Design, Build, Operate, Own and Transfer (DBOOT) for Nature Based Greening under Flyovers in Guwahati, Assam.

Providing, supplying, installing, testing and commissioning of Forest Green Wall System using PPCP (Polypropylene Co-Polymer) modular pots, designed for vertical installation on RCC/steel structures, comprising high-strength, UV-stabilized PPCP pots/panels of suitable size with interlocking arrangement, resistant to weathering, cracking and deformation, securely mounted on MS framework with anti-corrosion coating; each pot shall be filled with engineered lightweight growing media consisting of a scientifically balanced mix of cocopeat, perlite, vermiculite, compost and soil conditioner, ensuring high porosity, proper aeration, moisture retention and efficient drainage, with media weight optimized for vertical load conditions; provision of geo-textile layer (non-woven, UV-stabilized) inside each pot to prevent media loss while allowing free water percolation, tightened with high-strength UV-resistant thread for durability under outdoor exposure; plantation shall include a mix of ornamental and native plant species such as Roheo, Tradescantia, Syngonium, Spider plant, fern, Jade Plant, Pandanus Etc as well as species selected based on local climatic conditions, shade tolerance and low maintenance requirements, ensuring minimum plant density of 6 plants per square feet and survival rate of not less than 90%; the system shall be compatible with drip irrigation network, ensuring uniform water distribution across all modules; all components including pots, media, plants, geo-textile lining, fixing accessories and supports shall be of approved quality, complete with all labour, materials, transportation, installation, replacement during establishment period, ensuring a dense, uniform, aesthetically pleasing and long-lasting vertical green wall, complete in all respects as per specifications and direction of the Engineer-in-Charge.

Providing structural steel work composed of Specillay designed Vertical Green Strut Channel with strut fixtures, Mild Steel Pipes etc. with caps, bases, mild steel plated, angle brackets, cleats, gusset plates, anchor bolts etc. as per detailed designs and drawings or as directed including cutting, fabrication, hoisting, erecting fixing in position, making riveted/ bolted/ welded connection and one coat of anticorrosive paint and over it two. coats of oil painting approved quality and shade etc. The structure can withstand a wind velocity of 120km/hr complete in all respects as per specifications and directions of the Engineer-in-Charge.

Providing, supplying, installing, testing and commissioning of a fully automated lot-based drip irrigation system for vertical garden (Requirement (Per Plant) 0.5 to 1.0 Liters per plant per day), comprising of independent irrigation zones (lots) with LLDPE drip laterals (16 mm) with inline/online emitters of 4 LPH discharge at 150–300 mm spacing, suitable for uniform water distribution across panels; complete with disc filtration unit (minimum 120 mesh), electrically operated solenoid valves (1”/1.5”, 24V AC/DC) for zone-wise control, programmable multi-station irrigation controller with timer (minimum 4–8 zones, weatherproof IP65 enclosure), venturi-based fertigation system, necessary valves, non-return valves, air release valves, fittings, clamps, and weatherproof electrical connections; the system shall ensure ≥90% distribution uniformity, be UV-stabilized, leak-proof, energy-efficient, and suitable for outdoor conditions, including all labour, materials, installation, testing, trial run, and maintenance provisions, complete in all respects as per specifications and directions of the Engineer-in-Charge.

Providing, supplying, installing, testing and commissioning of piping system for vertical garden, including mainline, sub-main lines, fittings, and water storage tanks, comprising CPVC pipes conforming to IS standards (IS 15778 or equivalent), SDR 11/13.5, with mainline diameter 32–50 mm and sub-main diameter 20–32 mm, capable of withstanding minimum pressure of 6 kg/cm², suitable for continuous outdoor use; pipes shall be UV-stabilized (externally protected where exposed), corrosion-resistant, and joined using CPVC solvent cement of approved make ensuring leak-proof joints; all necessary fittings such as CPVC tees, elbows, couplers, reducers, unions, end caps, and adaptors shall be provided, along with brass/CPVC ball valves, non-return valves, and air release valves at required intervals for efficient system operation and maintenance; the system shall be connected to rotational moulded HDPE/LLDPE water storage tanks of 1000–2000 litres capacity, UV-stabilized, food-grade quality, triple-layer construction, complete with inlet, outlet, overflow, drain, and float valve arrangement, mounted on a stable platform; the entire system shall be securely fixed along the vertical garden structure with proper supports and clamps, ensuring durability, uniform water flow, minimal leakage, and long service life, including all materials, labour, transportation, installation, testing and commissioning, complete in all respects as per technical specifications and directions of the Engineer-in-Charge.

Supplying & erecting Electrical panels with flat flexible wire 3 core 6 sq.mm PVC sheathed submersible type copper cable suitably clamped at fixed intervals with column pipe assembly complete.

Supplying and erecting booster pump of required pressure with booster station.

Providing, supplying, fabricating and installing outdoor stainless steel benches (4-seater capacity) suitable for heavy-duty public use, manufactured using stainless steel of SS grade or equivalent, conforming to relevant IS standards, with primary structural members made from stainless steel square/rectangular pipes of typical size 40×40 mm, 50×25 mm or equivalent, having minimum pipe thickness of 1.2 mm, and seating/backrest components made from stainless steel perforated sheets or slotted pipes with minimum thickness of 1.0 mm; the bench shall be ergonomically designed with proper curvature for comfortable seating, rounded edges for user safety, and a backrest inclined at an angle of 100°–110° for support, with provision of smooth, curved integrated stainless steel armrests (optional but recommended); all components shall be fabricated using CNC cutting, TIG/MIG welding with seamless, burr-free joints, followed by grinding and polishing to achieve a uniform matte/satin (anti-glare) finish, with optional mirror polish for premium applications, ensuring complete resistance to rust, corrosion, UV exposure, moisture and temperature variations, making it suitable for outdoor, coastal and high-humidity conditions; the bench shall have reinforced welded joints and structural stability to support a uniform load capacity of minimum 300 kg, designed for continuous public usage; installation shall be carried out either as surface-mounted benches using pre-drilled stainless steel base plates (minimum 5 mm thickness, size approx. 50×40 mm or 40×40 mm per leg) fixed with anchor fasteners to RCC surface, or as free-standing units with anti-skid rubber bushes where specified; the design shall be anti-vandal, tamper-resistant, modern and minimalistic, with options for customization including powder-coated finishes, branding or laser-cut logos and directions of the Engineer-in-charge.

Providing, supplying, fabricating, installing, testing and commissioning of backlit hoarding/light box (standalone type) complete with structure, lighting and display system, comprising main light box frame made of mild steel (MS) sheet of minimum 1.2 mm thickness, duly fabricated and finished with high-quality powder coating/anodized weather-resistant finish; the unit shall be supported on a standalone MS structural frame made from square pipes of size 40×40 mm or 50×50 mm or equivalent, with base plate of minimum 8 mm thick steel, rigidly fixed to RCC foundation using anchor bolts of minimum M10 size ensuring structural stability; the lighting system shall consist of energy-efficient LED backlit modules or LED strips with power consumption of approximately 18–24W per sq. metre (total approx. 40–60W per unit), operating on 12V DC supply through SMPS driver, providing uniform illumination with diffuser arrangement and neutral white light (4000K); the front display panel shall be made of 3 mm thick acrylic sheet with high-quality eco-solvent printed graphics, finished in matte or glossy as per design requirements; the back panel shall be constructed using ACP sheet of 2–3 mm thickness or GI sheet of 0.5–1 mm thickness, serving as reflective surface and protection for internal components; all electrical components shall include waterproof LED SMPS (IP65 recommended), FRLS copper wiring, and necessary safety devices such as MCB/fuse, with provision of hinged or removable access panel for maintenance; the complete unit shall be weatherproof with minimum IP54 protection, edges sealed with silicone, all metal parts treated with anti-rust coating, and provided with drain holes for moisture escape; the foundation for standalone installation shall consist of RCC block approximately 2 ft × 2 ft × 2 ft (or as per soil conditions) with embedded anchor bolts, designed to withstand wind loads up to 100 km/h; the system shall also include optional features such as edge-lit borders, interchangeable vinyl/flex graphics, frameless fabric lightbox finish for modern appearance, or portable base with wheels where specified; the entire work shall include all materials, labour, fabrication, transportation, erection, fixing, testing and commissioning, complete in all respects as per approved design, specifications and directions of the Engineer-in-Charge.