www.concreteinternational.com | Ci | SEPTEMBER 2019 41
rail; its gantry legs are adjustable and can accommodate
varying screed rail widths and heights. Setup does not require
any calibration or preprogramming of reinforcing bar
dimensions; TyBot determines such details on its own.
Before TyBot can get to work, workers must first tie about
10% of the reinforcing bars. TyBot then works to tie the
Operation and Oversight
TyBot is autonomous but not remote controlled; it locates
reinforcing bar intersections and ties them with wire. It is
capable of either tying all intersections or tying in an
alternating-intersection pattern. Powered by a Cummins Onan
QG 5500 EFI Generator Set, each tie takes approximately
3.5 seconds. The machine is capable of tying about 800
intersections per hour, but the tying pattern and reinforcing
bar grid spacing determine the overall speed at which TyBot
works. Tybot is capable of working on grids as small as 4 x 4 in.
(100 x 100 mm), and it can tie intersections comprising No. 8
(25 mm) by No. 9 (29 mm) bars and smaller. Production rate
charts are available at www.tybotllc.com/production-rate-chart.
Units are available for lease or purchase. For leased robots,
a Quality Control Tech (QCT) employed by TyBot, LLC, is
required to be on site while the machine performs its task.
The QCT does not operate TyBot; rather, he or she is on site
to monitor performance, reload the tie wire spool, and handle
any basic maintenance or repairs. Monitoring may be done
through a wireless controller, which also provides the ability
to override the machine’s operation. If a unit is purchased,
training is provided for those who will be overseeing
In addition to freeing up workers, TyBot offers the
potential to condense project timelines because it can operate
in a variety of conditions. It can work day or night, and its
work is not impeded by rain. It does not take breaks, working
tirelessly to finish the task at hand.
Although TyBot is currently used in bridge deck
construction, the company is investigating how to use the
robot in other applications. Potential future project types
include commercial buildings, precast, and roadways.
TyBot became available for purchase earlier this year. To
learn more about the product and to view videos of TyBot at
work, visit www.tybotllc.com.
––TyBot, LLC, www.tybotllc.com
Selected for reader interest by the editors.
TyBot is transported to a jobsite on a trailer
TyBot moves along the existing screed rail
Reinforcing bar intersections are located autonomously