MULTI-PLATE PRODUCT GUIDE - Armtec

MULTI-PLATEHEIGHT-OF-COVER TABLERoundMinimum 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 ThicknessDiameter Highway Railway 3.0 4.0 5.0 6.0 7.0mm CL-625 E-90 mm mm mm mm mm1,500 300 500 18.6 28.0 36.1 42.7 48.81,660 300 500 16.9 25.4 32.8 38.9 44.41,810 310 500 15.4 23.3 30.1 35.7 40.81,970 336 500 14.2 21.5 27.8 32.9 37.72,120 362 530 13.1 19.9 25.8 30.6 35.02,280 388 570 12.2 18.5 24.0 28.5 32.62,430 414 610 11.4 17.3 22.5 26.7 30.62,590 440 648 10.7 16.3 21.1 25.1 28.72,740 466 914 10.1 15.3 19.9 23.7 27.13,050 600 914 9.0 13.7 17.8 21.2 24.33,360 600 914 8.1 12.4 16.1 19.2 22.03,670 621 914 7.3 11.3 14.7 17.5 20.13,990 673 1,219 6.7 10.4 13.5 16.1 18.44,300 724 1,219 6.2 9.6 12.4 14.8 17.04,610 776 1,219 5.7 8.8 11.5 13.7 15.84,920 828 1,219 - 8.2 10.6 12.7 14.75,230 880 1,524 - 7.7 9.9 11.9 13.75,540 931 1,524 - 7.3 9.3 11.1 12.85,850 983 1,524 - - 8.7 10.4 12.06,160 1,035 1,524 - - 8.2 9.8 11.3• 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 300mm• Minimum heights of cover for E-90railway loads are based on theAREMA Manual for RailwayEngineering• Minimum heights of cover for E-90railway loads are measured from thetop of the pipe to the base of therailway tiesFor AISI height of cover tables, pleaserefer to the Corrugated Steel PipeInstitute (CSPI) “Handbook of SteelDrainage and Highway ConstructionProducts”6,470 1,081 1,829 - - 7.8 9.3 10.76,780 1,138 1,829 - - - 8.8 10.17,090 1,190 1,829 - - - 8.4 9.67,400 1,242 1,829 - - - - 9.27,710 1,294 1,829 - - - - 8.8