The construction method used for our elbows depends on diameter and configuration. Standard round diameters (8 through 30 inches) are constructed with rolled seam or standing seam. Fittings with a standing seam construction have been tested and shown to outperform solid-welded fittings. For the remaining diameters of elbows (31 through 60 inches) and for all diameters of other PVC COAT fittings, the seam is riveted and bonded, button punched and bonded, or fastened with stainless steel sheet metal screws and bonded. PVC COAT duct and fittings are galvanized steel with a polyvinyl chloride (PVC) plastic coating that has been specially developed to resist corrosion in underground and concrete-encased underground airflow applications. The PVS plastic coating material has passed thousands of hours of accelerated salt spray, humidity cabinet, and water immersion tests with no loss of adhesion or corrosion resistance. It resists corrosion from concrete and corrosion from minerals and salts found in normal backfill materials. PVC COAT duct and fittings enable you to install high-performance underground airflow systems. All components are machine-formed to ensure uniform size, construction, and performance. Standard PVC COAT duct and fittings have a single-wa;;, round design. Standard diameters of 8 through 60 inches are available. We also offer double-wall, insulated round duct and fittings.
CODE DIA   28,26 GA 24 GA 22 GA 20GA 18 GA 16 GA
SP3G 3” AVAILABLE UPON REQUEST
SP4G 4” 2.10 2.66 3.24 3.62    
SP5G 5” 2.48 3.24 4.00 4.56    
SP6G 6” 3.04 4.00 4.76 5.32 7.04 9.50
SP7G 7” 3.42 4.56 5.52 6.28 8.36 11.02
SP8G 8” 4.00 5.14 6.28 7.22 9.50 12.54
SP9G 9” 4.56 5.90 7.04 8.36 10.46 14.26
SP10G 10” 4.94 6.46 7.80 9.32 11.60 15.78
SP11G 11” 5.52 7.04 8.56 10.46 12.74 17.30
SP12G 12” 5.90 7.80 9.50 11.02 14.82 19.00
SP13G 13” 6.46 8.56 10.26 11.98 16.16 20.52
SP14G 14” 6.84 9.12 11.02 12.92 17.30 22.04
SP15G 15” 7.42 9.70 11.78 13.88 18.62 23.76
SP16G 16” 7.80 10.46 12.54 14.82 19.76 25.28
SP18G 18” 8.74 11.60 14.06 16.72 22.24 28.50
SP20G 20” 10.66 12.92 15.78 18.62 24.70 31.74
SP22G 22” 11.76 14.26 17.30 20.33 27.18 34.78
SP24G 24” 12.84 15.58 18.82 22.24 29.46 38.00
SP26G 26” 13.78 16.72 20.34 24.14 31.92 46.24
SP28G 28” - 18.06 22.04 26.04 34.40 44.28
SP30G 30” - 19.38 23.56 27.74 36.86 47.50
SP32G 32” - - 25.08 29.64 39.34 50.74
SP34G 34” - - 26.80 31.54 41.80 53.78
SP36G 36” - - 28.32 33.44 44.28 57.00
SP38G 38” - - - 35.34 46.74 60.24
SP40G 40” - - - 37.06 49.22 63.28
SP42G 42’ - - - 38.96 51.68 66.50
SP44G 44” - - - 40.86 54.16 69.34
SP46G 46” - - - 42.76 56.62 72.78
SP48G 48” - - - 44.46 59.10 76.09
SP50G 50’ - - - 46.36 61.56 79.24
SP52G 52” - - - 48.26 63.84 82.28
SP54G 54’ - - - 49.38 66.32 85.90
SP56G 56’ - - - 51.88 68.78 88.74
SP58G 58” - - - 53.78 71.26 91.86
SP60G 60” - - - 55.68 73.72 95.00
SP62G 62” - - - - 76.20 98.24
SP64G 64” - - - - 78.66 101.46
SP66G 66” - - - - 81.14 104.50
SP68G 68’ - - - - 85.12 107.54
SP70G 70” - - - - 88.56 110.70
SP72G 72” - - - - 91.70 114.63
SMACNA GUAGEES
0-14” 26 GA
15-26” 24 GA
27-36” 22 GA
37-50” 20 GA
51-60” 18 GA
61-84” 16 GA
 

 

GALV 10” wg positive
ALUMINUM
3-14” 22 GA
15-26” 20 GA
27-36” 18 GA

 

2” wg positives
SPAL

ALUMINUM
LIST PTICE X 1.25 LESS DISCOUNT
SPSS STAINLESS STEEL LIST PTICE X 4.6 LESS DISCOUNT
SPSC SATIN COAT SAME AS GALVANIZED
SPPV P.V.C. COATED, SPIRAL 4 MILL USE LIST PRICE X 3.0 LESS DISCOUNT
SPPR PERFORATED SPIRAL FOR SPPR SILENCER OR AIR DISTRIBUTION
  SPIRAL WITH HOLES FOR AIR DISTRIBUTION (specify location) PRICING UPON REQUEST
 
DOUBLE RIB SPIRAL
AVAILABLE UPON REQUEST LIST X 1.1 LESS DISCOUNT 		 
SLIP COUPLING
PRICE 1 FOOT OF SPIRAL SAME GAUGE 		 
COMPANION FLANGE
AVAILABLE UPON REQEST 		 
ANGLE FLANGE
AVAILABLE UPON REQUEST 		 
QUICK SLEEVE COUPLING
AVAILABLE UPON REQUEST 		 
SPIRAL MATE RING CONNECTORS
AVAILABLE UPON REQUEST