Masonry Magazine February 2003 Page. 30
Retaining Wall
SYSTEM
Pisa2 Terraced Driveway for flexible designs.
Angelo Risi
Founder of Risi Stone Systems
The result was well received and, over the years, Risi and his brother Tony bought out their uncle and created Risi Stone Manufacturing, Thornhill, Ontario. "We couldn't afford to buy the factory so we just rented it and bought the company's assets," Risi says. "We started making retaining wall systems, as well as continuing some products that our uncle was making at the time. Within about five years we had started developing different types of retaining wall systems, in our own plant; more the machine-made type as opposed to the wet cast form."
The idea of solid, high-strength concrete units that interlock with a continuous tongue and groove to form a flexible, stable dry-stacked retaining wall system might seem simple now, but in the late 1960s, it was unheard of. Pisa Stone is, therefore, the forerunner of the segmental retaining wall (SRW) unit and still a leader in that niche market.
DuralHold2 Installation.
28 Masonry
February 2003
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