MULTI-PLATE PRODUCT GUIDE - Armtec

MULTI-PLATE_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:Armtec 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 Armtec supplied unbalancedchannel is anchored to the footing inorder to receive the platesHIGHWAY 99, BC - PREPARED GRANULAR BED