Fast-Build Arch-Type Storage Facilities for Developing Regions

Africa • India • South & Southeast Asia • Latin America

Across many low- and middle-income regions, farmers still lose 20–40% of onions, potatoes, grain, and sugar beet between harvest and market. Conventional warehouses are costly to construct, require long build times, and demand sophisticated refrigeration systems.

Arch-type storage hangars provide a practical, affordable alternative. They are quick to assemble, durable, and typically 30–40% cheaper than framed buildings — yet immediately improve crop protection and supply-chain stability.

What Is an Arch-Type Building?

An arch-type hangar uses curved steel profiles or formed sheets to create the entire structure — roof and walls — in one continuous arc.
This geometry provides high structural strength while minimizing material use, allowing:

• rapid installation,

• long service life,

• low maintenance,

• and lower overall CAPEX.

Key Advantages

✔ Low capital cost — usually 30–40% less than conventional framed warehouses.
✔ Fast construction — complete installation in weeks, not months.
✔ Ideal for bulk storage — large central span works well for loose crops.
✔ High durability — service life often exceeds 50 years with basic upkeep.

Limitations

⚠ Maximum practical width ~24 m per hangar.
⚠ Curved walls reduce efficiency for container or pallet storage.
⚠ Hangars require spacing for drainage and maintenance (snow load not an issue in tropical climates).

Storage Methods & Internal Technology

1. Bulk Storage (Primary Use Case)

Onions, potatoes, grain, sugar beet.

• Floor ventilation ducts

• Axial or centrifugal fans

• Fresh-air modules for purge cycles

2. Container / Pallet Storage

Suitable for higher-value produce; requires careful aisle and racking design to offset the curved walls.

3. Ventilation

Design fresh-air intake at ~120 m³/ton (crop specific) — sufficient to remove respiration heat and CO₂.

4. Cooling (Optional)

Modular chillers or evaporators where ROI justifies the investment — especially for export-grade produce or longer storage periods.

Design principle: Uniform airflow is more effective than peak airflow.
Properly sized fans and ducts prevent hot spots and reduce decay.

Why Arch-Type Hangars Fit Africa, India, and Similar Markets

Affordability

Cooperatives, farmer groups, and small agribusinesses can finance a single hangar where framed construction would be unattainable.

Speed

Fast build times allow growers to protect crops within the same season.

Loss Reduction

Simply keeping produce dry, shaded, and well-ventilated can cut losses by 50%.

Scalability

Start with one hangar and add units as volumes grow.
Upgrades (better fans, ducts, cooling) can be installed in phases.

Simple ROI: Back-of-the-Envelope Economics

Scenario	Without Hangar	With Arch Hangar	Impact
1,000 t onions (India)	~30% loss = 300 t	~10–15% loss = 100–150 t	Save 150–200 t/season (≈ $30–40k @ $200/t)
CAPEX	—	$80k–$100k (typical)	Payback ~2–3 years

Actual performance varies by crop, climate, local pricing, and operational discipline — but consistently demonstrates strong financial value.

Regional Highlights

Africa (East, West, South)

Priority: shade, rain protection, strong airflow.
Modular fans and floor ducts offer the biggest early improvements.

India

Massive onion and potato volumes benefit from distributed hangars that stabilize prices and reduce market volatility.

South & Southeast Asia / Latin America

Humidity control and drying capacity are essential.
Cooling can be added in stages as export programs grow.

Construction & Delivery Overview

Site Preparation

• Compacted base

• Drainage channels

• Orientation aligned with prevailing winds

Structure

• Prefabricated steel arches

• Corrosion-resistant coatings

• Simple anchoring systems

Installation

• Local crew training (2–5 days)

• Full assembly within weeks

• Minimal heavy machinery required

Future Upgrades

• Ventilation ducts

• T/RH/CO₂ sensors

• Dust filtration

• Modular chillers

Critical Principle

A building cannot fix poor intake quality.
Always ensure proper curing/drying, remove field moisture and soil, and avoid loading diseased lots.
Good storage starts before the crop enters the hangar.