NORTH MAINS 1 HEADING 14 BLOCK TOWARDS 15 BLOCK, 4 WAY INTERSECTION MMU 004 7 FT HIGH BY 18 FT WIDE BY 40 FT LONG. TYPE OF SUPPORT, 6 FT DOUBLE LOCK, 8 FT DOUBLE LOCK, 8"" BY 8"" PLATES, ROOF MA TS, FALL DANGERED OFF, ADDITIONAL ROOF SUPPORTS SET AROUND FALL.