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.
Curvatures range from a minimum radius of 10 times the beam depth for 4" and 6" sections to 14 times the depth of section for larger beams. JENNMAR Specialty Products also fabricates straight beams, forepoling sheets, steel lagging, tie rods, foot plates, and pipe spacers.
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.