Product Catalog

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.

Steel ribs are efficient and safe ground control elements in underground construction. Selection of section type and dimension is accomplished following structural and project requirements. Besides custom-bent steel ribs, straight beams, forepoling sheets, and steel lagging can also be fabricated.

Steel ribs are efficient and safe ground control elements in underground construction. Selection of section type and dimension is accomplished following structural and project requirements. Besides custom-bent steel ribs, straight beams, forepoling sheets, and steel lagging can also be fabricated.

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.