Large Diameter Boring Attachments
Large Diameter Boring Attachment (LDBA) is a full-faced machine with a rotating cutting head for excavating the soil and is similar to a Tunnel Boring Machine (TBM). The cutting head rotates and excavates the soil, which comes inside the pipe through the openings in the cutting head. An auger system is used to carry the spoil to the jacking pit.

Line and grade is monitored by using a laser beam. The laser is set-up in the back of the jacking pit and it travels above the boring machine and below the top of the pipe and through the pipe to a target that is setup near the front of the machine. The LDBA operator sits behind the cutting head and monitors the target and makes the necessary adjustments using the hydraulic rams to keep the tunnel on line and grade.

We manufacture LDBAs from 36 in. to 120 in. diameters.
Barbera Utility Contracting Inc. dba Horizontal Holes
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P.O. Box 5886 Pinehurst, NC - 28374 • Phone: 910-944-1670 • Fax: 910-944-1677 • Email: info@horizontalholes.com
Copyright © 2007 Barbera Utility Contracting, Inc. dba: Horizontal Holes
Line and Grade Steering Systems
Horizontal Equipment offers a patented line and grade steering system developed by Leo Barbera and designed for durability and ease of operation. These steering heads have the capability of steering the pipe in any desired direction. The grade is monitored using a water level, which is an integral part of a bore while the line is monitored by using a sonde on the nose of the steering head. Once the line and grade are determined any corrections are made by turning the steering rods in the  launching pit.

Our systems have been tested and proven to be highly effective on many jobs that we and others who use our system have done in the past.

Ask the man who has one!
Grade Steering Systems
Horizontal Equipment offers a patented grade steering technology developed by Leo Barbera and designed for durability and ease of operation. These steering heads are designed with bearings in the hinges and steering knuckles and as an option can have torque reduction gear boxes mounted on them. Even at distances of 500 ft it is possible to turn the head with an ordinary ratchet.

These patented steering heads have been in use for a long time and have proved themselves in the field. Bores as long as 540 ft have been accomplished.
Our Products
At Horizontal Equipment we strive to acheive excellence in the products we provide. We are one of the pioneers in the field of horizontal earth boring and we continue to set standards through research and innovation. Our products have been developed through years of experience and meticulous testing.
Water Levels
Horizontal Equipment offers water levels for accurate monitoring of grade during a bore. A sensing head (included as a part of our steering systems) installed at the head of the casing is connected to a 1/2 in. water line that runs the entire length of the casing and connects to the water level.
250-Gallon Bentonite Mixing Unit
At Horizontal Equipment we manufacture a specialized form of a bentonite mixing unit to dispense bentonite slurry to the head of the casing. Appropriate means of transmission of slurry are installed along the entire length of the casing. While the mixing mechanism in the unit keeps the bentonite slurry at the right consistency at all times, a pump provides adequate pressure to transmit the fluid to the head of the casing.
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36" Boring Machine LocoMotion
36" Boring Machine LocoMotion