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MARCH
2008
|
15
moderncontractorsolutions.com
4.5-inch slump concrete. Again Ruttura
turned to Somero for a solution. He had
never considered buying the Somero
PowerRake
®
before because it just
didn't seem to him that it could make
a difference. But this time he gave it a
second look.
"We knew we would really struggle
raking this thick, heavy concrete that
contained big stone (size eight and up
to 1.5 inches) by hand. Once we saw
the PowerRake in action during a demo
on the job, we changed our minds,"
notes Ruttura. "It can really move the
concrete--it's very quick and agile
scurrying around in the concrete, yet
still powerful, and we could cut the
number of laborers needed for raking
in half."
With the labor rates in New York,
Ruttura says the payback there is faster
than in other areas of the country. Any
reduction in labor needed for a job
increases his bottom line because New
York labor rates run from $700 to $800
per day, per laborer. As compared to
doing the work by hand, there was a
25-percent reduction in labor by using
the combination of the Copperhead
and PowerRake to place and finish the
million square feet of concrete at Bronx
Terminal Marketplace. Even in smaller
markets, the PowerRake can still pay
for itself quickly when the efficiency,
reduced labor, and reduced workers'
compensation claims are factored into
the equation.
"We placed 250,000 square feet,"
Ruttura says. His original skepticism
about the laser-guided PowerRake
machine's ability to push and pull
large piles of concrete has turned into
cheerleading for this 13.5-horsepower,
ride-on workhorse that can place
concrete to plus or minus ¼-inch
accuracy. Using the equipment can
also mean using less hose since it can
distribute piles of concrete into the
farthest corners of a job. Working ahead
of the CopperHead enabled Ruttura's
men to achieve a much flatter strike-off,
and they were able to realize the F
L
-
Numbers in the high 20s that he needed.
Continuing use for
a Quality solution
At the same time as the Bronx Terminal
Marketplace project, Ruttura & Sons
Construction was starting a job for
The New York Times, building its new
printing press facility in Queens, New
York. They brought their new equipment
to that jobsite as well, and it made a
huge difference on the speed, reduced
need for labor, and overall accuracy of
that job, enabling them to achieve even
higher F
L
-Numbers than before.
"We would have worn the men out
since we were placing 20,000 to 25,000
square feet of concrete per day," Ruttura
says. "We used only four laborers as
opposed to almost 20 laborers that would
have been needed if the work was done
by hand. But the consistency of our
F
L
-Numbers was key--you can't have
consistently high F
L
-Numbers without
laser-controlled equipment, and F
L
numbers are crucial for warehouse floor
specifications."
Ruttura is currently working on
Citifield Stadium, the new Mets stadium
that is replacing Shea Stadium, and the
U.S. Tennis Association Arthur Ashe
Stadium, also in New York. In every job,
Ruttura's goal is to get the concrete close
to grade and then screed it precisely on
grade, efficiently, with reduced labor and
consistently high F
L
-Numbers.
What are f-numbers?
The F-Number System is the American Concrete Institute and Canadian Standards Association
standard for the specification and measurement of concrete floor flatness and levelness. The
standards include two F-Numbers: F
F
for flatness and F
L
for levelness.
Flatness relates to the bumpiness of the floor, while levelness describes the tilt or pitch of the
slab. The higher the F-Number, the better that characteristic of the floor. Warehouse-style stores
specify high F-Numbers for their floors to ensure the integrity and stability of the tall shelving
used throughout the store.
The patented Somero
®
PowerRake
®
2.0 can rake concrete on subgrades or
over chaired rebar.
The patented Somero
®
CopperHead
®
XDTM 3.0 Laser Screed
®
can achieve
high FL numbers even when used over chaired rebar or poor subgrades.
UK +44(0) 1246 269 741
US 906-482-7252
Page 7
We knew we would
really struggle raking this
thick heavy concrete... by hand.
The PowerRake
®
changed our minds..."
"It can really move the concrete ­ it's
very quick and agile
scurrying around in the concrete,
yet still powerful,
and we could cut the number
of laborers needed
for raking in half.
~
Ruttura & Sons Construction Co.
New York
14
|
MARCH
2008
moderncontractorsolutions.com
PROJECT
PROFILES
R
uttura & Sons Construction
Company grew from a small sidewalk
and curb contractor in Freeport,
Long Island, to a $61-million, full-service
construction company by approaching
challenges as opportunities to grow.
Celebrating its 90
th
anniversary this year,
Ruttura & Sons now works in demolition,
excavation, storm drainage, sanitary
systems, water services, and all phases of
cast-in-place concrete construction for the
greater metropolitan New York area.
No stranger to high-profile construction
projects, last summer Ruttura & Sons
began work on the Bronx Terminal
Marketplace reconstruction project across
from Yankee Stadium in the Bronx,
New York. This massive, $500-million
Gateway Center project that will include
retail and restaurant space is expected
to last approximately 48 months,
including demolition of old structures and
environmental remediation to address the
contamination of the soil and existing
foundations.
The entire area around Yankee Stadium
included in the rehabilitation project posed
challenges due to the contaminated soil of the brown fields
and contaminated foundations. But the greatest challenge for
Ruttura was the requirement to incorporate existing flooring
in the proposed four-story, 1-million-square-foot structure, and
have it meet the high F
L
numbers specified for incoming stores
like Home Depot and BJ's Wholesale Club.
"We knew that the floors needed to have F
L
-Numbers in the
low 30s or high 20s," says Tommy Ruttura, president of Ruttura
& Sons. "But we had not been able to achieve F
L
-Numbers
greater than about 18 when we screeded by hand, and for this
job we couldn't use the large Somero
®
Laser Screed
®
over
the rebar."
Ruttura had bid this job competitively based on pouring large
volumes of concrete (1,000 cubic yards) per day. In addition,
the job required very heavily reinforced concrete, 12 inches to
18 inches thick with double mat number seven rebar, chaired
up 6 inches on center. Pumped in through slick line hose, it
would necessitate a lot of labor to move and rake 1,000 yards of
concrete day in and day out. Aside from wearing out his crew,
Ruttura knew there was no way his crew could make consistent
F
L
-Numbers by hand for such a huge area.
Because Ruttura & Sons had been using the Somero S-240
Laser Screed (an older version of the more powerful SXP Laser
Screed) for many years, they were used to the laser-guided
accuracy consistently achieved with a Laser Screed. They
were aware that Somero also had a smaller Laser Screed, the
CopperHead
®
, which is light enough for metal deck and has
a 10-foot head that controls grade seven times per second
while it cuts, screeds, and vibrates the concrete in one pass.
This seemed like an answer to part of the dilemma, but there
still was the chore of having to rake huge volumes of thick,
ContraCtor Meets striCt
speCifiCations With neW
high-teCh equipMent
By Susan Chadwick
Susan Chadwick is the senior marketing writer for Somero Enterprises, Inc., a leading
manufacturer of technologically advanced concrete placing equipment and associated
machinery. For more information, please visit www.somero.com.
Tommy Ruttura is the president of Ruttura & Sons Construction Company and a past
president of the American Society of Concrete Contractors (ASCC). Ruttura & Sons
is one of the largest concrete and excavation contractors in the greater New York
area. For more information, please visit www.ruttura.com.
About
the
Author
PowerRake
®