Orchard Rain Shelter Installation Diary: Ground Anchors and Posts – The First Step to a Stable, Productive Orchard
A Strong Shelter Starts with a Solid Foundation
Two days ago, construction began at a cherry orchard project in Zanhuang. Our technical manager and a team of workers were busy installing ground anchors and erecting structural posts. The manager remarked, “Right now the orchard still looks bare, but once the rows of posts are up and the film is installed, these cherries will be protected throughout the rainy season.”
He is absolutely right.
At first glance, an orchard rain shelter may look like a simple steel frame covered with plastic film. But the real craftsmanship lies in what you cannot see — the foundation underground.
Whether the anchors are installed correctly and the posts are perfectly aligned determines how long the structure will last and how well it will withstand wind and weather.
Today, we would like to share some of the installation work we observed on site — including key components and construction details — as a practical reference for growers considering installing rain shelters in their orchards.
1. Installing Ground Anchors – The Hidden Foundation of the Structure
A ground anchor is essentially the underground force point that secures the entire shelter structure. No matter how strong the wind is, the anchor transfers the load safely into the soil.
Common Types of Ground Anchors
| Type | Material | Suitable Conditions | Characteristics |
|---|---|---|---|
| Spiral ground anchor | Galvanised steel | Sandy or loamy soil | Screwed directly into the ground, fast installation |
| Concrete anchor | Reinforced steel + concrete | Clay soils or high-wind areas | Highest strength but requires curing time |
| Ground stake anchor | High-strength steel | Temporary or light structures | Lower cost but limited load capacity |
The System Used on This Site
The team is using galvanised spiral anchors with helical blades at the base. Two workers operate together — one holds the anchor steady while the other uses a powered torque wrench to screw it into the soil.
Within just a few minutes, each anchor reaches a depth of around 1.2 metres.
Key Installation Principles
-
Accurate positioning
Anchor points are marked according to the structural design to ensure perfect alignment. -
Vertical installation
The anchor must remain perpendicular to the ground; otherwise, load distribution becomes uneven. -
Adequate depth
Anchors should extend below the frost line — typically 80–100 cm minimum, and deeper in windy regions. -
Uniform exposed height
The top of the anchor should remain 10–15 cm above ground level to allow secure connection with posts or tension cables.
A small but telling detail: after installing each anchor, the workers check alignment with a level and measure the exposed height with a tape measure. This attention to detail is a hallmark of an experienced installation team.
2. Installing Structural Posts – The Backbone of the Shelter
Once the anchors are installed, the next step is erecting the vertical posts. These posts form the primary structural framework of the rain shelter.
Materials Used for Structural Posts
Shengtao’s orchard shelter systems typically use two types of posts:
-
Prestressed concrete posts
Reinforced internally with steel tendons, offering high bending resistance and long service life. Ideal for permanent orchards. -
Hot-dip galvanised steel pipes (round or square)
Lightweight, quick to install, and suitable for orchards that may require structural adjustments.
Materials Used on This Project
For this installation, the team is using hot-dip galvanised round steel pipes, approximately:
- Diameter: 60 mm
- Wall thickness: 2.0 mm
The bright galvanised coating helps prevent corrosion and can provide more than 10 years of rust protection.
Installation Steps
-
Driving or digging the post holes
In softer soil, posts can be driven directly into the ground. In harder soil, holes are dug and backfilled with compacted soil. -
Checking vertical alignment
After positioning, the post is checked with a level in two directions. -
Temporary bracing
Wooden braces or ropes are used to stabilise the post until the full structure is assembled. -
Connecting to the ground anchors
Steel cables or galvanised tension wires connect the posts to the anchors, creating a stable triangular load-bearing structure.
A Detail from the Site
Unlike traditional turnbuckles often used by individual growers, this project uses a single-axis tensioning mechanism with a sliding track system. The central shaft adjusts tension across the structure, allowing precise control over cable or track tension through either a motor or manual control.
3. Creating the Structural Grid – The Framework of the Shelter
Once the posts and anchor connections are in place, construction moves on to the roof structure, which determines the shelter’s shape and load capacity.
Key Structural Components
-
Longitudinal beams / purlins
Horizontal steel pipes connecting the posts, typically 32–48 mm galvanised pipes. -
Arched frames or trusses
Curved components that form the roof structure. -
Connectors and clamps
Galvanised stamped steel connectors used to securely fix structural components together.
Installation Sequence
-
Install longitudinal beams first
These connect all posts into a stable structural unit. -
Install the arch frames
Starting from one end, arches are installed sequentially and temporarily supported. -
Check diagonal alignment
Diagonal measurements ensure the structure remains square and properly aligned. -
Final tightening
All bolts are tightened using a torque wrench to prevent loosening over time.
Workers on site follow a clear process: first pre-tightening bolts, then performing final torque tightening. A senior technician checks each connection manually to ensure nothing is missed.
4. Small Components and Tools That Make a Big Difference
In addition to the main structural components, several smaller accessories are essential:
| Component / Tool | Function | Tip |
|---|---|---|
| Wire rope clamps | Secures cable ends | Use at least three clamps per end |
| Turnbuckles | Adjust cable tension | Leave room for later adjustment |
| Plastic end caps | Cover cable ends | Prevent injury from sharp wires |
| Levels / surveying tools | Ensure alignment | Every post must be measured |
| Electric torque wrench | Tighten bolts accurately | Saves labour and ensures consistency |
5. Why These Hidden Details Matter
Some growers might wonder: does anchor depth or bolt torque really matter that much?
The answer is absolutely.
Last year, an orchard attempted to reduce costs by installing shallow anchors and widening the spacing between posts. After a single Force 8 wind event, the entire shelter collapsed.
When we inspected the site afterwards, the issue was clear: the anchors had been pulled out of the soil and the posts had shifted.
This is why we always emphasise:
A strong shelter begins underground.
When the foundation is installed correctly, the structure can withstand wind, snow and long-term use. Only then can the covering film and retractable system perform reliably.
6. Next Steps: Installing the Film and Operating System
Once the structural framework is complete, the final stages include:
-
Installing the covering film
High-transparency, UV-resistant PE film is stretched evenly across the structure. -
Installing the retractable system
Including pulleys, cables, and either motorised or manual controls. -
Testing and inspection
Ensuring smooth operation, checking for gaps, light leakage or water accumulation points.
Final Thoughts
Watching the installation team working in the orchard reminds us of a simple principle:
“Orchard protection begins with the foundation.”
This principle applies to agriculture just as much as any other industry.
If you are considering installing rain shelters for your orchard, Shengtao Agricultural Technology provides a complete service — from anchor design and material supply to installation guidance.
We may not always be the cheapest option, but we aim to provide the most reliable and durable solution — because your orchard and your trees deserve the strongest protection.
