbon Steels the steel strip shall conform to ASTMA-568.

• Zinc:The zinc spelterused in the manu-facture of Allied'sMechanical tubeconforms withASTM B-6 HighGrade andSpecial HighGrade Zinc.

• ChemicalComposition:In accordancewith ASTM A-500.

• Materials Testing: In accordance with ASTM-500and ASTM E-8.

NINE What About the Gatorshield®

Steel Tube Product as itRelates to ASTM Standards?

EIGHT What About ThreadingGatorshield®?

On 15 gauge and heavier products, in all popular pipesizes, standard threading procedures apply.

With lighter-gauge tubing, the threading tolerancesmust be proportionately modified. For detailed thread-ing procedures, please see Allied's Galvanized SteelTubing Threading Guidelines. They are available fromyour local sales representative, or call the MechanicalTube Division at (800) 882-5543.

Allied's 50/55® significantly outperforms galvanizedSchedule 40 pipe, gauge for gauge, in every way…andweighs at least 31% less (OD/OD) in popular pipe sizes.

TEN How Does Gatorshield®

Perform Vs. Schedule40 Pipe?

Let’s compare the results of documented tests:

Galvanized Allied’sSchedule 40 50/55 with

Pipe (ASTM-A-53) Gatorshield

35,300 psi pulling force-Pipe begins to yield Unchanged

56,200 psi pulling force-Pipe fractures Unchanged

58,840 psi pulling force-Tube begins to yield

Allied guarantees minimumyield strength of 50,000psi…55,000 tensile strength(fracture point). Yet the testresults show that Allied's50/55® with Gatorshield® yieldpoint was 17% greater than theguaranteed minimum. The gal-vanized Schedule 40 pipe, how-ever, fractured at 56,200 psipulling force.

And when compared with alu-minum pipe, 50/55's superiorstrength characteristics are evenmore dramatic, with an average60% greater load carryingcapacity in tension.

Plus, Gatorshield offers theadded benefits of easier, morereliable welding, increasedstructural rigidity, greater impactresistance and substantiallylower material cost than withaluminum Schedule 40 pipe.

50/55® with Gatorshield®

Pipe Pipe MinimumSize OD Nominal Wall Lbs./ Weight Yield

Inches Inches Wall Range Ft. Savings Tensile50,000

1/2 .840 .072 .066- .591 30.6% psi Yield(.815) .075 55,000

psi Tensile

1.050 .075-3/4 (1.029) .083 .085 .857 32.0%

.075-1 1.315 .083 .085 1.092 35.0%

.075-1-1/4 1.660 .083 .085 1.398 38.5%

.087-1-1/2 1.900 .095 .097 1.831 32.6%

.087-2 2.375 .095 .097 2.313 36.7%

.112-2-1/2 2.875 .120 .122 3.531 39.1%

Galvanized Schedule 40 ASTM-A-53 PipePipe Pipe MinimumSize OD Nominal Lbs./ Yield

Inches Inches Wall Ft. Tensile30,000 psi Yield

1/2 .840 1.09 .851 48,000 psi Yield

3/4 1.050 .113 1.131

1 1.315 .133 1.679

1-1/4 1.660 .140 2.273

1-1/2 1.900 .145 2.718

2 2.375 .154 3.653

2-1/2 2.875 .203 5.793

Weight/Strength Comparison

Specifications

Physical Properties/Tolerances• Outside Diameter: ±0.005 up to 1.500"

±0.010 up to 2.000"±0.015 over 2.000"

• Wall Thickness-10% of nominal, or ± .010” based on end use.

• Length Tolerance: Under 5' ±1/16"5'-15' ±1/8"15'-20' ±1/4"20'-27' ±1/2"

• Straightness-Maximum deviation from flat .010” per foot.

Standard Mechanical Specifications• Outside Diameter-.815 up to and including 2.875

• Wall Thickness-.072” through .250

• Minimum Yield Strength-50,000 PSI

• Minimum Tensile Strength-55,000 PSI

• Minimum Elongation-23% in 2”

*Shorter and longer length tolerance parameters upon request.

Allied's50/55®

GalvanizedSchedule 40(ASTM-A-53)

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05030 METAL FINISHES/09800 SPECIAL COATINGS COLD GALVANIZING COMPOUND

By ZRC Worldwide 145 Enterprise Drive, Marshfield, MA 02050

Tel: 781-319-0400; Fax: 781-319-0404; E-mail: info@zrcworldwide.com Web: www.zrcworldwide.com

PART 1 - GENERAL

1.01 SECTION INCLUDES A. Cold Galvanizing of structural steel members, assemblies and metal fabrications.

1.02 RELATED SECTIONS A. Section 05100 Structural Metal Framing; B. Section 05200 Metal Joists; C. Section 05300 Metal Decking; D. Section 05400 Cold-Formed Metal Framing; E. Section 05500 Metal Fabrications; F. Section 05580 Sheet Metal Fabrications; G. Section 05700 Ornamental Metal; H. Section 05900 Hydraulic Structures;

1.03 REFERENCES A. SPECIFICATION CONFORMANCE DATA Federal Specification DOD-P-21035A (formerly MIL-P-21035) Galvanizing Repair Specification; Federal Specification MIL-P-26915A(USAF Zinc Dust Primer); Federal Specification TT-P-460 (Type I, Zinc Dust); Canadian Government Specification 1-GP-181A (Zinc Coating).

B. REFERENCE STANDARDS 1. American Society for Testing and Materials (ASTM):A 239 Locating the Thinnest Spot in a Zinc (Galvanized) Coating in Iron or Steel Articlesby the Preece Test (Copper Sulfate Dip); A 780 Repair of Damaged Hot-Dip Galvanizing: B 117 Salt Spray (Fog) Testing; D 520 Type III Specification for Zinc Dust (Metallic Zinc Powder); E 376 Measuring Coating Thickness by Magnetic-Field or Eddy Current (electromagnetic) Test Methods. 2. Steel Structures Painting Council (SSPC)

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SSPC-PS 12.00 Guide to Zinc-Rich Coating Systems. SSPC Paint 20 Zinc-Rich Primers, Type II, Organic. SSPC-SP1 Surface Preparation Specification No. 1, Solvent Cleaning. SSPC-5P3 Surface Preparation Specification No. 3, Power Tool Cleaning. SSPC-5P6 Surface Preparation Specification No. 6, Commercial Blast Cleaning. SSPC-SP1O Surface Preparation Specification No. 10, Near White Blast Cleaning.

1.04 DEFINITIONS A. Cold Galvanizing: A method of applying a zinc coating to structural steel members, assemblies and fabrications at ambient temperatures to achieve long-term corrosion protection. B. Cathodic Protection: Reduction or prevention of corrosion of a metal surface by making it a cathode in an electrolytic cell. C. Galvanic Action: When two dissimilar metals come into electrical contact with each other in the presence of an electrolyte, the less noble metal (zinc) will sacrifice itself (corrode) to protect the more noble metal (steel, iron, or aluminum).

1.05 SYSTEM DESCRIPTION A metallic zinc coating, containing 95% zinc in the dried film, that imparts cathodic protection to ferrous and nonferrous metals through it's galvanic action and is recognized by Underwriter's Laboratories, Inc. as an equivalent to commercial hot-dip galvanizing. This coating, in it's dry form, is non-toxic and essentially free of such heavy metals as lead, cadmium, barium, antimony, arsenic, chromium, copper, mercury, molybdenum, selenium, silver and tellurium.

1.06 SUBMITTALS A. Subcontractor shall furnish the architect/engineer with certification that the materials furnished under this specification meet or exceed the requirements herein. B. Subcontractor shall furnish the architect/engineer with certification that surface preparation of the substrate to be coated has been performed satisfactorily, as herein specified.

1.07 DELIVERY, STORAGE AND HANDLING A. PACKING AND SHIPPING: Aerosols (12 oz.), quarts (6 lb.), gallons (24 lb.) or 3.5 gallon (84 lb.) containers of types suitable to prevent leakage of contents. B. ACCEPTANCE AT SITE: Material shall be accepted at site providing no damage deleterious to products' function is visible and applicable material safety data sheets are present.

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C. STORAGE AND PROTECTION: Do not store containers above 104 degrees F. Store containers out of sunlight and away from heat and sparks. Keep containers away from children.

1.08 PROJECT/SITE CONDITIONS A. Drying time of coating is dependent upon temperatures, but product has no application temperature limit. B. Surface temperature of the substrate to be coated shall be at least 50 above the dew point to avoid possible condensation. C. Humidity shall be less than 85% R.H.

PART 2 - PRODUCTS

2.01 MANUFACTURERS ZRC Worldwide, 145 Enterprise Drive, Marshfield, Massachusetts 02050, Tel. 781-319-0400 Fax. 781-319-0404 Toll Free. 1-800-831-3275, Email: info@zrcworldwide.com Product Names: Z.R.C. Galvilite Cold Galvanizing Compound

2.02 MATERIALS A. SPECIFICATIONS: Type -Single pack, premixed, ready to apply, U.L. recognized, liquid organic zinc compound.

Finish - Shiny light gray.

Theoretical coverage -450 square feet per gallon at 1.5 mil dry film thickness.

Metallic zinc content -95% by weight in dry film. Flash point -104 degrees F (SETA method, ASTM D-3278).

Weight per gallon -24 lbs.

Solids content -52% by volume (ASTM D-2832).

VOC content -385 g/l (3.3 lbs/gal) (ASTM D-1475).

Viscosity -1900 cps. - Brookfield spindle #6 at 100 RPM at 25 degrees C (ASTM D-2196).

Maximum service temp. -750 degrees F (ASTM D-2485).

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Specific gravity -2.797 (ASTM D-1963)

Electrical conductivity -73 million ohms per 3 mil dry.(Resistivity).

Impact resistance -Greater than 30 inch lbs. (extrusion per ASTM D-2794).

Abrasion resistance -11.5 liters per dry mil (tested at 3 dry mils per ASTM D-968).

Pot life -At least 24 hours.

Shelf life -Bulk type, 3 years minimum. Aerosol type, l year minimum.

Dry time -(Set to touch) When ambient air dried, 20-30 minutes (ASTM D-1640).

Recoat time -(Second coat) After 12 hrs. Under certain conditions, recoat time can be reduced. Please contact manufacturer for specifics.

B. SUBSTRATE ACCEPTABLE FOR COATING: 1. Substrates shall be of iron, steel or aluminum including structural shapes, pipe, sheet,fabrications and assemblies. 2. Substrates of iron, steel or aluminum may be satisfactorily coated regardless of carbon,phosphorus, manganese or silicon inclusion.

2.03 EQUIPMENT A. Coating shall be applied by brush, roller, low pressure compressor-type spray or airless-type spray. B. Refer to Section 3.03B for specific equipment information.

2.04 MIXES A. Coating herein specified is a one-component, premixed, ready to apply compound. B. Contents of containers shall be stirred well upon opening and during application to ensure homogeneous mix.

PART 3 - EXECUTION

3.01 EXAMINATION A. Iron, steel, or aluminum surfaces to be coated shall be clean; i.e. devoid of grease, oil, mill scale, oxidation, loosely adherent rust, paint, etc. B. Coating shall be applied directly to metal surface to be galvanically active.

3.02 PREPARATION A. Surface preparation is dependent upon substrate condition and intended service.

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B. Typical examples are as follows: Grease and Oils - Solvent clean to SSPC-SP1 Rust scale or easy to remove paint - Power tool clean to SSPC-SP3 Mill scale or firmly adhered paint - Sandblast to SSPC-SP6 (commercial) Water immersion - (100 degrees F maximum) Sandblast to SSPC-SP10(near-white)

3.03 APPLICATION A. GENERAL APPLICATION INFORMATION 1. The coating shall be applied at sufficient wet film thickness to achieve a minimum dryfilm build of 2.5 - 3.5 mils, using manufacturer's recoat time directions. 2. The coating has good brushing properties and is suitable for spray application, when suchapplication is specified. 3. Thinning with appropriate thinners as recommended by the manufacturer is allowedprovided film thickness requirements can be maintained and other properties of the coating remain uncompromised. 4. The coating shall be well stirred before use so that it is completely homogeneous duringapplication. 5. Continuous agitation (by means of an in-pot power mixer) is strongly recommended toensure the continuous application of a completely homogeneous material at all times. 6. Omit coating of surfaces to be welded in the field.7. Material partially used at the end of any day shall be protected from skinning by placingthin blanket of solvent over remaining coating followed by careful closing of containers. Coating may be reused on the following day after total rehomogenization.

B. SPECIFIC APPLICATION INFORMATION 1. APPLICATION BY BRUSH OR ROLLER:Apply as received in container. 2. APPLICATION BY LOW-PRESSURE COMPRESSOR TYPE SPRAY:Atomized air pressure - 50 lbs. Fluid pressure - 15-20 lbs. Orifice of tip – 80/1000ths (.80). Viscosity reduction - 4 parts Coating to 1 part XXX Thinner or 16 parts Coating to 1 part Xylol/Xylene.

3. APPLICATION BY AIRLESS TYPE SPRAY:Pump - 30:1. Hose - 1/2" (I.D.) Airless type. Orifice of tip - 600 - 26/1000 ths. (.026).

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Type of tip - Tungsten carbide, reversing (self-cleaning). Filter screens - Complete removal is recommended. If screens are employed, use no less than 30 mesh. Viscosity - No reduction required. Recommended procedure - Connect hose directly to pump without filter assembly, ensuring a hose length of 50 feet maximum. Use least pressure possible. Start at 1500 lbs. and increase as required for good spraying properties.

C. CLEAN-UP 1. Use XXX Thinner (from ZRC Worldwide) or Xylol/Xylene.

3.04 FIELD QUALITY CONTROL A. Inspect installed galvanized materials, fabrications and assemblies for coating thickness in accordance with ASTM E-376.

3.05 ADJUSTING A. After erection, on all uncoated areas, prepare and apply coating per Section 3.03 above. B. Touch-up any areas where shop coat has been damaged in accordance with ASTM A-780.

3.06 PROTECTION A. Only if desired, after 24-48 hours, cold galvanizing coating can be top-coated with acrylic, chlorinated rubber, epoxy, urethane or vinyl type products. B. DO NOT TOP-COAT with alkyd or lacquer type products.

PART 4 - MEASUREMENT

4.01 MEASUREMENT A. Measurement for METAL FINISHES will be made on a contract lump sum basis including surface preparation, application of coating specified and the installation and removal of all items of public health and environmental protection required.

ASTM B117 Accelerated Salt Spray Test

The left truss member is Allied Gatorshield. The right is a hot dipped truss. Both were placed in an excelerated salt spray test. As you can see both are showing white and red rust on the exterior. However the interior of the Allied product in virtually in pristine condition (even at the weld location). Hot dip structures require drain holes to drain the zinc out and is susceptible to moisture and corrosive dust and gases to settle in the pipe causing it to rust unseen from the inside out. The Allied Gatorshield pipe does not require drain holes and is therefore a closed pipe not allowing moisture, gases and dust on the inside.

Allied Gatorsheild on the left // Hot dip on the right A CLOSER LOOK

Please note the concerned interior weld location on the Allied product. Showing little to no compromise to the structure.

Also here are pictures of a hot dipped structure that recently collapsed due to rusting from the inside out. The structure manufacturer told the customer the building collapsed due to the ammonia gases in the cow manure and humidity issues.