FABRICATION, SAND BLASTING, METALIZING, PAINTING, TRIAL ASSEMBLING, DISMANTLING, STACKING OF STEEL TRUSS/ PLATE GIRDERS LC. NO. 275 AND LC. NO. 276 OF KHURDA ROAD DIVISION

Plate Girder Semi Through Girder/Composite Girder (Fabrication of Steel Work)

The final inspected bridge girder components should be protected by grit/ sand blasting, Aluminium metalized (as per cl.:39.2.1 of RDSO:B1 and as per the RDSO stipulation vide letter No. CBS/MPP/Meeting; dt. 10/04/2014) preceded by surface preparation by compressed air blasting/ centrifugal blasting with suitable abrasive material (as per cl.: 39.201 Appendix VII of RDSO: B1) The metalizing shall be followed by one coat of etch primer to IS:5666, one coat of zinc chrome yellow primer to IS:104 with the additional provision that zinc chrome to be used in the manufacture of primer shall confirm to type -II of IS:51 followed by one coat of aluminium paint to IS:2339. The above Painting/ Metalizing scheme is a brief outline – but these will be guided by all the provisions as detailed in cl. 39.2 and 39.2.1 of RDSO:B-1 along with relevant appendices and other codes mentioned therein. The rate shall include all consumables, metalizing wire, all kind of gases, abbrasive materials, paints, diesel plant machinary, labour lead lift with proper stacking as complete the job. The rate shall also include testing charges of all material like metalizing wire and 3 (three) types of paints . It also include scratch test and measuring of DFT thickness as per provison of QAP and RDSO guideline.

Transportation of painted girder from fabrication work shop to respective sites with truck / trailer including loading with proper wooden packing in-between members and marking of individual member. Material should be sent span wise, in a proper sequence. During transportation proper care should be taken to avoid distortion in painted girder. Any dent in painted girder to be rectified at site by the agency.

Stud shear connector - supplying. 2500Nos manufacturing, fabrication testing and welding with welded by STUD welding machine (with all contractor consumable) compatible with type of STUD on composite steel girder, conforming to IS:3935-1966 of diameter 25 mm and height 200mm and as per RDSO drawing no. RDSO/B-11754/R3& 11751/R3 with all alteration and as pet approved drawing of railway and as per direction of Engineer-incharge inclusive all. The stud should pass the test prescribed in above mentioned drawing.