Exterior Steel Painting Question

[shuff213]

Doing some reinforcement and renovations to an existing structure with structural steel exposed to the elements.

Currently, I've specified that the contractor "remove rust and loose mill scale. Clean steel in accordance with SSPC SP-3."

Any suggestions for the primer/paint I should specify? Note-form specifications are appearing on the drawings.

Thanks for any input.

 

[JedClampett]

I like to use two coats of epoxy and a topcoat of polyurethane. It might be overkill, but I sleep at night. All the major coating amnufacturers (Tnemec, Devoe, Sherwin Williams, etc.) make a myriad of systems that will work.

 

[bridgebuster]

ditto what Jed wrote. You can also include manufactures such as Wasser, Carboline, and Mercury Paint.

 

[DDBPE]

Agree with Jed and Bridge, having been on projects field painting bridge beams,they used a 3 coat system, I believe it was Sherwin Williams. Each coat was a different color to ensure everything was coated and had different wet mil thicknesses for each coat.

 

[dik]

From my drawing notes (CTS):

COATING SYSTEMS

SURFACE PREPARATION

SURFACE PREPARATION AND APPLICATION OF COATINGS TO BE IN ACCORDANCE WITH THE MANUFACTURER'S PRINTED INSTRUCTIONS. IN THE ABSENCE OF PRINTED INSTRUCTIONS CLEAN NEW STEEL TO SSPC-SP 10, 'NEAR-WHITE BLAST CLEANING'

ALL DIRT AND DELETERIOUS CONTAMINATION SHALL BE REMOVED BY 2500 PSI MIN HIGH PRESSURE FRESH WATER WASHING. CLEAN USING COMPRESSED AIR

ALL LOOSE MILL SCALE, LOOSE RUST AND LOOSE PAING SHALL BE REMOVED BY HAND TOOL CLEANING OR POWER CLEANING. ALL WELD SPATTER AND FLUX SHALL BE REMOVED BY CHIPPING OR GRINDING. SHARP EDGES SHALL BE GROUND SMOOTH. CLEAN TO SSPC-SP 1


COATING SYSTEMS (GENERAL)

EXPOSED COATINGS TO MPI / ARCHITECTURAL PAINTING SPECIFICATION MANUAL

[COATING SYSTEM USED SHALL BE IN ACCORDANCE WITH THE CURRENT KOCH (FKCULC) COATING SPECIFICATION 09920, 'PROTECTIVE COATING FOR STEEL' | COATING SYSTEM USED SHALL BE IN ACCORDANCE WITH THE CURRENT MOSAIC STANDARD J-007 (FOR K2 UNDERGROUND)]

ALL [CONCEALED | EXPOSED] STRUCTURAL STEEL TO BE PRIME PAINTED

ALL EXPOSED STRUCTURAL STEEL SHALL HAVE BOTH A PRIME COAT AND A TOP COAT U/N

MANUFACTURER'S REPRESENTATIVE SHALL BE CONSULTED FOR SUITABILITY OF APPLICATION U/N

COATING THICKNESS TO MANUFACTURER'S PRINTED INSTRUCTIONS U/N

DEPTH OF BLAST PROFILE CREATED BY CLEANING METHOD SHALL BE LESS THAN DFT

DFT SHALL ACCOMMODATE 'ROGUE' PEAKS CREATED IN BLAST PROFILE

STEEL TO BE COATED SHALL BE FREE OF ALL DELETERIOUS MATERIAL

PRIMER AND/OR TOPCOAT SHALL BE COMPATIBLE WITH HDG AS REQD

FILE OR GRIND EXPOSED WELDS SMOOTH AND FLUSH

FOR EACH COATING LAYER, TOUCH UP AND REPAIR ALL DAMAGED AREAS

PRIME COAT SHALL BE COMPATIBLE WITH TOP COAT

COLOURS SHALL BE SELECTED BY THE OWNER FROM THE PAINT MANUFACTURER'S LIST OF STANDARD PROVEN COLOURS

TOPCOAT COLOUR FOR ALL COMPONENTS HAVING A CSSBI DESIGNATION SHALL BE SELECTED BY THE CLIENT FROM THE MANUFACTURER'S LIST OF STANDARD PROVEN COLOURS

DO NOT PROVIDE COATING ON SURFACES IN CONTACT WITH CONC, FAYING SURFACES OF BOLTED JOINTS, AREAS TO BE WELDED, BEARING SURFACES IN DIRECT CONTACT WITH CONC, MASONRY OR STEEL AND SURFACES TO RECEIVE SHEAR CONNECTORS

ALTERNATIVE COATING SYSTEMS PROPOSED BY THE STEEL FABRICATOR SHALL BE REVIEWED BY THE [CONSULTANT | ENGINEER]

THE FOLLOWING COATING SYSTEMS SHALL BE USED:
SYSTEM 01: CISC/CPMA 1/73A
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 6
PRIMER - CONFORM TO CISC/CPMA 1/73A

SYSTEM 02: CISC/CPMA 2/75
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 6
PRIMER - CONFORM TO CISC/CPMA 1/73A

SYSTEM 03: QUALITY PRIMER
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - DEVOE 'DEVGUARD 4160 - MULTIPURPOSE TANK AND STRUCTURAL PRIMER'

SYSTEM 04: FAYING SURFACES (EPOXY TOPCOAT):
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - DEVOE 'CATHACOAT 302HB - REINF INORGANIC ZINC PRIMER'

SYSTEM 05: HOT DIPPED GALVANISING
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
HDG - TO ASTM A123, THICKNESS TO Z275

SYSTEM 06: ELECTROPLATE GALVANISING (INTERIOR ONLY)
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
GALV - ASTM A123, THICKNESS TO ZF075

SYSTEM 07: QUALITY PRIMER WITH TOPCOAT (INTERIOR)
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 6
PRIMER - DEVOE 'DEVGUARD 4160 - MULTIPURPOSE TANK AND STRUCTURAL PRIMER'
TOPCOAT - DEVOE 'SPEEDENAMEL 4318 - QD GLOSS ENAMEL'

SYSTEM 08: QUALITY PRIMER WITH TOPCOAT (EXTERIOR)
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 6
PRIMER - DEVOE 'DEVGUARD 4160 - MULTIPURPOSE TANK AND STRUCTURAL PRIMER'
TOPCOAT - DEVOE 'DTM URETHANE-ALKYD GLOSS ENAMEL'
ALT: DEVOE 'DEVTHANE 379H - ALIPHATIC URETHANE GLOSS ENAMEL'

SYSTEM 09: EPOXY WITH ZINC RICH PRIMER
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - DEVOE 'CATHACOAT 302HB - REINF INORGANIC ZINC PRIMER
TOPCOAT - DEVOE 'BARRUST 235 - MULTIPURPOSE EPOXY COATING'

SYSTEM 10: EPOXY COATING OVER HDG
BASE METAL - HDG STEEL
CLEANING - TO SSPC-SP 1
WASH - POLYCLUTCH 97-687 BY PPG OR APPD EQ
PRIMER - AMERLOCK 400 TWO COMPONENT EPOXY BY PPG OR APPD EQ
TOPCOAT - AMERCOAT 450H TWO COMPONENT ALIPHATIC POLYURETHANE TOPCOAT BY PPG

SYSTEM 11: EPOXY COATING OVER HDG (ALTERNATIVE)
BASE METAL - HDG STEEL
CLEANING - TO SSPC-SP 1
PRIMER - DEVOE DEVRAN 201 EPOXY
TOPCOAT - DEVOE DEVTHANE 379 URETHANE

SYSTEM 12: THREE PART EPOXY COATING OVER HDG
BASE METAL - HDG STEEL
CLEANING - TO SSPC-SP 1
PRIMER - DEVOE DEVRAN 201 EPOXY
SUBCOAT - DEVOE 'BARRUST 235 - MULTIPURPOSE EPOXY COATING'
TOPCOAT - DEVOE 'DEVTHANE 379H - ALIPHATIC URETHANE GLOSS ENAMEL'

SYSTEM 13: EPOXY COATING
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - DEVOE 'BARRUST 235 - MULTIPURPOSE EPOXY COATING'
TOPCOAT - DEVOE 'BARRUST 235 - MULTIPURPOSE EPOXY COATING'

SYSTEM 14: EPOXY PRIME COATING (MANITOBA FLOODWAY)
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - CLOVERDALE ''

SYSTEM 15: INTUMESCENT COATING
BASE METAL - STEEL
CLEANING - TO SSPC-SP 10
PRIMER - DEVOE 'DEVGUARD 4160 - MULTIPURPOSE TANK AND STRUCTURAL PRIMER'
SUBCOAT - 3M '3M FIRE DAM WB 1000'
TOPCOAT - DEVOE 'DEVFLEX 4216HP WATERBORNE ACRYLIC SEMI-GLOSS ENAMEL'

SYSTEM 16: CSSBI BARRIER
CONFORM TO CSSBI B-17 BARRIER COATING
CLEANING - TO SSPC-SP 1
HDG - TO ASTM A123, THICKNESS TO Z275
EXPOSED SIDE
PRIMER - 0.3 DFT MIL MIN
TOPCOAT - 12 MIL DFT MIN PVC
CONCEALED SIDE
PRIMER - 0.2 MIL DFT MIN
TOPCOAT - 8 DFT MIL MIN PVC

SYSTEM 17: CSSBI SERIES 5000
CONFORM TO CSSBI SERIES 5000 COATING
HDG - GALVALUME TO ZF075 (INTERIOR)
HDG - ASTM A123, THICKNESS TO Z275 (EXTERIOR)
PRIMER -
TOPCOAT -

SYSTEM 18: CSSBI SERIES 10000
CONFORM TO CSSBI SERIES 10000 COATING
HDG - GALVALUME TO ZF075 (INTERIOR)
HDG - TO ASTM A123, THICKNESS TO Z275 (EXTERIOR)
PRIMER -
TOPCOAT -

SYSTEM 19: CSSBI METALLIC/ELITE SERIES
CONFORM TO CSSBI METALLIC/ELITE SERIES
HDG - GALVALUME TO ZF075 (INTERIOR)
HDG - TO ASTM A123, THICKNESS TO Z275 (EXTERIOR)
PRIMER -
TOPCOAT -

SYSTEM 20: ALUMINUM COATING
BASE METAL - ALUMINUM
PRIMER - DEVOE 'DEVTHANE 378'
TOPCOAT - NOT REQD

SYSTEM 21: POLYURETHANE CONCRETE COATING
BASE MATL - CONCRETE
PRIMER - EUCLID 'DURAL 356' EPOXY
TOPCOAT - EUCLID 'TAMOSHIELD' POLYURETHANE COATING

SYSTEM 22: TWO PART EPOXY COATING WITH TOPCOAT
BASE METAL - STEEL
CLEANING - TO SSPC-SP 1 AND SSPC-SP 10
PRIMER - DEVOE DEVRAN 201 EPOXY
SUBCOAT - DEVOE 'BARRUST 235 - MULTIPURPOSE EPOXY COATING'
TOPCOAT - DEVOE 'DEVTHANE 379H - ALIPHATIC URETHANE GLOSS ENAMEL'

SYSTEM 23: POLYURETHANE COATING OVER HDG (ALTERNATIVE)
BASE METAL - HDG STEEL
CLEANING - TO SSPC-SP 1
PRIMER - DEVOE DEVRAN 201H (POLYAMIDE EPOXY)
TOPCOAT - DEVOE DEVTHANE 379H (ALIPHATIC POLYURETHANE)

SYSTEM 24: MOSAIC UNDERGROUND (J-007 SPEC)
BASE METAL - STEEL
CLEANING - WATER BLAST 2500 PSI MIN, COMPRESSED AIR DRY, AND
TO SSPC-SP 1
PRIMER - ALKYD ZINC CHROMATE PRIMER; DFT 3 MIL
TOPCOAT - OIL MODIFIED ALKYD TITANIUM OXIDE; DFT 1.5 MIL
COLOUR - MOSAIC YELLOW

BASE METAL - STEEL
CLEANING - WATER BLAST 2500 PSI MIN, COMPRESSED AIR DRY, AND
TO SSPC-SP 1
PRIMER - INTERNATIONAL INTERPRIME 198; DFT 2.5 MIL
SUBCOAT - INTERNATIONAL INTERLAC 665 FD; DFT 1.5 MIL
TOPCOAT - INTERNATIONAL INTERLAC 665 FD; DFT 1.5 MIL
COLOUR - MOSAIC YELLOW

BASE METAL - STEEL
CLEANING - WATER BLAST 2500 PSI MIN, COMPRESSED AIR DRY, AND
TO SSPC-SP 1
PRIMER - PITTSBURGH PRIMER 7-758; DFT 3.0 MIL
TOPCOAT - PITTSBURGH GLOSS ALKYD ENAMEL 7-800; DFT 4.0 MIL
COLOUR - MOSAIC YELLOW

BASE METAL - STEEL
CLEANING - WATER BLAST 2500 PSI MIN, COMPRESSED AIR DRY, AND
TO SSPC-SP 1
PRIMER - DEVOE DEVGUARD 4100; DFT 2.0 MIL
TOPCOAT - DEVOE DEVGUARD 4308; DFT 2,5 MIL
COLOUR - MOSAIC YELLOW


COATING SYSTEM USED:
PROVIDE THE STIPULATED COATING SYSTEM TO THE FOLLOWING ELEMENTS U/N:
REINFORCING STEEL: SYSTEM 05
ALL STRUCTURAL STEEL (EXTERIOR): SYSTEM 08
ALL STRUCTURAL STEEL (INTERIOR): SYSTEM 07
SUPERSTRUCTURE (EXTERIOR): SYSTEM 08
SUPERSTRUCTURE (INTERIOR): SYSTEM 07
SUPERSTRUCTURE INCL GIRTS AND SAG RODS (EXTERIOR): SYSTEM 08
SUPERSTRUCTURE INCL GIRTS AND SAG RODS (INTERIOR): SYSTEM 07
GIRTS AND SAG RODS (EXTERIOR): SYSTEM 08
GIRTS AND SAG RODS (INTERIOR): SYSTEM 07
METAL FABRICATIONS (EXTERIOR): SYSTEM 08
METAL FABRICATIONS (INTERIOR): SYSTEM 07
INDUSTRIAL GUARD RAILS: SYSTEM 05
INDUSTRIAL FIXED LADDERS AND CAGES: SYSTEM 05
SECTIONAL GRATING: SYSTEM 05
TRENCH GRATING: SYSTEM 05
FLOORPLATES: SYSTEM 05
MECHANICAL EQUIPMENT SUPPORTS: SYSTEM 05
ELECTRICAL EQUIPMENT SUPPORTS: SYSTEM 05
CABLE TRAY SUPPORTS: SYSTEM 05
HDG MATERIAL: [SYSTEM 11 | SYSTEM 12]
ALUMINUM MATERIAL: SYSTEM 20
ROOF PURLINS: SYSTEM 05
WALL GIRTS:
OWSJ (EXTERIOR): SYSTEM 08
OWSJ (INTERIOR): SYSTEM 07
LONG SPAN ROOF TRUSSES (EXTERIOR): SYSTEM 08
LONG SPAN ROOF TRUSSES (INTERIOR): SYSTEM 07
ROOF DECK (EXTERIOR): SYSTEM 05
ROOF DECK (INTERIOR): SYSTEM 06
FLOOR DECK (EXTERIOR): SYSTEM 05
FLOOR DECK: (INTERIOR): SYSTEM 06
WALL CLADDING: SYSTEM 16
LINER PANELLING: SYSTEM 16
TRIM, RAKE, FLASHINGS: SYSTEM 16
DOWNSPOUTS, SCUPPERS, EAVESTROUGHING: SYSTEM 16
METAL DOORS AND FRAMES (INTERIOR): SYSTEM 07
METAL DOORS AND FRAMES (EXTERIOR): SYSTEM 11
COLD FORMED METAL FRAMING (ALL COMPONENTS): SYSTEM 05

 

[Ron]

Agree with above except that I would specify SP6 as a minimum and SP10 if necessary for the coating

 

[shuff213]

Thank you for all of the feedback, much appreciated.