Product Catalog

4-flange liner plates manufactured by Jennmar Civil are available in 16" and 24" widths as corrugated or smooth plates. Liner plates are formed from one piece of steel to provide longitudinal and circumferential flanges with optimum load-bearing and bending resistance characteristics.

Used in new mining and tunneling excavations and rehab of existing tunnels, entries, and underground spaces. Comprised of cold formed or rolled and cut-to-length Wide-Flange Beams fabricated into segments, tied together with tie rods and pipe spacers on 4 or 5 feet centers.

J-Channel Beams, Wide Flange Beams & Heat Treated Serrated Steel Beams (Waffle)

The channel sections are specifically designed for use with structural members and ease of installation. The sections and materials used is design for efficient installation and transportation to the tunnel location.

Various steel sets that are protected with JENNMAR's IRL panels have been approved by MSHA and installed in several underground roof fall rehabilitation projects.

JENNMAR Overcast Systems are designed to be modular reusable structures that are used in underground high-pressure situations to insure intake air is not contaminated with return air.

Look to Jennmar Civil for quality USA manufacturing and development of ground support elements. We provide designs and products for Lattice Girders used in SEM/NATM construction.

JENNMAR's array of props are easy to transport and install. They provide reliable support and help maintain the integrity of the mine roof. JENNMAR manufactures a full range of prop configurations with a variety of pre-load and yield options to meet your mine's specific requirements.

JENNMAR, in conjunction with our sister affiliate engineering company, JENNMAR Engineering can custom design arch and square set support systems as well as tunnel and shaft rings.

The TH Arch system has quickly gained wide market acceptance by uniting high resistance to load along with dynamic behavior that is unseen in other arches in the industry.

Jennmar Engineering has designed, tested, and developed the Impact Resistant Lagging (IRL) system to protect steel sets. Various steel sets that are protected with IRL panels have been approved by MSHA and installed in several underground roof fall rehabilitation projects.

JENNMAR Civil offers 2-Flange Liner Plate that provides optimum shaft stability and protection when constructing new utility tunnels, relining structures under highways and railroads, and lining vertical shafts.