Lattice Girders have been developed for special demands in the field of Tunneling. The system has been extensively tested and used successfully for numerous tunnel projects throughout the world.
Lattice Girders ensure an immediate support in the open span area. Contrary to standard solid-web girders, Lattice Girders are entirely integrated in the shotcrete lining; porous zones and shotcrete spray shadows are avoided.
The load-bearing capacity of Lattice Girders has been investigated in terms of various loading tests and by numerical analysis. Flexibility regarding geometry and bearing capacity characterizes this passive support system for underground applications.
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.