GE/SRA/T-23/2026-27

Dismantling of Plain or corrugated steel sheeting, any gauge, thickness, including Nainital or similar pattern roof coverings and removal from site complete all as specified and as directed.

Dismantling wrought iron or mild steel work of any description in rafters, purlins and wind ties wtc and removal from site complete all as specified and directed. NOTE: If the planned MS structure, truss, etc is different from the existing structure, proper measurement of the existing structure to be demolished, shall be recorded in MB duly signed by the Engineer-in-Charge.

M&L for steel work in tubular trusses including special shaped washer etc complete using ERW or induction butt welded tubes conforming to IS 1161-1979 grade St-240 or RHS/SHS Sections conforming to IS 4923:1997 grade YST 210 complete all as specified and directed. (NOTE: Quoted rates shall be deemed to include for cutting to dead length where required, notching, drilling, fitting, riveting and/or welding or connecting with bolts and nuts (including rivets or bolts and nuts), providing and fitting angle cleats, fish plates, gusset plates etc., also for wedging, plumbing, truing up and fixing complete. No extra measurement for the same will be considered except for base plates at top & bottom of columns)

M&L preparing new or previously untreated Steel and Iron Surfaces of any description, over 10 Cm width or girth and applying Two Coats of Synthetic Enamel Paint (First quality) over a Red Oxide Zinc Chrome Primer, for MS tubular truss incl all scaffolding and safety measures complete all as specified and directed.

S&F 0.50 mm thick TCT (Total Coated Thickness) pre-painted galvalume sheets with minimum base metal thickness of 0.45 mm, single skin high rib/multi rib profile sheeting having 1000-1020 mm cover width and 28-30 mm high crest at maximum 250-255 mm pitch (centre to centre), manufactured from high tensile galvalume steel conforming to minimum tensile strength of 550 MPa, coated with AZ-150 zinc-aluminium alloy coating comprising 55% aluminium, 43.5% zinc and 1.5% silicon with total coating mass of 150 g/sqm on both sides, having minimum 5 micron primer coat and camouflage pattern PVDF/SMP paint finish on exposed face with total top coat thickness not less than 20 microns and minimum 8-10 micron backer coat on reverse face, complete with wide pans incorporating minimum three stiffening ribs for effective water shedding and special male/female interlocking side laps with full return legs for purlin support, fixed with self-drilling/self-tapping screws and EPDM washers as per existing roof profile complete all as specified and directed. NOTES:- (1) The exposed surface of the roofing sheets shall be finished in camouflage pattern as per the latest Sigma pattern approved/generated by the Air Force Station. The camouflage pattern shall comprise 4 to 5 colour shades with RGB values generally varying between 110 and 171 or as directed by Engineer-in-Charge, applied in suitable proportions to achieve the desired camouflage effect. The contractor's quoted rate shall be deemed to include supply of all paints, primers (where required), labour, masking, pattern development, application and all incidental works necessary for complete camouflage finishing of the roof. No extra payment whatsoever shall be admissible on this account. (2) The quoted rates shall be deemed to include the cost of all tools and plants (T&P) such as scaffolding, ladders, ropes, welding and cutting equipment, drilling machines, safety harnesses, lifelines, helmets and all other necessary safety gear and protective measures required for execution of the work at all heights, including working at heights up to 15 metres above ground level or as actually required at site. (3) The quoted rates shall also be deemed to include all fixing accessories, consumables and incidental items such as self-drilling screws with EPDM washers, G.I. anchor bolts, nuts, bolts, cleats, screws, rawl plugs, sealants, welding electrodes, fasteners and all other materials required for proper completion of the work in all respects, including incidental cutting, drilling, welding, removal of minor welded or bolted connections, safe lowering, stacking and removal of dismantled materials from site. (3) The contractor shall ensure adequate safety arrangements for all personnel engaged in the work and shall be solely responsible and liable for the safety of his workmen during execution, dismantling or installation operations. The Department shall bear no responsibility for any accident, injury or loss of life, and the contractor shall indemnify the Department against all such claims or damages.

Demolition Brick work built in Cement Mortar and in any Position including all Quoins, Arches and Pillars, etc., and removal of debris outside AF land complete all as specified and directed.

M&L for Brick Work with Fly-Ash Bricks (Old Size Bricks), Straight or Curved on Plan exc. 6.0 Metre mean Radius, built in Cement Mortar 1:6, complete all as specified and directed.

M&L Brick work using Serviceable Bricks obtained from Item No. 21 here-in-before including removing old Mortar, Straight or Curved on Plan exc. 6.0 Metre mean Radius, built in cement mortar 1:6, complete all as specified and directed.