PROFILED STEEL LINING 
Type series: OS3-120, OS3-125, OS3-130, OS3-135, OS3-140, OS3-145 
Type series: OS4-120, OS4-125, OS4-130, OS4-135, OS4-140, OS4-145
  • profiled steel linings type OS are used in underground headings  classified as "a", "b" or "c" , methane explosion hazard level and class A or B coal dust explosion hazard
  • profiled steel lining of the OS type is intended for making ceiling and sidewall lining protecting against rocks falling into mining excavations with a door spacing of up to 1.0 m from KS/KO 21, V21, V25, V29, V32, V34 and V36 sections: Profiled steel linings are mainly used in long-maintained headings.