NORTH MAINS, 92 BLOCK, #8 HEADING, MMU 004, 4 WAY INTERSECTION. 12' HIGH X 18' WIDE X 20' LONG. TYPE OF SUPPORT: 6' TENSION RESIN BOLTS, 6"" X 16"" PLATES, ROOF MATS, 12' DOUBLE LOCK BOLTS. FALL AREA DANGERED OFF. ADDITIONAL SUPPORTS SET AROUND FALL.