<strong>MULTI</strong>-<strong>PLATE</strong>UNDERPASS_NOTE:For additional information onunderpasses, contact your nearest<strong>Armtec</strong> sales officeTechnical DataNominal DimensionsInside Plate RadiiSpanRisePeriphery EndHole Spaces AreaBDimR tR sR cR b 5N 6N 9NTotalPlatesmm mm N m 2 mm mm mm mm mm TSCB TSCB TSCB3,750 3,340 47 10.0 1,210 1,700 2,135 1,065 3,405 0022 0000 1200 73,880 3,520 49 10.8 1,220 1,675 2,440 1,040 3,380 2021 0001 0200 83,980 3,700 51 11.8 1,240 1,780 2,540 1,065 3,580 0021 2001 0200 84,060 3,900 53 12.8 1,260 1,830 2,795 1,090 3,680 1021 0001 1200 84,110 3,980 54 13.3 1,280 1,880 2,845 1,120 3,785 0021 1001 1200 84,200 4,060 55 13.7 1,290 1,880 3,125 1,090 3,760 0020 1002 1200 84,510 4,090 57 14.7 1,300 1,980 3,300 1,040 3,990 0021 1000 1201 84,660 4,220 59 15.8 1,340 2,110 3,020 1,090 4,240 0421 1000 1001 104,730 4,380 61 16.7 1,240 2,100 3,605 1,015 5,260 1421 2000 0001 114,820 4,580 63 17.9 1,260 2,135 3,630 1,040 5,310 1221 2200 0001 114,990 4,710 65 19.0 1,280 2,210 3,935 1,040 5,485 0220 0201 2001 105,110 4,820 67 20.2 1,240 2,335 3,630 1,065 7,265 2021 0400 1001 115,250 4,840 68 20.8 1,240 2,390 3,685 1,040 7,085 2020 0401 1001 115,380 5,130 70 22.3 1,580 2,440 3,760 1,345 5,205 2000 0421 1001 125,500 5,240 72 23.3 1,400 2,390 4,775 1,170 6,655 1002 1421 1000 125,790 5,310 74 24.9 1,600 2,665 3,935 1,320 5,810 0001 2422 1000 125,950 5,430 76 26.2 1,580 2,690 3,860 1,320 6,655 2201 0022 1200 126,090 5,590 78 27.5 1,580 2,720 4,190 1,295 6,730 1200 1020 1202 116,280 5,690 80 29.0 1,620 2,920 3,960 1,345 7,135 2200 2020 0202 12NOTE:• N = 9.6” (243.84mm)• Weighs based on 3,660mm plate lengths• All weights include bolts and nuts• All dimensions are to inside of the crest of the corrugation and all figures shown are subject tomanufacturing tolerances as per CSA G 401• 5N, 6N and 9N designate number of hole spaces in plate• T = Top, S = Side, C = Corner, B = Bottom
<strong>MULTI</strong>-<strong>PLATE</strong>_INSTALLATIONFabricated from factory-curved corrugated steel plates, Multi-Plate is afield-assembled flexible soil-steel structure. As with any buried structure,proper installation is critical in providing long-term, worry-free, performance ofthe structure. In practical terms, installation can be broken into three majoroperations:NOTE:<strong>Armtec</strong> Installation Guidelines areprovided as recommendedconstruction practices whenassembling Multi-Plate structures1. Foundation PreparationSoil-steel structures depend upon the inherent flexibility of the steel shell toaccommodate small deflections and fully mobilise the support of the granularbackfill. A compressible soil cushion is installed under the invert of the pipe toallow the corrugations to settle into the granular material while providingsufficient load-bearing capacity to support the pipe, fill, and other applied loads.HaunchesInstallation may be aided by placingthe cushion on a pre-shaped bed forshapes with tight corner or side radii,such as pipe-arch, underpass, orhorizontal ellipse shapes, to providebetter compactionArchesPlates are typically secured to aconcrete strip footingAn <strong>Armtec</strong> supplied unbalancedchannel is anchored to the footing inorder to receive the platesHIGHWAY 99, BC - PREPARED GRANULAR BED