BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

18.5.8 Metal Works(1) GeneralThe metal works will include handrails, drain pipes, steel ladders, step ladders,cable duct hatch cover plate, removable hatch cover plate, rain water leader, airduct, louver and others. Prior to fabrication work drawings and quality ofmaterials shall be submitted to the Board for approval.(2) MaterialsThe materials to be used in the Works shall be free from defects and conform toJIS Standard or relevant Standards approved by the Board.(3) WorkmanshipAll plates and sections shall be true to form, free from twist and straightenedbefore any fabrication work is started on them. The works of cutting, fabrication,welding, installation and painting shall be done in accordance with thisSpecification and relevant Standard. If difference quality metals are in contactwith each other, these contact surfaces shall be separated by means ofbituminous paint, felt strip, rubber sheet and other material to be approved by theBoard.18.5.9 Floor-laying(1) PVC FlooringPVC flooring shall be heat resisting vinyl tiles obtained from an approvedmanufacturer. The tiles shall be not less than 2.4 mm thick and laid by anspecialist to a jointing layout approved by the Board. A matching PVC cove-typeskirting is to be used in conjunction with the floor tiles. The tiles and skirting shallbe laid on a flat, clean concrete floor, in strict accordance with the manufacturersinstructions, using the recommended adhesive.(2) Unglazed Vitreous Ceramic TilesThe tiles shall be plain and of manufacture and colour approved by the Board.The tiles shall be laid by experienced craftsman, on a concrete slab accuratelyformed with a true, smooth surf ace. Joints shall be accurately aligned in bothdirections and matching covered skirtings. Expansion Joints shall be the samewidth as tile Joints, approximately 5 mm, and filled with approved filling material.The surface of the base shall be cleaned of all dirt, grease, grit, etc. and the tilesshall be dry and clean.(3) In-situ TerrazzoIn-situ terrazzo paving is to consist of2 1/2 parts 6.5 mm 9.5 mm approvedmarble chippings, clean and free from dust, mixed with one part of "concrete" or"snowcrete" or approved equivalent according to the background required. Theterrazzo shall be laid by a specialist.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)203