Insights
Selecting a Steel Tank Tower: Key Design & Selection Factors
Selecting an elevated steel tank tower requires balancing structural safety, operational requirements, site conditions, and long-term maintenance costs.
Key factors to consider in Kenya.
1. Water Capacity and Structural Loads
- Operating Weight: Water weighs approximately 1,000kg per m3.The tower must support the weight of the full tank (dead load + water live load). The tank could be a plastic tank or a pressed steel tank.
- Wind & Seismic Exposure: High-wind or earthquake-prone zones require reinforced cross-bracing, thicker steel profiles, or specialized dynamic load damping.
2. Tower Height & Head Pressure
- Required Pressure: Water pressure in a gravity-fed system is determined by elevation. An elevation of 10m provides roughly of 1 bar of static pressure.
- Elevation Profile: The tower height must account for friction losses in the piping network to reach the highest supply point with adequate flow.
3. Soil Bearing Capacity & Foundation
- Geotechnical Conditions: Soft or clay soils require deep pile foundations, whereas high-bearing rock or firm soil allows standard concrete pad footings.
- Uplift Forces: Overturning forces caused by strong winds on empty or light tanks must be anchored into heavy reinforced concrete bases.
Material & Structural Configuration
| Factor | Option A: Galvanized Steel Lattice | Option B: Welded Pedestal / Monopole | Option C: Stainless Steel Frame |
| Best For | Agricultural, residential, medium commercial | Large municipal, high-wind areas | Food-grade, coastal, or corrosive environments |
| Corrosion Resistance | High (hot-dip galvanizing) | High (industrial epoxy/polyurethane coatings) | Excellent (inherent material resistance) |
| Constructability | Modular, bolt-together; easy transport | Requires heavy crane lifting & field welding | Modular or pre-welded sections |
| Cost Profile | Lower initial cost | Moderate-to-high | Higher material cost |
Secondary Considerations
- Corrosion Protection: Hot-dip galvanizing according to ISO 1461/ASTM A123 is standard for outdoor framing. Coastal or aggressive industrial environments may require high-build epoxy or polyurethane coating systems.
- Safety & Maintenance Access: Ensure the structure includes safety cage ladders, rest platforms at standard intervals
- Site Accessibility: Confirm that transport vehicles and cranes can reach the installation footprint, especially for pre-fabricated single-piece towers or heavy tank lifts.
As a steel tank fabricator in Kenya, Afritec Steel Fabricators provides a range of steel products and services which include:
- Steel Tank Towers
- Pressed Steel Tanks
- Steel godowns and warehouses
- Warehouse racks
- Light gauge steel frames
- Steel fence and other structural steel works.
Contact us today for custom steel fabrication.
