Manhole risers fit metropolitan communityProblem:“We were having problems in the city with cast iron manhole risers,” says Samir Amin, P.E., Milwaukee’s engineer in charge. “They’re usually fine, but on occasion they would slip or rattle out, and that led to car damage and claims — there was definitely room for improvement.”
Solution:Several years ago, Amin was approached by a representative from American Highway Products, who demonstrated the company’s adjustable riser, the Pivoted Turnbuckle Manhole Riser. These sturdy galvanized steel risers feature a turnbuckle and are precisely sized to order. Using a screwdriver as a lever, the turnbuckle transmits thousands of pounds of force to the flexible rim, seating
