DYWIDAG-Systems International (DSI) is America’s leading manufacturer & supplier of specialist ground support products to the underground coal & metalliferous mining sectors. They also are one of the suppliers of hollow core or self-drilling soil nails.
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Stone Strong
Stone Strong is the largest precast retaining wall block available on the market measuring 3′ by 8′, weighing 6,000 lbs. This block is not misplaced easily. Visit Stone Strong
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Limitstate:GEO
LimitState:GEO is truly unique software which allows users to easily and rapidly analyse geotechnical stability problems of almost any type – including combined problems simultaneously involving slope stability, retaining walls, footings and tunnels. Visit Limitstate:GEO
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Hatch Mott MacDonald
A full service engineering firm with much experience in tunneling. Visit Hatch Mott MacDonald