Industry: Commercial Residential Property | Project Type: Custom Rooftop Potable Water Storage
Project Overview
This project is a custom drinking water storage solution for a commercial apartment property. The client needed a reliable potable water tank installed on the rooftop of the caretaker’s building, to support daily water supply for the entire apartment complex.
The client provided a usable rooftop area of 4.5m × 9m, with a clear requirement of 15,000 litres usable capacity and food-grade 304 stainless steel material. They also required sufficient service space around the tank, and confirmed the rooftop structure had adequate load-bearing capacity. Winsco Metal took charge of full structural design, dimension verification and tank fabrication.
Core Project Specifications
表格
| Item |
Specification |
| Tank Type |
Fully welded rectangular stainless steel potable water tank |
| External Dimensions |
3.5m (Width) × 8.0m (Length) × 0.7m (Height) |
| Rated Usable Capacity |
15,000 Litres |
| Maximum Working Water Depth |
540mm (measured from inner bottom) |
| Freeboard (Overflow Reserve) |
160mm (above working water level) |
| Material |
Food grade AISI 304 stainless steel |
| Plate Thickness |
Bottom plate: 3.0mm; Side wall: 2.0mm; Top cover: 2.0mm |
| Standard Fittings |
Ø450mm top manhole, water inlet, water outlet, overflow port, bottom drain port, lifting lugs |
| Application |
Daily potable water supply for commercial apartment |
Design & Solution Highlights
1. Site-adapted Footprint Design
We adopted a 3.5m × 8.0m footprint that fits perfectly within the 4.5m × 9m rooftop area, reserving enough clearance on all sides for routine inspection, maintenance and pipeline connection. The low-profile height of 0.7m also reduces wind load on the rooftop and matches the building’s facade requirements.
2. Precise Volume & Water Level Control
To eliminate ambiguity in capacity definition, we clearly distinguished usable working capacity from geometric full volume.
- The 540mm working water depth delivers exactly 15,000L usable storage as requested.
- The 160mm freeboard above the maximum water level prevents overflow during water filling and stabilizes daily operation.
- This design ensures the client gets the exact usable volume they need, rather than a misleading full-tank geometric figure.
3. Rooftop-optimized Structural Design
- The 3.0mm thick bottom plate distributes weight evenly across the rooftop foundation, reducing concentrated load.
- Internal reinforcing ribs are added inside the tank to ensure structural rigidity under long-term water pressure, suitable for continuous outdoor rooftop installation.
- Fully welded construction eliminates leakage risks and extends service life.
4. Food-grade Safety for Potable Water
All plates and welding consumables comply with food-grade stainless steel standards, suitable for drinking water storage. The smooth internal surface is easy to clean and inhibits scale buildup, meeting hygiene requirements for residential water supply.
Client Benefits
- Tailored solution: Custom dimensions and capacity perfectly match the client’s rooftop space and water demand.
- One-stop supply: Complete tank body + all standard fittings, reducing on-site procurement and construction work.
- Clear technical confirmation: Detailed dimension sketches and parameter descriptions allow the client to fully confirm the solution before production.
- Low maintenance cost: Corrosion-resistant 304 material and robust structure ensure long service life with minimal maintenance.
About Winsco Metal
Winsco Metal is a professional manufacturer and exporter of stainless steel water tanks and building materials. We provide custom design, fabrication and global supply services for potable water tanks, fire water tanks and industrial storage tanks for commercial, residential and municipal projects.
If you have similar stainless steel tank requirements or custom project needs, welcome to contact us for a tailored solution and quotation.
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