PRE-SIZE PORTALS, ETC.
PRE 201 TUNNEL PORTAL, SINGLE TIMBER 3.50
PRE 202 TUNNEL PORTAL, DOUBLE TIMBER 3.75
PRE 203 TUNNEL PORTAL, SINGLE RANDOM S 3.50
PRE 204 TUNNEL PORTAL, DBL RANDOM STON 3.75
PRE 205 TUNNEL PORTAL, SING CUT STONE 3.50
PRE 206 TUNNEL PORTAL, DBL CUT STONE 3.75
PRE 207 TUNNEL ABUTMENT (2), TIMBER 3.75
PRE 208 TUNNEL ABUTMENT (2), RNDM STON 3.75
PRE 209 TUNNEL ABUTMENT (2), CUT STONE 3.75
PRE 210 RETAINING WALL (2), TIMBER 3.75
PRE 211 RETAINING WALL (2), RNDM STONE 3.75
PRE 212 RETAINING WALL (2), CUT STONE 3.75
PRE 213 TUNNEL PORTAL, SINGLE CONCRETE 3.50
PRE 214 TUNNEL PORTAL, DBL CONCRETE 3.75
PRE 215 TUNNEL ABUTMENT (2), CONCRETE 3.75
PRE 216 RETAINING WALL (2), CONCRETE 3.75