🔹 Introduction
If rafters carry the roof and purlins support the sheets, then pillars (columns) are the vertical backbone of the entire hangar.
👉 Pillars = primary load-bearing members that transfer all structural loads to the foundation
In German-engineered hangars, columns are designed with extreme precision, because any failure here compromises the whole structure.
🔹 What Are Pillars (Columns)?
Columns are vertical structural elements that:
- Support rafters and roof loads
- Transfer forces safely to the foundation
- Resist axial compression, bending, and lateral forces
🔹 Types of Columns in German Hangars
1. 🟫 Built-Up Steel Columns
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Technical Features:
- Made by welding steel plates
- Custom-designed cross-sections
Why Used:
✔ Handles heavy loads
✔ Ideal for large-span hangars
2. 🟦 Hot-Rolled I / H Columns
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Technical Features:
- Standard I or H sections
- Manufactured in mills
Advantages:
✔ Cost-effective
✔ Easy to install
3. 📦 Box Columns (Closed Sections)
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Technical Features:
- Hollow rectangular or square sections
- High torsional resistance
German Engineering Use:
✔ Used where wind loads are high
✔ Better stability
🔹 Load Transfer Mechanism
Columns are designed according to
Eurocode EN 1991
Load Flow:
Roof → Purlins → Rafters → Columns → Foundation → Soil
🔹 Forces Acting on Columns
1. Axial Compression
- Main vertical load from roof
- Most critical force
2. Bending Moment
- Due to:
- Wind loads
- Portal frame action
3. Shear Forces
- Horizontal loads transferred through frame
4. Buckling (Critical Failure Mode)
- Long columns may fail by instability
- Controlled using design and bracing
🔹 Column Base Connection
🔩 Base Plate & Anchor Bolts
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Components:
- Base plate (steel)
- Anchor bolts embedded in concrete
- Grouting layer
Engineering Role:
✔ Transfers load safely to foundation
✔ Maintains alignment
🔹 Column-to-Rafter Connection
- Moment-resisting joint
- Uses:
- End plates
- High-strength bolts
- Welded connections
👉 This joint forms the portal frame system, a hallmark of German hangars.
🔹 Design Considerations
1. Slenderness Ratio
- Determines buckling risk
- Lower ratio = safer column
2. Load Combination
Based on
Eurocode EN 1991:
- DL + LL
- DL + WL
- DL + WL + SL
3. Corrosion Protection
- Galvanization
- Protective coatings
4. Alignment Precision
- Even small errors → structural issues
- German systems ensure millimeter accuracy
🔹 Bracing Support (Very Important)
Columns rely on:
- Cross bracing
- Roof bracing
👉 Prevents lateral movement and collapse
🔹 Common Failures (If Poorly Designed)
- Buckling due to high slenderness
- Base plate failure
- Anchor bolt pull-out
- Misalignment leading to uneven load distribution
🔹 Why German Columns Are Superior
✔ Optimized using structural analysis software
✔ Fabricated with high precision
✔ Strong connection detailing
✔ Designed under Eurocode EN 1991
🔹 Final Insight
Columns are not just vertical members—they are:
👉 The primary load path that ensures the entire hangar stands safely
In German engineering, columns are designed to:
- Carry massive loads
- Resist environmental forces
- Maintain long-term structural integrity