NORTH MAINS 68 BLOCK #5 HEADING 4-WAY INTERSECTION MMU 003. 12 FT HIGH X 18 FT WIDE X 20 FT LONG. TYPE OF SUPPORT: 6 FT RESIN - 6"" X 16"" PLATES, 12 FT CABLE - 8"" X 8"" PLATES, ROOF MATS. FALL D ANGERED OFF, ADDITIONAL ROOF SUPPORTS SET A ROUND FALL.