Key Specifications
• Shop Drawings
• Patterns
• Castings Surface
• Coatings
• Construction
• Sealants
• Labor
Shop Drawings
• Scale to be a minimum of one inch equals one foot.
• Show all fasteners and weldments.
• Indicate all finishes.
• Indicate order quantities.
Patterns
• Must account for shrinkage at a rate of one eighth of an inch per linear foot.
• All edges and details must be clearly defined.
• Use of remnants as patterns.
Castings/Material
• Sand cast Class 30 grey iron ASTM A48
• Sand cast Aluminum Alloy 319 ASTM B 221
• Sand cast Bronze #12A Silicon Bronze ASTM B198
• All castings should be free of typical foundry defects such as porosity, cold shuts and warpage.
Surface
• Molding sand must have a minimum AFS 70 grain fineness on a 3 screen distribution.
• All gating and flashing must be thoroughly cleaned.
• All castings must be cleaned to bare white metal prior to the application of any finish coatings.
Coatings
Iron/Steel
• Pre-prime Zinc Chromate (shop applied)
• Primer Two component Epoxy Primer
• Finish Acrylic Polyurathane
Aluminum
• Primer Two component Epoxy Primer
• Finish Acrylic Polyurethane
Bronze
• # 4Satin Finish-Brushed
• Chemical Patina-Highlighted
• Increlac Lacquer/Paste Wax
Construction
• All weldments must be in strict accordance with AWS practices and procedures.
• Cast Iron 41MP Pure Nickel Rod
• Aluminum Alloy R4043 Aluminum Rod
• Bronze Alloy 3S1B Silicon Bronze Rod
• All fasteners are to be:
• Stainless Steel with Iron/Steel/Aluminum
• #12A Silicon Bronze with Copper-based alloys
Sealants
• One-part color matched Silicone sealant such as Dow Corning 795
Labor
• Only qualified craftsmen with proper certification are recommended.
• A minimum of five years experience is suggested.
