Scaffold load classes simply explained
In practice, incorrectly chosen load classes quickly lead to overloading, safety risks and legal problems. Conversely, the right load class ensures clear processes, safe working conditions and smooth project handling. That is exactly where this guide comes in.
On this page we explain, clearly and with a practical focus,
- what scaffold load classes are,
- how the individual classes differ,
- which load class is required for which work
- and how to avoid typical planning and usage mistakes.
Whether facade renovation, painting or ETICS installation: with the right knowledge you make well-founded decisions and ensure your scaffold is used safely, efficiently and in line with the standard.
The differences between scaffold load classes
The difference between load classes 1, 2 and 3 lies in the permissible load per scaffold level – and therefore directly in which work is allowed on the scaffold. This is regulated in DIN EN 12811‑1.
Scaffold load classes 1–3 in direct comparison (DIN EN 12811‑1)
| Load class | Permissible area load | What is permitted? | Typical use |
|---|---|---|---|
| 1 | 0.75 kN/m² (≈ 75 kg/m²) | Walking + light hand tools | Inspection walks, checks |
| 2 | 1.50 kN/m² (≈ 150 kg/m²) | 1–2 persons + light work | Painting without material storage |
| 3 | 2.00 kN/m² (≈ 200 kg/m²) | Persons + working material | Standard facade work |
Scaffold load classes — overview
Which load may stand on which scaffold? EN 12811 · as of 04/2026
| Load class | Purpose & use | Permitted | Not permitted |
|---|---|---|---|
LC 1 Access only |
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|
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LC 2 Light work |
|
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LC 3 Site standard |
|
| No explicit restrictions |
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Further reading:
Step by step: calculating the load class correctly
1. Record all loads (per scaffold level)
You always allow for the most unfavourable usage situation.
a) Person load
- Practical value: 1 person ≈ 1.0 kN (≈ 100 kg)
- Example: 2 persons → 2.0 kN
b) Material load
- Sacks (render, mortar, insulation)
- Paint buckets, tiles, tools
Convert the weight in kg → kN
Rule of thumb:
100 kg ≈ 1.0 kN
c) Equipment / machines
- Mixer, cutting machine, ETICS packs etc.
2. Convert the load to the area
The DIN standard works with area loads (kN/m²).
Formula:
Total load (kN) ÷ scaffold area used (m²) = area load (kN/m²)
Example:
- 2 persons → 2.0 kN
- Material → 1.5 kN
- Total → 3.5 kN
Scaffold area:
- 2.5 m length × 0.73 m width = 1.83 m²
3.5 kN ÷ 1.83 m² = 1.91 kN/m²
3. Choose the right load class according to DIN EN 12811
| Load class | Permissible area load |
|---|---|
| 1 | 0.75 kN/m² |
| 2 | 1.50 kN/m² |
| 3 | 2.00 kN/m² |
| 4 | 3.00 kN/m² |
| 5 | 4.50 kN/m² |
| 6 | 6.00 kN/m² |
Typical load classes in practice
| Work | Usual load class |
|---|---|
| Painting & light facade work | Class 2 |
| ETICS / rendering work | Class 3 |
| Natural stone / heavy materials | Class 4–5 |
| Industry / special loads | Class 6 |
Important safety rules (often overlooked)
- The load class applies per scaffold level, not to the whole scaffold
- Do not stack material unless it has been calculated
- The load class must be shown on the scaffold sign
- The width class (e.g. W09 for ETICS) is additionally mandatory
Here is the guide to erecting a scaffold correctly:
FAQ: scaffold load classes simply explained
Scaffold load classes define how much load a scaffold level may safely carry per square metre. They determine how many people may work at the same time, whether material may be stored and which work is permissible in line with the standard.
The load classes are regulated in DIN EN 12811-1. There are 6 load classes in total, from light access (LC 1) up to heavy industrial loads (LC 6).
For simple painting and cleaning work, load class 2 is usually sufficient. It permits 1–2 people with light tools, but no permanent material storage such as pallets or sacks.
Load class 3 is the standard in residential construction and for facade work such as rendering or ETICS installation. It permits several people as well as practical quantities of working material.
The calculation takes three steps:
- Record all loads (people, material, equipment)
- Divide the total load by the scaffold area used → result in kN/m²
- Choose the right load class according to DIN EN 12811
Rule of thumb: 100 kg ≈ 1.0 kN
No — the load class applies per scaffold level, not to the entire scaffold. This is one of the most common mistakes in practice.
The load class must be shown on the scaffold sign. In addition, the width class (e.g. W09 for ETICS work) must also be indicated.
For heavy materials such as natural stone or tiles, load class 4 or 5 is recommended. For industrial applications with special loads, load class 6 (6.00 kN/m²) is used.
An incorrectly chosen load class can lead to overloading, safety risks and legal problems. In the worst case, the scaffold can collapse. The right load class is therefore not an optional recommendation but a safety obligation.
How to correctly calculate the load class of a scaffold
Scaffold load classes are among the most important yet most frequently misunderstood fundamentals in scaffolding. They define which loads a scaffold may safely carry per level – i.e. how many people may work at the same time, whether material may be stored and which work is permissible in line with the standard.
Scaffold load classes — interactive calculator
Calculate your load class, understand the classes, view the practice table — according to DIN EN 12811‑1.
Calculation details
Recommended load class
All load classes according to DIN EN 12811‑1 in direct comparison:
| Load class | Permissible load | Typical use | Permitted | Not permitted |
|---|---|---|---|---|
| LC 1 | 0.75 kN/m² ≈ 75 kg/m² | Inspection walks, checks | ✓ persons, Handwerkzeug | ✕ Materiallagerung |
| LC 2 | 1.50 kN/m² ≈ 150 kg/m² | Painting, cleaning | ✓ 1–2 persons, leichtes Werkzeug | ✕ Pallets, sacks, insulation boards |
| LC 3 | 2.00 kN/m² ≈ 200 kg/m² | Rendering, ETICS, facade | ✓ Mehrere persons + Material | — |
| LC 4 | 3.00 kN/m² ≈ 300 kg/m² | Natural stone, heavy materials | ✓ Schweres Material, Maschinen | — |
| LC 5 | 4.50 kN/m² ≈ 450 kg/m² | Industry, plant construction | ✓ Hochlastbetrieb | — |
| LC 6 | 6.00 kN/m² ≈ 600 kg/m² | Special loads, heavy assembly | ✓ Maximallast | — |
Which load class for which work? Practical overview by trade:
| Type of work | Load class | Permissible load | Note |
|---|---|---|---|
| Inspection walk / check | LC 1 | 0.75 kN/m² | Walking only, no tools |
| Painting (without material storage) | LC 2 | 1.50 kN/m² | Max. 1–2 persons + paint buckets |
| Cleaning work | LC 2 | 1.50 kN/m² | Light equipment permitted |
| Minor maintenance work | LC 2 | 1.50 kN/m² | No pallets / sacks |
| Rendering work | LC 3 | 2.00 kN/m² | Most common LC in residential construction |
| ETICS / facade insulation | LC 3 | 2.00 kN/m² | + observe width class W09 |
| General facade work | LC 3 | 2.00 kN/m² | Standard house / residential |
| Natural stone / heavy tiles | LC 4 | 3.00 kN/m² | Allow for heavier material |
| Industry / plant construction | LC 5–6 | 4.50–6.00 kN/m² | Involve a structural engineer |