IPG Structural Steelwork Paint Systems.pdf

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High Performance & Intumescent CoatingsStructural Steelwork

Middle East


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For further guidance please contact Nick Crowther; +971 (0) 50 625 7464 / [email protected]

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For further advice contact:

Nick CrowtherBusiness Development Manager (Middle East)(Off ice) +971 (0) 4 347 2491 (Mobile) +971 (0) 50 625 7464e-mail: [email protected]

Nick Sandy

Technical Manager (Middle East)(Off ice) +971 (0) 4 347 2491 (Mobile) +971 (0) 50 656 1325e-mail: [email protected]

Product Data Sheets and Safety Data Sheets can be accessed via:www.international-pc.com


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Index

Pages1. Guidance Notes 3-16

1.1 Introduction 3

1.2 Environmental 41.3 Product Fingerprinting 51.4 Paint Systems for Specific Locations 6-111.5 Epoxy Intumescent 121.6 Product Certification for Passive Fire Protection 131.7 Infrastructure Track Record 14-15

2. Ant icipated Life to First Maintenance Period 16-18

3. General Requirements for Protect ive Coating Work 19-21

4. Protect ive Coating System(s) - Select as Required 22-34(See Guidance Notes)

4.1 638(A) Internal non exposed steelwork 224.2 638(B) Internal non exposed steelwork 234.3 640(A) External exposed steelwork 244.4 640(B) External exposed steelwork 254.5 638(C) Internal exposed steelwork 264.6 638(D) Internal exposed steelwork 274.7 638(E) Steelwork to be built into cavities 28

4.8 638(F) Steelwork partially or fully immersed in water 29or ongoing damp/wet environment

4.9 630(A) Galvanised steelwork 304.10 110(A) /150(A) Steelwork fire protected for 30, 60 or 90 min 314.11 110(B) / 150(B) Steelwork fire protected for up to 120 min 324.12 110(C) / 150(C) Steelwork fire protected for up to 120 min 334.13 110(D) Steelwork fire protected for up to 120 min

(on-site, castings) 34

5. Intumescent Finish Requirements 35

6. General Requirements 36-37

7. Preparation for Painting and Paint Application 38-41


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1. GUIDANCE NOTES (Not to go out with speci fied paint system(s))

1.1 The following guidance notes are designed to assist an engineer or architect inselecting an appropriate paint system(s) that will protect the client's investment againstcorrosion, and where necessary provide an architectural finish.

Each project has different requirements depending on location, exposure etc. Alwayscontact International Paint (Gulf) LLC to confirm suitability of a chosen system(s) for agiven structure. (See below for appropriate contacts). Prior to contacting InternationalPaint (Gulf) LLC read the supporting Guidance Notes provided along with theAnticipated Life to First Maintenance notes. Engineer is advised to liaise with thearchitect/client to establish finish/maintenance requirements.

Where requirements fall outside the standard specifications provided within theseGuidance Notes, contact International Paint (Gulf) LLC to discuss and agree anappropriate coating system(s). Points of contact:-

Nick CrowtherBusiness Development Manager (Middle East)(Off ice) +971 (0) 4 347 2491 (Mobile) +971 (0) 50 625 7464e-mail: [email protected]

Nick SandyTechnical Manager (Middle East)(Off ice) +971 (0) 4 347 2491 (Mobile) +971 (0) 50 656 1325e-mail: [email protected]

When selecting a paint system to protect the client's investment against corrosion aSpecifier is also making a commercial decision regards the cost and related quality ofcorrosion protection. The majority of a paint budget for a given project is taken up at

works in blasting the steel to Sa2.5 (ISO 8501-1: 1988), and labour costs forapplication. These are constant cost factors regardless of what paint system isadopted. It is therefore in the client's interest to have a paint system that will provide amaximised life to first major maintenance with a minimal amount of incurredmaintenance.


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1.2 Environmental

1.2.1 Sustainability Index

The coating supplier must demonstrate a commitment to the environment and confirm

its credentials as a sustainable supplier by independent reports such as the DowJones Sustainability Index. AkzoNobel has been listed within the index for the pastfours years and topped the index in 2007.

1.2.2 Lead in Zincs

Lead is a natural occurring component of zinc based coatings. Within zinc basedcoatings there are varying degrees of lead content which will depend upon the type oflead used. All of our zinc based coatings are formulated with Type II lead as per ASTMD520. All zinc coatings must comply with ASTM D520 Type II for lead content.

1.2.3 VOC (Volatile Organic Compound)

Each product listed has a VOC Grams per litre listed as measured by UK PG 6.


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1.3 Product Fingerprinting

International Paint employs a global product range that is centrally managed ensuringconsistency of quality, regardless of the geographical location. We recognise thatproduct quality must be consistent at every supply point. To this end International

Paint complies with the principles outlined in ISO 20340 for product fingerprinting andauthentication. By adopting product authentication protocol specifiers can be assuredof product consistency world-wide.


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1.4 Paint Systems for Specific Locations

The aim of this section is to provide the engineer or architect with some guidance re thetype of system that should be adopted for a given location.

The features and benefits are given for each system with a confirmed paint systemappearing under the Protective Coatings Systems section pages

Note: G10 INSPECTION - On all steel structures where International Paint have beenspecified and supply the coatings, International Paint will provide an inspection serviceas per the attached G10 535 Inspection clause. Whilst the onus is on thefabricator/applicator to alert International Paint, 7 days prior to start of applicationprogramme it is always helpful if the project engineer can alert International Paint, viaNick Crowther, at the earliest opportunity that inspection back up is required enablingthe International Paint Technical Services Dept. to liaise and make necessaryarrangements with the fabricator/applicator.

Note: G10 735 TREATMENT OF SITE WELDED JOINTS IN PAINTED STEELWORK- Traditionally site welded joints would be prepared prior to painting by removing allscale and weld splatter by grinding or chipping, abrade to remove all traces of rust, andwash down with clean water. The quality of the surface preparation has a direct bearingon the durability of the applied primer. The integrity of a high performance system canbe adversely affected if applied over an inadequately prepared surface. To avoid thissituation arising we would always recommend vacuum blasting the welds to Sa2.5.


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638 SHOP PRIMING (NO SITE COAT APPLICATION)

1. 638(A) - All internal non exposed steelwork, including steelwork that is partiallyembedded in concrete. If majority of steel structure is internal non exposed in anonshore location this system should be given firs t preference. See notes belowre use of System 638(B).

1 coat Intergard 251 - Fast curing epoxy zinc phosphate.Nominal d.f.t. 75 m

Intergard 251 is a versatile spray applied primer that is hard dry within 2 hours asagainst 24 hours using a standard epoxy or alkyd. The rapid drying properties ofIntergard 251 mean that minimum disruption is caused to the fabrication programmewhich can provide a considerable cost saving. The amount of handling damagerequiring site touch up is also greatly reduced compared to other standard ProtectiveFinishes. Touching up at site is not only costly but never as satisfactory as applying auniform thickness at works for long term protection.

638(B) - All internal non exposed steelwork, includ ing steelwork that is partially embeddedin concrete when specified in conjunct ion with system(s) 640 (A) and/or 640 (B)

1 coat Interzinc 52 - Epoxy zinc richNominal d.f.t. 75 m

Epoxy zinc rich provides excellent long term anti-corrosive protection. AlthoughIntergard 251 will provide adequate protection, Interzinc 52 could be specified forstructures where there is a high element of exposed steelwork that has been specifiedwith system(s) 640 (A) and/or 640 (B). By specifying the same base primer for all of thesteelwork this can help to facilitate the painting programme as it avoids having to usetwo different anti corrosive primers for the same structure.

Note of caution: For structures in a marine coastal location allowance must be made forany possible delay re the construction programme. If the structural shell is likely to beleft exposed for more than two months before being covered then the Interzinc 52epoxy zinc rich should be specified to avoid any possible premature breakdown of theanti corrosive primer.


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640 SHOP PAINTING WITH (COMPLETE SYSTEM SHOP APPLIED)

3. 640(A) - All external steelwork, including semi exposed areas up to and includinga C4 Environment as per ISO 12944 Classi fication.

1 coat Interzinc 52- Epoxy Zinc Rich

Minimum d.f.t. 80

1 coat Intergard 475HS - Epoxy MIOMinimumd.f.t. 100 m

1 coat Interfine 979 - Acrylic polysiloxaneMinimumd.f.t. 100 m

The Interfine 979 acrylic polysiloxane, which is free of isocyanate should be specifiedas a complete system applied at works to include recommended corrosion protectionprimer and intermediate coats.

This system should be specified for external exposed steelwork where the clientrequires enhanced corrosion protection combined with a high architectural/cosmeticappearance, where access for future maintenance will be difficult and of a high cost.Typical structures being: Stadia, airports, atrium steelwork within shopping centres,swimming pools along with any other high profile structures.

Note: Interfine 979 is a gloss finish available in a wide range of shades. Being acrylicmodified Interfine 979 has superior weathering properties compared to first generationepoxy modified polysiloxanes.

For steelwork that is accessible to the public the architect/client should be made awareof the excellent anti-graffiti properties of Interfine 979.

Swimming pool steelwork

System 640(A) would be suitable for internal exposed steelwork within a swimming poolarea where long term corrosion protection combined with a high architecturalappearance is required.

Interfine 979 will retain its gloss/cosmetic properties by a factor of 3 to 4 times longerthan standard polyurethane i.e. typically 15 to 20 years using Interfine 979 as against 3to 8 years using polyurethane. This enhanced durability/cosmetic retention can be ofsignificant interest to the Client who wants to avoid expense of applying a traditionalsite coat system and is looking to minimise any ongoing maintenance.


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4. 640(B) - All external exposed steelwork, including semi exposed areas.C5 Environment as per ISO 12944 Classif ication.

1 coat Interzinc 52 - Epoxy zinc richNominald.f.t. 75 m

1 coat Intergard 475HS - Epoxy mioNominal d.f.t. 150 m

1 coat Interfine 979 - Acrylic polysiloxaneNominald.f.t. 100 m

Where the Client is requiring a Life to First Major Maintenance of 20 years in a C5Environment as per ISO 12944 Classification i.e. Marine estuaries, coastal areas withhigh salinity then an epoxy zinc rich primer needs to be applied with an additional workscoat of epoxy mio prior to the application of the Interfine 979 acrylic polysiloxane.

5. 638(C) - All internal exposed steelwork

1 coat Intergard 251 Fast drying epoxy zinc phosphate / mioNominal d.f.t. 75 m

1 coat Interfine 979 - Acrylic polysiloxaneNominal d.f.t. 100 m

This system would be suitable for high profile architectural steelwork where the clientwants the complete system applied offsite to avoid incurred costs of traditional site coatsystem, and as with external exposed steelwork access for future maintenance will bedifficult and of a high cost.

6. 638(D) - All internal exposed steelwork

1 coat Interseal 670HS - High solids epoxyNominal d.f.t. 100 m

Interseal 670HS is available in a wide range of shades and should be adopted wherethe client does not require a high architectural finish but requires a colour for purposesof identity e.g. a dry industrial environment such as a warehouse, distribution facility orhanger. The key benefit to the client is the cost saving in not having to pay for access,labour and actual time spent in applying a traditional site coat system.


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7. 638(E) - Steelwork to be built into brick or blockwork cavities

1 coat Interseal 670HS - High solids epoxyNominal d.f.t. 175 m

Due to the very high solvent content of bitumen, this product, which traditionally hasbeen adopted for these locations, is environmentally sensitive and has been replacedby our high solids low solvent Interseal 670HS. The purpose of protecting the cavities isto prevent moisture causing any corrosion where access for future maintenance is likelyto be severely restricted. The key benefit of applying the corrosion protection at worksis that the spray application is carried out in a controlled environment ensuring that therequired d.f.t. is achieved. The potential problems of diluting the bitumen with thinnerfor ease of application is avoided

Where the Interzinc 52 epoxy zinc rich is being used as the base primer for rest of thesteelwork substitute the Interseal 670HS with a coat of Interzinc 52 at a nominal d.f.t. of

100 m.

8. 638(F) - Steelwork partially or fully submerged in water, or ongoing damp / wetenvironment

1 coat Interzone 954 - Hydrocarbon epoxyNominal d.f.t. 500 m

Interzone 954 is suitable for splash zone and specialist onshore maintenance and newconstruction application e.g. jetty piling, bridge underdecks, water/waste treatmentenvironments, paper mills or any other location where there is an ongoing damp/wetenvironment.

Available in a range of colours Interzone 954 is an alternative to coal tar epoxy withfewer health and safety restrictions.

The cost benefit of Interzone 954 is that this product can be applied in one coat asagainst the traditional three coat application of an anti corrosive primer plus two coats ofcoal tar epoxy to achieve the same dry film thickness


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630 GALVANISING PLUS PAINT SYSTEM

9. 630(A) - Galvanised steelworkThoroughly clean down, degrease and apply to a clean, dry surface:-

1 coat Interprime 160 - Etch solution1 coat Intergard 251 - EpoxyNominal d.f.t. 75 m

1 coat Interfine 979 - Acrylic polysiloxaneNominal d.f.t. 100

Again Interfine 979 would be suitable for areas where access re future maintenance isgoing to be difficult and of a very high cost where the client wants to minimise ongoingmaintenance.

The above system assumes site application by brush. If application to be done atworks 'sweep blast' the surface instead of using the etch solution.


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1.5 Epoxy Intumescent

M61 Intumescent coating for two hour fire protection of steelwork

150(B) Off site coating

Interchar 212 epoxy intumescent

Typical thickness 4 6mm

Interchar 212 is a solvent free epoxy intumescent that has a zero V.O.C. contentsuitable for application to all structural steel sections that require a two hour fireprotection rating.

Interchar 212 is applied offsite in a works controlled environment. The material can beapplied directly on to a surface prepared to grade Sa 2.5, avoiding the need to apply ananti corrosive primer. If required Interchar 212 can be applied over a range ofapproved International Paint primers.

The offsite application of Interchar 212 reduces the complexity of the construction

process and can assist in reducing the construction schedule. In addition the offsiteapplication allows for more rigorous quality control ensuring that the fire proofing isapplied exactly as per the project specification.

Interchar 212 is suitable for exposure in all environments. This product can be topcoated for architectural purposes either with polyurethane or acrylic polysiloxane in afull range of shades.

Interchar 212 has been independently explosion tested up to 4 bar with no damage tothe material.

110(A) On site installation of cast epoxy intumescent

Interchar 212 epoxy intumescent is available in casting form to provide a two hour fireprotection of circular and rectangular free standing columns where a high architecturalappearance is required.


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1.5 Product Certification for Passive Fire Protection

Voluntary certification of Passive Fire Protection is provided by warringtonfireCertification under the CERTIFIRE brand. CERTIFIRE is independent third party

product certification, a quality mark, designed to enable manufacturers to demonstrate adifference between their products and those satisfying only the minimum requirement tobe placed on the market.The scheme is designed to give confidence to specifiers, enforcement authorities andbuilding owners and occupiers. The International Paint, Interchar range ofIntumescent Fire Protection has full Certifire approval.


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1.6 Infrastructure Track Record


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2. ANTICIPATED LIFE TO FIRST MAJOR MAINTENANCE PERIOD

The ISO 12944 standard is intended to assist engineers and corrosion experts in adopting bestpractice in corrosion protection of structural steel at new construction.

ISO 12944 is progressively superseding regional standards to become a truly global benchmark in

corrosion control.

As defined in ISO 12944, Corrosion Protection of Steel Structures by Protective Paint Systems,the durability of a coating system may be expressed in terms of 3 ranges:-

Low 2 to 5 yearsMedium 5 to 15 yearsHigh More than 15 years

The anticipated level of coating failure before the first major maintenance painting is neededshould be discussed by the interested parties. This would normally be carried out for reasons ofcorrosion protection once the coating has reached the level Ri3 as defined in ISO 4628-3

designation of degree of rusting.

The degree of rusting is judged on a scale from Ri0 in which there is no rusting, to Ri5 where thereis 40-50% rusting.

The degree of rusting is estimated by reference to a series of pictorial standards selected from theInternational Standard ISO 4628/3, Designation of degree of rusting.

Designation Ri3 refers to a coating system where 1% of the surface area has broken down so thatrust has broken through.

It needs to be clearly understood that the durability of a paint system i.e. how long will it last before

requiring a first major maintenance is not a "guarantee time". Durability is a technicalconsideration that can help the owner set up a maintenance programme. A guarantee time is aconsideration that is the legal subject of clauses in the administrative part of the contract. Theguarantee time is usually shorter than the durability range. There are no rules that link the twoperiods of time.

Maintenance of the finish coat is often required at more frequent intervals because of fading,chalking, contamination, wear and tear or simply for aesthetic reasons. By selecting anappropriate finish coat system along with an ongoing inspection programme it is possible toprolong the durability of the finish coat system. It is for this reason that on exposed steelworkwhere a high quality architectural finish is required we now recommend our Interfine 979polysiloxane which will retain its gloss/cosmetic properties by a factor of 3 to 4 times longer than astandard traditional polyurethane.


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The following figures are not warranted, and are strictly for guidance purposes only.

International Paint (Gulf) LLC on request will be pleased to provide an anticipated life to first majormaintenance period for a specific project when provided with confirmed details of the location andoperating environment.

1. 638(A) All internal non exposed steelwork, including steelwork that is partially

embedded in concrete.

1 coat Intergard 251 - fast curing, epoxy zinc phosphateNominal DFT 75 m.

- Anticipated life to first major maintenance: 25 - 30 years

2. 638(B) All internal non exposed steelwork, including steelwork that is partiallyembedded in concrete.

1 coat Interzinc 52 - epoxy zinc richNominal DFT 75 m

- Anticipated life to first major maintenance: In excess of 30 years

3. 640(A) All external exposed steelwork, including semi exposed areas

1 coat Interzinc 52 Epoxy Zinc RichMinimum DFT 80 m

1 coat Intergard 475HS Epoxy MIOMinimum DFT 100 m

1 coat Interfine 979 - Acrylic Polysiloxane

Minimum DFT 100 m

- Anticipated life to first major maintenance: 20 years (up to C4 / ISO 12944)

4. 640(B) All external exposed steelwork, including semi exposed areas

1 coat Interzinc 52 - Epoxy Zinc RichNominalDFT 75 m

1 coat Intergard 475HS - Epoxy MioNominalDFT 150 m

1 coat Interfine 979 - Acrylic PolysiloxaneNominalDFT 100 m

- Anticipated life to first major maintenance 20 years in a C5 Environment as perISO 12944.


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5. 638(C) All internal exposed steelwork

1 coat Intergard 251 - fast curing epoxy zinc phosphateNominal DFT 75 m

1 coat Interfine 979 - acrylic polysiloxaneNominal DFT 100 m

- Anticipated life to first major maintenance: Life of the structure

6. 638(D) All internal exposed steelwork

1 coat Interseal 670 - high solids epoxyNominal DFT 100 m

- Anticipated life to first major maintenance 15-20 years (assuming dryenvironment)

7. 638(E) Steelwork to be built into brick or blockwork cavities

1 coat Interseal 670 - high solids epoxyNominal DFT 175 m

- Anticipated life to first majormaintenance: Life of the structure

If the Interseal 670 is substituted by Interzinc 52 epoxy zinc rich apply at anominal d.f.t. of 100 m.- Anticipated life to first major maintenance: Life of the structure

8. 638(F) Steelwork partially or fully submerged in water, or ongoing damp (wetenvironment)

1 coat Interzone 954 - hydrocarbon epoxyNominal DFT 500 m

- Anticipated life to first major maintenance: Exact location - operatingenvironment required to provide estimated figure.

9. 630(A) Galvanised steelwork plus recommended Interfine 979 polysiloxane system

- Anticipated life to first major maintenance: The thickness of the galvanisingand operating environment will have an impact on the durability re corrosionprotection. In an external exposed environment the life to first majormaintenance re cosmetic appearance for the Interfine 979 polysiloxane will be15-20 years (depending on location) and in excess of 30 years for an internalexposed environment.


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3. GENERAL REQUIREMENTS FOR PROTECTIVE COATING WORK

3.1 G10/501 SAMPLES, MOCKUPS, PROTOTYPES, QUALITY BENCHMARKS AND TESTING:Submit the following information at tender stage:

- Provide technical data including inspection proposals, workmanship and application

methods, touching up proposals, testing data, material properties including genericdescriptions of all products to be used.- Provide details of spray equipment that the Contractor proposes to use for factory

applied finishes including capacities and pressure levels for review.- Provide details of all site applied painting techniques that the Contractor proposes to

use including touching up specifications for review.- A statement of compliance with this Specification.

3.2 G10/510 WORKING PROCEDURES:- Comply with International Paint (Gulf) LLC ' recommended working procedures.

3.3 G10/511 SURFACES NOT REQUIRING COATING:

- Steel sections to be cast into concrete.- Top flange surface of composite beams supporting a concrete flooring system.- Interfaces of members to be site welded.- All faying surfaces for friction grip joints.

3.4 G10/515 OPERATIVES must be appropriately skilled and experienced in the use of specifiedmaterials and methods of application.

3.5 G10/520 COATING MATERIALS:- Wherever possible, to be from one manufacturing batch. Where more than one

batch is to be used, keep separate, allocate to distinct parts or areas of the work,and inform the CA accordingly.

- Check that all coating materials to be used are recommended by International Paint(Gulf) LLC for the particular surface and conditions of exposure, and that they arecompatible with each other.

3.6 G10/523 COMPATIBILITY OF SHOP PRIMER WITH APPLIED INTUMESCENT- Intumescent coating: see clause M61/150 AND 110.- Primer: Specified primer to be compatible with the intumescent under general and

fire conditions.- International Paint (Gulf) LLC recommendations and test evidence. To include: fire

test data to BS 476 parts 20 22.Third party Certifire Approval.

3.7 G10/525 PREPARATION MATERIALS AND ANCILLARIES:Types recommended by International Paint (Gulf) LLC for the surfaces beingprepared. Where there is a requirement for the use of a prefabrication primer applyas recommended by International Paint (Gulf) LLC. Exemption from having to use aprefabrication primer is to be requested at tender stage with given reasons.


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3.8 G10/526 HEALTH AND SAFETY:The Health and Safety data sheets along with Health and Safety Guidance Notessupplied by International Paint (Gulf) LLC should be strictly adhered to. It is theFabricator's responsibility to forward to the Contractor a copy of relevant Health andSafety data sheets supplied by International Paint (Gulf) LLC with writtenconfirmation that the said data sheets have been read, understood and will be

adhered to.

3.9 G10/527 MAINTENANCE PROCEDURE:The maintenance procedure for the outer decorative paint finishes for theinternal/external exposed areas are to be confirmed by International Paint (Gulf)LLC who shall provide the Engineer, on request, a written maintenancespecification to be adopted at the end of the anticipated life expectancy period.

3.10 G10/530 GALVANISING:All cutting, welding and drilling must be completed beforehand. Provide allnecessary vent and drain holes in approved locations and seal to approval aftergalvanising.

3.11 G10/535 INSPECTION:- The nominated steelwork contractor (and site applicator where site coats are to be

applied) will alert the CA and International Paint (Gulf) LLC 7 days prior to start ofapplication programme and permit International Paint (Gulf) LLC to inspect thework in progress, and prepare inspection reports in accordance with their standardconditions of contract. International Paint Ltd will forward a copy of any inspectionreport direct to the CA. Technical support from International Paint (Gulf) LLC doesnot relieve the applicator of his contractual responsibility to ensure that the coatingsare applied in accordance with specification.

- Give CA at least 7 days notice before coated members or components leave theworks.

3.12 G10/540 HANDLING AND STORING COATED STEELWORK:- Use methods and equipment which will minimise chafing, chipping and other

damage to coated components.- Ensure an adequate drying/curing period for each coat before handling.- Use suitable packing, lashings, lifting harnesses, nylon slings, rubber-protected

chains and chocks, etc.- Stack coated components clear of the ground, separated by timber chocks, such

that ponding does not occur.- Where the finished coat is to be shop applied, extreme care and attention should be

taken during transportation and erection to ensure the finished surface remainsundamaged. Allowance should be made for bubble wrap protection or similar duringthis process.


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3.13 G10/545 PROTECTION:- Adequately protect freshly applied surface coatings from damage.- Exhibit 'Wet paint' signs and provide protective barriers where necessary.- Adequately protect surfaces adjacent to those being covered.- Ensure all surfaces to be painted are dry, clean and free of any dirt, oil, grease or

other contamination, including any zinc salts.- Where an epoxy zinc rich primer has been specified the applied primer must have aminimum zinc dust pigment content of 80% by mass of the dry film and comply withrequirements specified by ISO 3549.

3.14 G10/550 REMEDIAL WORK:- Early degradation of coatings by blistering, peeling, flaking, cracking, lack of

adhesion, etc. must be made good by complete removal, preparation andreapplication of the failing coat(s), as instructed and to the satisfaction of the CA.

- Inadequate dry film thickness or surface defects due to inclement weather may,depending on the type of paint, be remedied by rubbing down and applying furthercoat(s), as instructed.

- Any painted areas mechanically damaged in transit or following erection damage tobe hand or power tool cleaned to St2 (ISO 8501-1). Touch up damaged areas withsuitable primer coat to meet original works d.f.t. followed by the specified top coat,where applicable, at a minimum d.f.t. of 50 m. Adhere to International Paint (Gulf)LLC ' recommendation re appropriate method of application.

- If required allow for an overall site coat of Interfine 979 to be applied at a minimumd.f.t. of 75 m to specific 979 - coated steel sections that have been subjected toexcessive transit or erection damage.

3.15 G10/560 CONTROL SAMPLES:For exposed steelwork requiring Interfine 979 acrylic polysiloxane the Contractorshall arrange for two samples of Flat Plate (approx. 500 mm square) or with the

Engineers agreement a suitable piece of steel coated in accordance with thespecification in advance of the main works.

Following approval by the Design Team one sample shall be kept at works andused as a reference to establish required dry film thickness and consistency offinished work during the course of the Works and will be a point of reference requality of finish to be achieved. The second sample shall be retained by the CA.


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4. PROTECTIVE COATING SYSTEM(S) - SELECT AS REQUIRED

(Refer to Guidance Notes before selecting a system(s)

4.1 638(A) Two pack fast curing - epoxy zinc phosphate protective finish

Compliant coating- Use/Location : All internal non exposed steelwork includingsteelwork that is partially embedded in concrete

- Paint Manufacturer : International Paint Ltd- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO

8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Intergard 251- Dry Film Thickness : 75 m nominal- Colour : Red, Buff- Environmental : VOC: 385 gms


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4.2 638(B) Two pack epoxy zinc rich protective finishCompliant coating

- Use/Location : All internal non exposed steelwork includingsteelwork that is partially embedded in concrete

- Paint Manufacturer : International Paint Ltd

- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Interzinc 52- Dry Film Thickness : 75 m nominal- Colour : Grey- Environmental : VOC: 340 g/l


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4.3 640(A) Two pack high solids zinc phosphate, epoxy MIO, acrylic po lysiloxaneCompliant Coating

- Use/Location : External exposed steelwork, including semiexposed areas as required. (Up to and includinga C4 Environment as per ISO 12944

Classification)- Paint Manufacturer : International Paint Ltd- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO

8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Interzinc 52- Dry Film Thickness : 80m minimum- Colour : Red, Sand, Grey- Environmental : VOC:340 g/l

- Shop Intermediate : Intergard 475HS- Dry Film Thickness : 100m minimum- Colour : Red, Sand, Grey

- Environmental : VOC:160 g/l

- Shop Top Coat : Interfine 979- Dry Film Thickness : 100 m minimum- Colour : As required- Environmental : VOC:165 g/l

Refer to International Protective Coatings Interfine 979 Recommended Working Proceduresto be read in conjunction with the Interfine 979 technical data sheet and material safetydata sheet (MSDS). Provided information is to be strictly adhered to. If the steel fabricatordoes not have the capability of applying the complete specified system at works then theyare to subcontract the painting programme to a contractor recommended by International

Protective Coatings.


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4.4 640(B) Two pack high solids zinc rich, epoxy MIO, acrylic polysi loxaneCompliant Coating

- Use/Location : All external exposed steelwork as required (C5Environment as per ISO 12944 Classification)

- Paint Manufacturer : International Paint Ltd- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO8501-1 : 1988). Ensure adequate surface profile

- Shop Primer : Interzinc 52- Dry Film Thickness : 75 m nominal- Colour : Grey- Environmental : VOC:340 g/l

- Shop Undercoat : Intergard 475HS- Dry Film Thickness : 150 m nominal- Colour : Silver, Natural- Environmental : VOC:160 g/l

- Shop Top Coat : Interfine 979- Dry Film Thickness : 100 m nominal- Colour : As required- Environmental : VOC:165 g/l

Epoxy Polysiloxanes are explicitly not approved.

Refer to International Protective Coatings Interfine 979 Recommended Working Proceduresto be read in conjunction with the Interfine 979 technical data sheet and material safetydata sheet (MSDS). Provided information is to be strictly adhered to. If the steel fabricatordoes not have the capability of applying the complete specified system at works then they

are to subcontract the painting programme to a contractor recommended by InternationalProtective Coatings.


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4.5 638(C) Two pack fast cur ing epoxy zinc phosphate, isocyanate free acrylicpolysiloxane compliant coating

- Use/Location : All internal exposed steelwork as required- Paint Manufacturer : International Paint Ltd- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO

8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Intergard 251- Dry Film Thickness : 75 m nominal- Colour : Red, Buff- Environmental : VOC:385 g/l

- Shop Top Coat : Interfine 979- Dry Film Thickness : 100 m nominal- Colour : As required- Environmental : VOC:165 g/l

Refer to International Protective Coatings Interfine 979 Recommended Working Proceduresto be read in conjunction with the Interfine 979 technical data sheet and material safety datasheet (MSDS). Provided information is to be strictly adhered to. If the steel fabricator doesnot have the capability of applying the complete specified system at works then they are tosubcontract the painting programme to a contractor recommended by InternationalProtective Coatings.


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4.6 638(D) High solids pr imer intermediate epoxy coating

- Use/Location : All internal exposed steelwork (for industrialenvironment such as warehouse facility notrequiring high architectural finish)


- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Interseal 670HS- Dry Film Thickness : 100 m nominal- Colour : As required- Environmental : VOC:175 g/l

- Special Requirements : Touch up at site any transit damage withInterseal 670HS to meet original shop d.f.t.


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4.7 638(E) High solids primer-intermediate epoxy coating

- Use/Location : Steelwork to be built into brick or blockworkcavities

- Paint Manufacturer : International Paint Ltd- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO

8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Interseal 670HS- Dry Film Thickness : 175 m nominal- Colour : Red, Grey, Buff- Environmental : VOC:175 g/l

Note: Where Interzinc 52 epoxy zinc rich has been used as the base primer for all thesteelwork substitute Interseal 670HS with Interzinc 52 applied at a nominal d.f.t. of100 m.


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4.8 638(F) Two pack hydrocarbon epoxy compl iant coating

- Use/Location : Steelwork partially or fully immersed in water orongoing damp/wet environment


- Shop Preparation : Blast clean to Preparation Grade Sa2 (ISO8501-1 : 1988). Ensure adequate surface profile- Shop Primer : Interzone 954- Dry Film Thickness : 500 m nominal- Colour : As required- Environmental : VOC:130 g/l


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4.9 630(A) Two pack surface tolerant epoxy, acrylic polys iloxanecompliant coating

- Use/Location : Galvanised steelwork - site coated- Paint Manufacturer : International Paint Ltd

- Surface Preparation : Clean down, degrease and apply InternationalPaint GDA160 - etch solution- Site Primer : Intergard 251- Colour : Grey- Environmental : VOC:385 g/l- Dry Film Thickness : 75 m nominal- Site Top Coat : Interfine 979- Dry Film Thickness : 100 m nominal

- Colour : As required- Environmental : VOC:165 g/l

Refer to International Protective Coatings Interfine 979 Recommended WorkingProcedures, to be read in conjunction with the Interfine 979 technical data sheet andmaterial safety data sheet (MSDS). Provided information is to be strictly adhered to.


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M61 Intumescent coating for fire protection of steelwork

4.10 110(A) / 150(A)

Two pack fast curing epoxy zinc phosphate, Intumescent,Polyurethane top coat

- Use/Location : External and internal exposed steelwork plusinternal non exposed steelwork up to andincluding C4 as per ISO12944

- Shop Preparation : Blast clean to Preparation Grade Sa2(ISO 8501-1 : 1988). Ensure adequatesurface profile

- Manufacturer : International Paint Ltd- Product Reference : Intergard 251- Dry Film Thickness : 75 m nominal- Environmental : VOC:385 g/l

- Intumescent Coat:- Manufacturer : International Paint Ltd- Approvals Required : Certifire

- Product Reference : Interchar 963 for 30 or 60 mins protectionInterchar 973 for 90 mins protection

- Dry Film Thickness : As required for section size- Fire Resistance to BS 476

Parts 20 & 22 : 1987 : 30, 60 or 90 mins (As required)- Finish : As required i.e. 440 Basic Finish, 450

Normal Decorative Finish or 460 HighDecorative Finish

- Environmental : VOC:350 g/l

- Top Sealer Coat:(Optional for internalnon exposed steelwork)- Manufacturer : International Paint- Product Reference : Interthane 990- Dry Film Thickness : 50 m nominal (2x50 m for external exposed)- Colour : As required- Environmental : VOC:390 g/l- Site Touch Up : Repair any intumescent damaged in

transit or during erection in accordancewith International Paint WorkingProcedures

- Special Requirements : Refer to International Paint Working Proceduresre handling, transportation and storage ofsteelwork treated with Interchar offsite.


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4.11 110(B) / 150(B)

Two pack fast curing epoxy zinc phosphate, Waterbased Intumescent,Polyurethane top coat

- Use/Location : External and internal exposed steelwork plusinternal non exposed steelwork up to and

including C4 as per ISO12944- Shop Preparation : Blast clean to Preparation Grade Sa2(ISO 8501-1 : 1988). Ensure adequatesurface profile

- Manufacturer : International Paint Ltd- Product Reference : Intergard 251- Dry Film Thickness : 75 m nominal- Environmental : VOC:385 g/l

- Intumescent Coat:- Manufacturer : International Paint Ltd- Approvals Required : Certifire

- Product Reference : Interchar 1120- Dry Film Thickness : As required for section size- Fire Resistance to BS 476

Parts 20 & 22 : 1987 : 90 or 120 (As required)- Finish : As required i.e. 440 Basic Finish, 450

Normal Decorative Finish or 460 HighDecorative Finish

- Environmental : VOC:0g/l

- Top Sealer Coat:(Optional for internal

non exposed steelwork)- Manufacturer : International Paint- Product Reference : Interthane 990- Dry Film Thickness : 50 m nominal (2x50 m for external exposed)- Colour : As required- Environmental : VOC:390 g/l

- Site Touch Up : Repair any intumescent damaged intransit or during erection in accordancewith International Paint WorkingProcedures

- Special Requirements : Refer to International Paint Working Proceduresre handling, transportation and storage ofsteelwork treated with Interchar 1120 offsite.


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4.12 110(C) / 150(C) Epoxy Intumescent, Acrylic Polysiloxane

- Use/Location : As required- Shop Preparation : Blast clean to Preparation Grade Sa2

(ISO 8501-1 : 1988). Ensure adequatesurface profile- Manufacturer : International Paint

- Approvals Required : Certifire- Product Reference : Intergard 251- Dry Film Thickness : 75 m nominal- VOC : 385 gms per litre

- Intumescent Coat:

- Manufacturer : International Paint

- Approvals required : Certifire- Product Reference : Interchar 212- Fire Resistance to BS 476 : Up to 3 hours- Dry Film Thickness : As required for section size- VOC : 0 gms per litre

- Decorative Top Coat(if required) :

- Manufacturer : International Paint- Product Reference : Interfine 979- Dry Film Thickness : 100 m nominal

- Colour : As required- VOC : 165 gms per litres

- Site Touch Up : Repair any intumescent damaged intransit or during erection in accordancewith International Paint (Gulf) LLCWorking Procedures

- Special Requirements : Refer to International Paint (Gulf) LLC WorkingProcedures re handling, transportation andstorage of steelwork treated with Interchar 212offsite. -


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4.13 110(D) On site installation of castings to pr imed steel internally

- Use/Location : To circular and rectangular freestanding columns

- Preparation and priming bysteelwork contractor : Specification reference G10/710

- Intumescent Coat- Manufacturer : Interactive columns by Interact FireSolutions Limited (Tel: +44 1694 751394)using International Interchar 212Intumescent. The subcontractor mustallow for the provision of qualitymanagement by Interact Fire Solutionsand the costs associated with this.

- Fire resistance : Up to 2 hours- Finish : High decorative, roller applied.- Top Sealer Coat

- Manufacturer : International Paint (Gulf) LLC

- Product reference : Polysiloxane Interfine 979- Dry Film Thickness : 100 m- Colour : As required


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5. FINISH REQUIRMENTS

Architect is to confirm which of the following finishes is required for specific locations:-

440 Basic Finish:Reasonably smooth and even, orange peel, other textures, minor

runs, similar minor defects are acceptable.

450 Normal Decorative Finish:A good standard of cosmetic finish generally viewedfrom a distance of 5m or more. Minor orange peel or other texture is usuallyacceptable.

460 High Decorative Finish:A high standard of evenness, smoothness and glosswhen viewed from a distance of 2m or more.

Working Procedures for Handling, Transportation and Storage of Interchar 212

1. Handling

The handling of the coated steelwork may include such design features as liftingholes and lugs which will assist in minimising the potential damage. Where suchfeatures are not utilised the use of special lifting harnesses/nylon slings, webbinghelp to spread the load over a larger surface area.

2. TransportationSeparators shall be provided to prevent steel to steel contact and shall be adequatefor intended use. It is essential the coatings are protected from the possible effectsof ponded water.

3. StorageSeparators used to reduce transit damage may also be utilised for the same

purpose in site storage. Timber provides a good surface on which steel may be laidout with minimum damage to coating. It is essential the coatings are protected fromthe possible effects of ponded water.

4. Future Inspection and MaintenanceThe fire resistance of the Interchar system will remain as long as the coating is inperfect condition.

Inspection of the fire protection system should be carried out every 2-5 yearsdepending on the environment. Any defects, damaged areas must be repaired asper International Paint (Gulf) LLC Recommended Working Procedures.


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6. GENERAL REQUIREMENTS

205 VALIDATION OF MATERIALS: A project specific evaluation of intumescent coatingmaterials, in accordance with BS8202 : Part 2, Clause 4 is to be provided to the CA onrequest.

210 WORKING PROCEDURES:- Comply with BS8202 : Part 2 and International Paint (Gulf) LLC ' requirements and

recommendations.- Immediately after completion of the work submit copies of the quality control

records/certificates recommended by International Paint (Gulf) LLC '.

220 APPLICATOR'S PERSONNEL must have appropriate skill in applying and generalknowledge of anticorrosive and intumescent coatings. Provide evidence of competenceand experience to the CA on request.

230 SUITABILITY OF CONDITIONS

- Take all necessary precautions including restrictions on working hours, providingtemporary protection and allowing extra drying time, to ensure that coatings are notadversely affected by climatic conditions before, during and after application.

- Prevent or control exposure of operatives to dust, vapour and fumes. Application ofcoatings will be taken as joint acceptance by the Main Contractor and the CoatingContractor of the suitability of surfaces and conditions within any given area to receivethe specified coatings.


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240 DIFFICULT ACCESS AREAS. Consider, well in advance, any problems of access to areasto be coated, bearing in mind the need to achieve complete integrity of the fire protection.Seek advice from International Paint (Gulf) LLC and, if required, obtain instructions from theCA.

260 CONTROL SAMPLES: Prepare sample areas of the finished work in advance of theremainder as set out below. Obtain approval of appearance before proceeding.

270 INSPECTION- Permit Interact Fire Solutions to inspect the work in progress and all quality control

records, take dry film thickness and other measurements and take samples of coatingproducts if required. Do not comply with any directions or requests which vary thespecifications unless and until confirmed by the CA. Submit a copy of intumescentcoating manufacturer's inspection reports to the CA without delay.

- Notify the CA of projected date(s) for start of surface preparation and coating.


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7. PREPERATION FOR PAINTING AND PAINT APPLICATION

5.1 G10/710 OFFSITE PREPARATION AND PAINTING to be carried out under cover in properlylit, heated and ventilated conditions. Select sequence of working from one of thefollowing and inform CA before starting work:

- Fabricate - blast clean - prime as specified- Blast clean - fabricate - prime as specified (Immediately before priming remove flashrust with a light overall sweep blast), or

- Blast clean - prime with a weldable prefabrication primer recommended by themanufacturer of the specified primer - fabricate - prime as specified (Thickness ofpost-fabrication priming coat may be reduced if and as recommended bymanufacturer).

- If a prefabrication primer is to be used apply a suitable product recommended byInternational Paint (Gulf) LLC.

5.2 G10/715 INACCESSIBLE SURFACES:The sequence of working must be such as to ensure that surfaces inaccessible after

assembly receive the full specified treatment and coating system including, ifnecessary, local shop application of site coatings.

5.3 G10/720 BLAST CLEANING FOR PAINTING:- Ensure that steel complies with Sa 2.5 (ISO 8501-1 1998) at time of blasting as

follows:Dry blasting: Initial rust grade A or B.

- Blast clean to the specified Sa 2.5 preparation grades. Use abrasive of suitable typeand size, free from contamination by fines, water and oil. Remove abrasiveresidues.

- Remove all surface defects likely to be detrimental to the protective painting system,including:

Defects in the steel, including cracks, surface laminations, shelling and deep pittingas required by BS 4360.

- Defects resulting from fabrication, including fins at cuts, burrs, sharp edges andweld spatter.

- Apply primer as soon as practicable and while the surface is still in a conditionacceptable to International Paint (Gulf) LLC.

5.4 G10/730 SHOP PREPARATION FOR SITE WELDING OF SHOP PAINTED STEELWORK:- Blast clean to Sa 2.5 and mask weld areas before coating surrounding areas. If

more than one coat is applied to surrounding areas, step each 30mm back fromedge of preceding coat. Remove masking immediately before welding.

- Alternatively prepare and shop paint weld areas as specified, then grind off to baresteel immediately before welding.


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5.5 G10/735 TREATMENT OF SITE WELDED JOINTS IN PAINTED STEELWORK:- After welding, and without delay, vacuum blast all weld areas to a minimum

standard of Sa 2.5(ISO 8501-1 1988).- Prime without delay and apply further coatings to the weld areas to match the

surrounding painted areas.

5.6 G10/740 BOLTED JOINTS (NON-FRICTION GRIP):- Where steelwork is to be shop painted, ensure that the full shop specification is

applied to joint faces.- Immediately before assembling bolted joints in externally exposed steelwork, apply

a further coat of primer and bring the surfaces together while still wet.- Before applying site coatings to externally exposed steelwork, seal all crevices to

bolts and joint perimeters with compatible mastic.

5.7 G10/745 FAYING SURFACES OF FRICTION GRIP JOINTS:- Blast clean and mask before coating surrounding areas. The masking must

adequately protect the faying surface from deterioration and contamination.

- If more than one coat is applied to surrounding areas, step each coat 30 mm backfrom edge of preceding coat.

- Remove masking immediately before bolting, check faying surfaces are free fromadhesive, and clean with solvent if necessary.

5.8 G10/750 FRICTION GRIP JOINTS IN SHOP PAINTED STEELWORK:- After final tightening of bolts, and without delay, thoroughly degrease and clean bare

steel at joint edges and prime with Interplus 356.- Seal all crevices to bolts and joint perimeters with compatible mastic.- Apply further coatings to surrounding areas to match adjacent shop painted areas

before applying specified site coatings.

5.9 G10/755 UNCOATED FASTENINGS:After erection, thoroughly degrease and clean and, without delay, apply Interplus356 followed by specified top coat.

5.10 G10/760 GALVANISED FASTENINGS:After erection, thoroughly degrease and clean and apply a suitable etch primerbefore applying specified site coating(s).

5.11 G10/765 SITE PREPARATION OF SHOP PAINTED STEELWORK:Carry out all necessary remedial work as specified. Prior to applying any site coatsensure surfaces are dry being free of any dirt, grit, grease or other contamination.

5.12 G10/770 SITE PREPARATION OF GALVANISED SURFACES FOR PAINTING: Thoroughlydegrease. If metal coating is defective obtain instructions before proceeding.Remove any white corrosion products with a stiff brush, wash off and allow to drybefore applying specified etching wash or primer.


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PAINTING

5.13 G10/805 FINISHES GENERALLY:- Once applied the finish should not in any way slump, flow, crack, flake, split, sag,

pit, bubble, blister, float, effloresce, craze, shrink, break, wrinkle or crinkle.- Thinners shall not be added to paint to change in any way its constitution or

consistency unless agreed by International Paint (Gulf) LLC.

- All finishes should be durable, of uniform texture and colour and should be resilient.- All finishes should be uniform in texture, colour and appearance within the limits ofthe agreed samples and without irregularities or distortion. Finish coatings shallmatch the colour and gloss of the agreed control samples.

- There shall be an interval of at least 24 hours between successive coats of paintingor as recommended by International Paint (Gulf) LLC.

- The external aesthetic performance of the polysiloxane material is critical to itschoice and the manufacturer must be able to show over 10,000 hours quvresistance with a gloss retention of above 50% as measured over this time period.

- On request evidence to be shown that after 28 days weathering in a C5-Ienvironment the polysiloxane when subjected to a th inch mandrel bend test, inaccordance with ISO 1519,will show that no cracking/disbondment has occurred.

- Because of concern re: flexibility, Epoxy Polysiloxanes are explicitly not approved.- Specular gloss levels for Interfine 979 acrylic polysiloxane at 60 degrees to the

vertical will be typically 85 units as specified and shall be measured in accordancewith BSEN ISO 2813.

5.14 G10/810 SUITABILITY OF CONDITIONS:- Do not apply coatings:- To surfaces affected by moisture or frost.- Unless the steel temperature is at least 3C above the dew point with conditions

stable or improving.- Unless the relative humidity is below 85%.- When heat is likely to cause blistering or wrinkling.

- Take all necessary precautions including restrictions on working hours, providingtemporary protection and allowing extra drying time, to ensure that coatings are notadversely affected by climatic conditions before, during and after application.

- Application of coatings will be taken as joint acceptance by the Main Contractor andSubcontractor of the suitability of surfaces and conditions within any given area.

5.15 G10/815 APPLYING COATINGS:- Apply coatings to clean, dust free, dry surfaces in dry atmospheric conditions and

after any previous coats have cured adequately.- Apply coatings evenly to give a smooth finish of uniform thickness and colour, free

from brush marks, nibs, sags, runs and other defects.Keep all surfaces clean and free from dust during coating and drying.Adequately protect completed work from damage.

- Wherever possible, coatings are to be from one manufacturing batch. Where morethan one batch is to be used, keep separate, allocate to distinct parts or areas of thework, and inform the CA accordingly.

- Keep all surfaces clean and free from dust during coating and drying. Adequatelyprotect completed work from damage.


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- Materials used in preparation should be of the types recommended by their

manufacturers and the coating manufacturer for the situation and the surfaces beingprepared.

- Making Good: All unsatisfactory paintwork should be made good in accordance withclause G10/550 and to the satisfaction of the CA.

- Application of coatings should not occur until the surfaces and conditions within anygiven area to receive the specified coatings are acceptable.

- Adhere to manufacturers recommendations for intercoat preparation and maximumand minimum drying periods.- Brushes generally to comply with the requirements of BS 6150 and BS 2992.- Roller application shall be to BS 6150.- Spray application shall be to BS 6150 generally. The Trade Contractor shall submit

details of the spraying equipment for review by the Design Team. Comply with allHealth and Safety requirements for spraying.

- Special attention is to be given to the site painting of Bolt assemblies. These areasmust be done in a neat and uniform manner such that the colour and finish blends inwith its surrounding to the satisfaction of the CA.

5.16 G10/820 FILM THICKNESS:

- Check the thickness of each coat during application using a wet film thicknesswheel or comb in accordance with BS 3900:Part C5.

- After each coat has dried measure the total accumulated dry film thickness using amagnetic or electromagnetic meter, checked against standard shims andrecalibrated regularly against a smooth steel reference plate, the number andposition of measurements to be as directed by CA. Carry out all measurements inthe presence of the CA unless otherwise directed.

- Where a nominal d.f.t is specified over a scheduled area of coating the averageaccumulated dry film thickness must equal or exceed the specified thickness, withno reading less than 75% of the specified thickness.

- If at any stage the accumulated dry film thickness is deficient, the CA may requireapplication of additional coat(s) at no extra cost. Where a minimum d.f.t. has been

specified any areas found to be below specified figure will be made good at no extracost.

5.17 G10/825 STRIPE COATS:Stripe coating of welds, edges and corners of flanges, nuts and bolt heads, roughweld seams, and areas that are difficult to access is to be carried out by brush priorto the spray application of the specified primer. A stripe coat of Interfine 979Polysiloxane is to be applied at 50 m d.f.t. over the same stripe coated areas,where the Interfine 979 system has been specified.

5.18 G10/830 COLOUR OF TOP COAT to be selected by Architect (unless already specified).

5.19 G10/850 JUNCTIONS WITH CONCRETE:Where exposed steelwork is partially embedded or encased in concrete, apply twocoats of an approved bituminous coating locally to the steel/concrete junction asinstructed by CA.

IPG Structural Steelwork Paint Systems.pdf

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