Military Engineer Services Tender

(l) Each drive leaf is to be fitted on the inside face with an audible and a visual alarm. The alarms are to operate for a short period before a drive leaf starts to move. Interlock switches are to be fitted to any access covers for drive units and electrical control panel doors, to prevent their drive leaf being used while these are open. (m) Each leaf shall be provided with suitable nos of cleats at Top & Bottom designed of suitable dimension which shall be capable of withstanding the weight of the door including incase rollers become free/ fails /break then door shall not fall from its rails. (n) minimum of 90% of the door design, fabrication, and construction must be completed in the factory to ensure quality control and precision. (o) The detailed specifications of hangar door including that for electronic/mechanichal drive system for each door panel shall be as per hangar door manufacturer. Design shall be submitted by the lowest bidder after acceptance of contract and vetting of the design from third party (IIT/NIT) will be done before execution of the work. Hangar door to be installed wtihout disturbing the existing structure. (p) Hangar Door Manufacturers must submit at least one direct order copy or work completion certificate from the Military Engineering Services (MES) in the financial year 2024-25. (q) Hangar Door Manufacturers must furnish documented proof of performing and installing a minimum of 8 No's of motorized sliding hangar doors in the financial year 2024-2025. (r) Manufactured products will be inspected at the factory before dispatch to the site.

Dismantling of structural steel work including complete hanger door(08 Nos), iron wheel, channel, angle, CGI sheet, ISCR (Indian Standard Crane Rail), roller made of cast iron, safety angle and beam, flat iron etc, complete all as specified and directed by Engineer-in- Charge.

(h) All MS structural members of the sliding door undergo sand blasting process (SA 2 1/2 Level) and then are applied with a 4-stage C5M coating process. Zinc rich Epoxy primer coat 50 microns Epoxy MIO intermediate 100 microns Epoxy HB coating 100 microns Polyurethane Finish HB 100 microns total coating thickness of approx. 350 microns has to be applied after in house sand blasting treatment paint has to be an atmospheric corrosivity category of C5M in accordance to ISO 12944. The testing and inspection of the paint is in accordance to EN ISO 12944-7. The durability of C5M against corrosion has to be more than 15 years. (i) weather sealing system for the sliding doors must be designed in conjunction with the cladding system to minimize sand ingress in particular, all vertical joints between leaves on adjacent tracks and the two end jambs are fitted with twin tapered EPDM wiper seals set in aluminum extrusions. At the bottom, each leaf is to be fitted externally with a heavy-duty nylon brush seal, which is retained in aluminum extrusions. (j) Heavy duty energy absorbing buffer stops are to be fitted at the extremities of the bottom tracks to prevent leaves over-running the ends of their tracks during towing / manual mode operation. These are to be designed to eliminate any trip hazard that might otherwise occur. At the end of Top tracks mechanical stoppers are provided.

EPU Top Coat : Top coat of Epoxy-Polyurethane (EPU) top coat shall be supplied in preweighed packs and ready to mix and use which will consists of resin, hardener, EPI (colour concentrate) and formulated aggregates to be mixed Resin & Hardener in the pre weighed ratio, add EPI colour (colour concentrate) and formulated aggregates to agitate the thickness of 1mm thick, then deaerate by using spike rollers and to allow to cure for a minimum 48 hours before the trafficking is commenced. EPU based floor toppings offer excellent abrasion resistance, flexibility, chemical resistance and fast curing properties. lt’s a multi-polymer hybrid of epoxy and combined to impart the optimum properties. (FLOORTOP 1000)

Dismantling plain or corrugated steel sheeting, any gauge, thickness, including Nainital or similar pattern roof coverings.

S&F TMT bars 10mm dia and over, cut to length bent to shape required including cranking, bending spirally for hoping for columns, hooking ends and binding with and including mild steel wire (annealed) not less than 0.9mm dia or securing with clips complete all as specified and directed.

Material and labour for 100mm thick PCC 1:2:4 type B-1 using 20mm graded crushed stone aggregate as in flooring, finished even and smooth using extra cement, complete all as specified and directed.

Material and labour for applying two coats of synthetic enamel paint over and including a coat of red oxide primer, on new steel surfaces over 10cm width or girth, including preparation of steel surface, complete all as specified and directed.

(a) The Hangar door should have dual of mode of operation:- (i) Motor/Electronic mode with bi-directional confriguration (ii) Manual overide Mode. Suitable motor power operation, each drive door leaf shall be fitted with its own drive unit. 3-Phase Electric Motor of suitable rating shall drive each drive leaf depending on site requirement with IEC classification IP55 or above & minimum thermal protection of 155(F). The drive transmission between the motor and the drive wheel shall be through a chain-sprocket assembly. Drive units should comprise a squirrel cage motor with integral magnetic brake and a high efficiency helical-bevel or helical-worm reducing gearbox, driving the bottom wheels through a roller chain.motor drive system must be of european make Each drive unit shall be fully enclosed in a removable casing (Trap Door) which is easily accessible from the inside of the hangar via hinged or removable access covers. Drive unit access covers shall be interlocked so that the leaf cannot be driven under power unless all are closed.Power is to be transmitted to each drive door leaf by means of an enclosed duct type overhead conductor system(Bus bar system). Each drive leaf shall draw a pick-up trolley through the conductor system(Bus bar system). The conductor system(Bus bar system) shall be rated to IEC classification IP44 as defined in EN 60529:1992 and shall be capable of operating satisfactorily in maximum anticipated temperatures underneath the canopies In the event of manual operation is required, a simple system which allows towing operation by powered vehicle e.g. fork truck / with a team of two to four members depending on size of the door & weight.

Repairing of Cracks/Pot Holes/Undulation : Surface areas where minor cracks and potholes are observed it should be covered or filled in should be absolutely dry, clean and devoid of dust, oil loos floor particles, old paint, tar etc. These damaged areas to be filled or levelled with an instant concrete repair compound consisting of a specially developed EPU based Resin and Hardener which can be used for immediate repairs for worn out floors and pavements. This EPU based Resin, Hardener and grey coloured aggregates to mixed thoroughly with the aid of mechanical stirrer for 5 minutes. Lay the mix with a trowel and level it smoothly. Material to be used for repairing of cracks, potholes and worn out areas should be fast setting, no water curing, and higer compressive strength than concrete, thermally stable and water resistant.

Material and labour for Formwork to sides of concrete foundations, footings, bases of columns, raft and raft beams, sides and soffits (if any) of foundation and plinth beams; and similar work; vertical or to batter work in rough finished flat surfaces of concrete

(c) Design of hangar door should be approved and vetted by IIT/NIT before starting of the work. (d) GA/Structural dwg of door hanger door, top tracks and bottom rails including RCC/PCC section below the bottom rails to be submitted before starting of the work. (e) Operation and maintenance training to be given by the executing agency and shall provide 3 copies of “Operation and Maintenance Manual”, written in English language (f) A pass door / wicket door shall be provided of approximate size 1000mm x 2100mm to enable personal access. Personal door shall be provided with safety sensor system to prevent Hangar Door leaf operation when personal door is open. The door cladding shall be of same as the the door-leaf cladding.

Primer : Primer will be applied which shall be a two component, solvent-free, epoxy-polyamido amine system having a volumetric ratio of mixing of 1:1 to yield thickness of 100 microns. Primer coat is a thin mild coating which penetrates into the concrete and forms and cohesive bond. Primer provides excellent adhesion of the concrete /cementitious substrates. Primer shall be allowed to cure for 6-7 hours.(Cipoxy 17 of Cipy Polyurethanes PVT Ltd or Equivalent as approved by GE)

Material and labour for forming 12mm thick Expansion joints in 200mm thick cement concrete filled with pre-formed bituminous filler and top 30mm primed and sealed with sealing compound, Grade ‘A’ complete all as specified and directed.

Material and labour for reinforced cement concrete M-30 (20mm graded aggregate) (design mix) as in Foundations, including rafts,footings, foundation,beams; plinth beams; bases for columns, etc.; basement slabs,under-reamed piles and mass concrete including necessary formwork complete all as specified and directed.

Design, preparation of detailed drawings, supply, fabrication, and erection at site of a new 8-leaf motorised sliding hangar door with opening size of 31.2m x 7.2m. hangar door shall consist of 4 leaves on each side of the clear opening, with each leaf designed to withstand locational wind loads of class 4 - EN12424, dead loads, and other external forces. door leaves and framework shall be fabricated from high-strength steel sections, designed to ensure structural integrity. door shall be erected at the site, fixed to the existing hangar structure, and tested to ensure proper functioning and alignment. work shall include the supply and installation of all necessary hardware, including top and bottom tracks, top rollers, and door operators etc. door shall be designed to operate smoothly and efficiently, with a minimum of maintenance required. All materials and equipment shall be supplied in accordance with the relevant Indian Standards and International Codes, and shall be subject to inspection and testing all as specified and directed by Engineer-in- Charge.

Supply and fixing Rolled mild steel sections Fe-290 (Gde E-165) as in main and cross beams, hip and jack rafters; purlins where connected to common rafters and running rails and guides for sliding doors; fixedwith angle cleats or other connecting plates complete all as specified and directed.

Removing building materials etc. (other than item retrieved from demolition/ dismantling) shall be removed from site beyond defense land, including loading, unloading and stacking at the destination complete all as specified and directed.

Demolition of cement concrete (unreinforced), of any description & in any position not otherwise specifically provided for, complete all as specified and directed

(k) The hangar door control systems are to be designed to comply with EN 12453: 2001, “Industrial, commercial and garage doors and gates – Safety in use of power operated doors – Requirements”. The main electrical control equipment for each drive leaf shall be housed in a standard steel electrical cabinet to IEC classification IP55 as defined in EN 60529:1992. The cabinet shall be mounted inside the bottom section of the drive leaf. All other principal electrical controls including limit switches and door sensors shall be fitted at low level for ease of maintenance. Each drive leaf is to be fitted at each end with a pendant push button. Push buttons and pendants shall be to IEC classification IP65 as defined in EN 60529:1992. The pendant is mounted to the end of the drive leaf on a cord approx. 2 metres long that allows the operator to move from side to side to see where the door is being driven. The pendants are to be hung up on hooks when not in use. Buttons provided should include (as a minimum): “MOVE” button; “EMERGENCY STOP” button; “DOOR CLOSED” indicator light, to indicate when a drive leaf has reached its fully closed position. The push button system shall ensure that drive leaf can only be operated from their leading edge i.e. not allow any drive leaf to be reversed.

Dismantling wrought iron or mild steel work of any description not otherwise provided for.

Demarcation : Applying 150mm wide White/Red or Yellow (aisle) band marking with florescent consists of 2 components Polyurethane based resin and hardener.

(g) The top track section itself shall be a suitable UB / ISMB Section as per design requirement which is hot-formed steel in accordance with EN 10025: 2004 or equivalent. The top track section shall be designed to accommodate all loads imposed upon it. Furthermore, local buckling of the section due to maximum roller loads on the walls of the section shall not be permitted. Each panel supported at top with suitable diameter. top roller assembly & will have suitable Nos of top rollers. The track and top roller assembly are coordinated such that the roller can also support itself while moving along the track (against its own dead weight and wind loads). Roller shall be inherently corrosion resistant (i.e. Zinc plated Mild steel) and mounted on low friction/sealed bearings which will require no regular lubrication. The top track system shall be designed to limit the inclination of the door leaves due to: discontinuity of bottom rail; high friction of bottom rail; blockage of bottom rail

Mild steel framed work such as grills, gratings, etc. with ends of bars shouldered and/or riveted , framed guard bar; barred iron doors; ladder; rafters, purlins, frame work for water tanks, drain and similar work conforming to Fe 290 Gd E-165 all as specified .

Supply and fix Pre-painted Galvalume Aluminium zinc coating GI based corrugated steel sheet 0.50 mm thick of an colour having tensile strength of 550 Mpa as in roof covering/cladding to wall, fixed with self tapping screws all as specified.