e4033002 rate contract for supply of mounting structure and ct / pt structure for outdoor breakers as per annexure - a. , galvanized mounting structure , mounting structure and ct / pt structure for outdoor breakers as per annexure - a. vendor to quote rate on per kg basis. structures of different types mentioned in annexure -a will be ordered on number basis and the weight of each type of structure is mentioned in annexure - a. pvc clause will be applicable considering base rate of steel angles 50x50x6 mm, issued by jpc ( average rate of four cities delhi, kolkata, mumbai & chennai has been considered ) is rs 68.88 / kg. ( s. no. 13 ) .