Culvert Solutions Details

• Part No.
• 0803020100
• Manuf. No.
• Standard Pack Quantity
• 1

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Description

Strength of Steel
CSP culverts maintain the advantage of the strength of steel with a variety of coatings providing long service life. With allowable fill heights over 100 feet and minimum covers as low as 12 feet, CSP can be matched to the strength required. Established long-term materials properties ensure product performance throughout the design life.

AISI-1
Height of Cover Limits for Steel Pipe H20 or H25 Live Load • 2-2/3 x 1/2 Corrugation
Diameter or Span, in.	Min.* Cover, in.	Maximum cover (ft) for Specified Thickness (in.)
		0.064	0.079	0.109	0.138	0.168
12 15 18 21 24 30 36 42 48 54 60 66 72 78 84 90 96	12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12 12	248 198 165 141 124 99 83 71 62 (53)	310 148 206 177 155 124 103 88 77 67 (57)	248 217 173 145 124 108 94 80 68 (57) (48) (40) (32)	186 159 139 122 104 88 75 63 52 43 35	195 171 150 128 109 93 79 66 54 45
Notes: 1. Fill heights in parentheses require standard trench installations; all others my be embankment or trench. 2. In 12 in. through 36 in. diameter, heavier gages may be available – check with the manufacturer. * Minimum covers are measured from top of pipe to bottom of flexible pavement or top of pipe to top of rigid pavement. Minimum covers must be maintained in unpaved traffic areas.

"Real" Manning N-Values
Spiral Rib CSP	.012
Double Wall	.012
Concrete-Lined CSP	.012
Fully Paved cSP	.012
2-2⁄3 x 1/2 Helical
12"	.011
15"	.012
18"	.013
24"	.015
30"	.017
36"	.018
42"	.019
48"	.020
54" and larger	.021

Superior Hydraulics
CSP provides “smooth” alternatives and fabricated fittings for superior hydraulics. Spiral rib pipe and fully lined CSP have the lowest Manning n-values of any storm sewer material. Small diameter helical CSP also has very low roughness coefficients as proven through independent testing. Fabricated fittings provide superior hydraulics by minimizing energy losses at junctions.

Durability of Coatings
These factors, along with a variety of coating systems, mean CSP can meet any service life requirement. Galvanized, aluminized and polymer-coated CSP are just a few of the coating options. Expected service life can be determined using the NCSPA Service Life Guidelines.

Cost and Installation Advantages
CSP provides the lowest installed cost compared to other materials. This is due to the low up-front material costs plus the added advantages of reduced installation costs, especially in large diameters. CSP is one-tenth the weight of reinforced concrete pipe (RCP) and comes in lengths of 20 feet or longer. Add this to fewer joints and easy, positive connections and it equals an installation cost advantage.