rate contract for supply of interphase house with door assy (2 types) , rate contract for supply of interphase house (02 types) for 18 months from approval at bhel, bhopal. evaluationshall be doen itemwise. , interphase house with door assy (pvn12b) to drg.no. 15217001571 - var. 00, rev. 03 on fully finished basis. pvc factor of steel is 1:47. base rate of 1mm thick cr coil of steel, issued by jpc is rs 55.92/kg. (average rate without gst of four cities delhi, kolkata, mumbai & chennai has been considered) , assy. of interphase mech. (pvn36) to drg no 15213030591-v03 rev.11 on fully finished basis. pvc factor of steel is 1:94.25. base rate of 1mm thick cr coil of steel, issued by jpc is rs 55.92/kg (average rate without gst of four cities delhi, kolkata, mumbai & chennai has been considered).