MULTI-PLATE PRODUCT GUIDE - Armtec

MULTI-PLATEHEIGHT-OF-COVER TABLEArchesMinimum Heightof Cover (mm)Maximum Height of Cover (metres)for Highway Loading_NOTESThe maximum Heights-of-Cover havebeen determined in accordance withCHBDC Design Procedures and thefollowing assumptions:Plate ThicknessSpan Rise Highway 3.0 4.0 5.0 6.0 7.0mm mm CL-625 mm mm mm mm mm1,520 810 300 18.4 27.7 35.7 42.2 48.21,830 840 315 15.1 22.8 29.5 35.0 40.0970 315 15.4 23.2 30.0 35.5 40.62,130 860 370 13.1 19.8 25.6 30.4 34.81,120 370 13.0 19.7 25.6 30.3 34.72,440 1,030 420 11.5 17.4 22.5 26.8 30.61,270 420 11.4 17.3 22.4 26.6 30.52,740 1,180 475 10.0 15.2 19.8 23.5 26.91,440 475 10.1 15.4 19.9 23.7 27.13,050 1,340 600 9.0 13.7 17.8 21.2 24.31,600 600 9.0 13.8 17.9 21.3 24.43,350 1,360 600 8.1 12.5 16.2 19.3 22.11,750 600 8.1 12.4 16.1 19.2 22.03,660 1,520 625 7.4 11.4 14.8 17.7 20.31,910 625 7.4 11.4 14.7 17.6 20.23,960 1,680 680 6.7 10.4 13.5 16.1 18.52,060 680 6.7 10.4 13.5 16.2 18.64,270 1,840 730 6.2 9.6 12.5 14.9 17.12,210 730 6.2 9.6 12.5 14.9 17.24,570 1,870 790 5.8 8.9 11.5 13.8 15.92,360 790 5.8 8.9 11.5 13.8 15.94,880 2,030 835 5.4 8.3 10.8 12.9 14.82,520 835 5.4 8.3 10.7 12.9 14.85,180 2,180 882 5.1 7.8 10.1 12.1 13.92,690 882 5.1 7.8 10.0 12.0 13.85,490 2,210 950 4.8 7.3 9.3 11.2 12.92,720 950 4.8 7.3 9.4 11.3 13.05,790 2,360 990 - 7.0 8.8 10.6 12.22,880 990 - 6.9 8.8 10.5 12.26,100 2,530 1,040 - 6.6 8.4 9.9 11.53,035 1,040 - 6.6 8.3 9.9 11.5• Unit weight of backfill materialassumed to be 22 kN/m 3• Backfill is assumed to be compactedto a minimum of 95% StandardProctor Dry Density• Highway Live load used in the designprocedure is the CL-625 truck as perCAN/CSA S6 (CHBDC)• Minimum height of cover is based onCHBDC (S6) formula for spans >3,000mm• CHBDC minimum heights of cover forCL-625 highway loads are measuredfrom the top of the pipe to theroadway surface• For spans < 3,000mm, minimumheights of cover for CL-625 highwayloads are not less than one sixth ofthe span nor 300mmFor AISI height of cover tables, pleaserefer to the Corrugated Steel PipeInstitute (CSPI) “Handbook of SteelDrainage and Highway ConstructionProducts”