across
parts
of
Michigan’s
Lapeer County. With such a dis- tance to cover, Zito is installing extremely long 50-foot joints of pipe. This brought up the big- gest challenge for the veteran underground utility contractor; how do you shore a trench to install 50-foot sticks of pipe?
For help with designing a trench protection system, Zito turned
to their go-to source
for underground safety-related equipment—Mid-Michigan- based Efficiency Production, the nation’s leading manufacturer of trench shielding and shoring.
“It’s actually not as hard as you might think,” assured Mike West, Efficiency Production’s Vice President of Engineering. “We’ve
built several custom
trench shields in the past ex- actly
for the same purpose, shoring the installation of joints of pipe 50 feet or longer,” he said. “The key is designing a (trench) box with enough pipe clearance and length so the contractor can angle the pipe into the box,” West explained.
CUSTOM TRENCH BOXES WITH HIGH-CLEARANCE ARCHES PROVIDE PLENTY OF ROOM FOR PIPE INSTALL
Efficiency’s solution is accom- plished by manufacturingtwo
Zito is installing 50-foot long sections of 60-inch diameter steel spiral-weld pipe 13 miles along the main transmission line of the KWA pipeline project. The boundaries of the new water supply will encompass over 2,400 square miles and over a half million people.
trench shields with custom
high-clearance arches, in- stead of spreader pipe on the abutted ends of the boxes. This results in almost 60 feet of space with more than 11 feet of pipe clearance–plenty of room for Zito’s excavator operator and crew to angle the spigot end of the pipe into the connected boxes and up to the bell end of the installed pipe.
“The shields we built for Zito, however, are different in that the lead box is so much longer than the trailing box,” continued West. “What you end up with is a lot of space to get the pipe into the front box and under the arches, and then just enough space in the second box to shield the connection work,” he said.
“The box is working well,” as- sured Zito. “Our record is 11 sticks of pipe in one day,” he added. “Yeah, the box is work- ing very well. We’re anticipating
being finished installing this
section of the pipeline by June 2016,” Zito said.
The new KWA pipeline will sup- ply treated and untreated wa- ter to the municipalities of the region, industrial customers, agribusinesses, rural agriculture developments, and residential commercial light and heavy manufacturers. The boundaries of the water supply will encom- pass over 2,400 square miles and serve over a half million people.
James McRay is the Director of Marketing & Media
for
Efficiency Production, Inc. He can be reached at:
jmcray@efficiencyproduction.com
48
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