Kidder Concrete Cutting and Coring, Inc. Kidder Concrete Cutting and Coring Inc. Plaistow NH wall sawing slab sawing core drilling grooving



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Core Drilling

Typical Applications:

Floor and sewer drains
Sewer tie-ins
HVAC openings
Plumbing and electrical lines

Kidder Concrete Cutting and Coring, Inc  Core Drilling Services

Core drilling techniques are used when precise, circular cuts are needed. Holes of almost any diameter are easily drilled to make openings for plumbing, electrical and HVAC installations. Core drilling is also commonly used to create holes for routing cables or placing anchoring bolts, installing load carrying devices or dowel bars, or for concrete sample analysis.

A core drill bit consists of a steel tube with diamond segments brazed or laser welded on the drilling end. The core bits are mounted on the rotating shaft of various types of drilling machines. Core drills can be operated in any orientation, vertical or horizontal. Core drill machines can be powered by electric, hydraulic or air power sources. Core drill bits can range in diameter from 1/2 - 60 inches (13 - 1524 mm) and drilling depths are virtually unlimited with the barrel extensions.

Core drilling played a major part in a hospital renovation in Halifax, Florida. A CSDA contractor was hired to remove a 20-foot by 20-foot by 4-foot (6.1 x 6.1 x 1.2 m) tower crane footing that had been left behind when the hospital was originally built. Three electric drills were used to line drill 355 6-inch (152 mm) diameter holes to a depth of 4-foot 6-inches (1.4 m). Line drilling is a process whereby the holes are drilled one next to another in a line. This process was used to partition the footer into 4-foot by 4-foot by 4-foot (61. x 61. x 61. m), 6-inch (152 mm) sections weighing approximately 11,000 lb. each. A total of 355 holes were drilled in 10 days. This project utilizing core drilling allowed the renovation to be completed within budget; allowed undisturbed use of the existing facilities; and demonstrated the advantages of today's diamond tool cutting techniques as used by a professional CSDA cutting contractor.

(description of core drilling partially provided by: Concrete Sawing & Drilling Association)


Concrete Cutting & Coring, Inc. 22 Danville Road Plaistow, NH 03865

phone: 603-382-1799 toll free: 1-800-792-5572 fax: 603-382-2411

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