JENNMAR

JENNMAR Asia (China)
Asia (China)

JENNMAR Australia
Australia

JENNMAR Europe
Europe

JENNMAR Latin America (Chile)
Latin America (Chile)

JENNMAR South Africa
South Africa

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About Us
 

History of JENNMAR

 

Mary and Frank Calandra, Sr., parents of JENNMAR’s two common stockholders, Jack Calandra and Frank Calandra, Jr., originated Frank Calandra, Inc. as a proprietorship in 1922. JENNMAR was incorporated in 1965, but from 1922 until 1972 the company was engaged in various businesses related to the coal mining industry.

Frank Calandra, Jr.

In 1972, JENNMAR began to change the primary focus of its business to the manufacturing of roof support systems for coal mines. Today, JENNMAR's reach extends around the globe and into the tunneling and civil construction industries as well.

1922

Frank Calandra, Inc. originated as a proprietorship

1972

Began to change the primary focus of our business to the manufacturing of roof support systems

1975

Continued to grow with the introduction of our first specialty bolt, the COMBINATION® Bolt

Began construction and operation of our West Virginia plant

1978

Expanded with manufacturing facility in Winchester, Kentucky

1981

Acquired Valley Steel’s mine roof bolt manufacturing plant in Flora, IL

1985

Received patents on the INSTáL® Bolt

1986

Gained access to the western region’s coal producing areas through the acquisition of a local mine roof bolt manufacturer in Helper, UT

1992

Expanded our facility in Winchester, KY

1993

Opened a new manufacturing facility in Clearfield, UT

Began construction of facility in Tazewell County, VA

1995

Became associated with cable bolt and cable truss technology

Expanded our roof support systems manufacturing facility in Reedsville, WV

1997

Established a manufacturing facility in Sydney, Australia

1999

Began construction of a 130,000 sq. ft. steel service center adjacent to the Nucor Steel Mill site in Berkley County, SC

2002

Looking toward Asia for future production

2003

R&D department launches Prop Program

2006

JENNMAR China produces first roof bolt for Asia market in August

Affiliate company, J-LOK begins producing its own line of specialty resin for JENNMAR bolt systems

2007

JENNMAR Specialty Products begins production

2008

JENNMAR West Kentucky and J-LOK Corporation in Earlington Kentucky are commissioned

JENNMAR Australia moves into modern roof bolt complex in Narellan, Australia

J-LOK Australia offers a line of resin to complement JENNMAR Australia’s products

JENNMAR Canada project begins

2010

JENNMAR Canada moves from a small leased space to our new 50,000 square foot building in Sturgeon Falls, Ontario

JENNMAR opens a manufacturing facility in Santiago, Chile, known as JENNMAR Latin America, and sales offices are formed in Mexico, Peru and Spain

JENNMAR Europe places sales offices in Gijon, Spain

2011

JENNMAR completes purchase of Merol, Poland’s largest independent ground support provider to coal and hard rock markets

2012

Acquires MultiTex in the Czech Republic, further expanding JENNMAR’s hydraulic expandable rock bolt capacity

2013

Acquires half of Rocbolt Resins expanding resin technolgy to the South African Mining Community


 

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