Key takeaways:
The article summarizes the key design and operational requirements for fixed service platforms, including load capacity, dimensions, materials, deflection, and fall protection.
- Service platforms provide safe, ergonomic access to machines in accordance with EN ISO 14122.
- EN ISO 14122 consists of 4 parts: selection of access means, working platforms/walkways, stairs/guardrails, and fixed ladders.
- The standard is harmonized with the Machinery Directive 2006/42/EC and supports compliance and CE marking.
- Requirements: load capacity min. 1.5 kN/m² (working surfaces) and 2.5 kN/m² (walkways); width min. 600 mm/500 mm.
- Guards: guardrails min. 1,100 mm, rail spacing max. 500 mm, load 300 N/m; toe boards min. 100 mm.
Service platforms play a key role in providing safe, ergonomic access to machinery. Under EN ISO 14122, fixed means of access such as service platforms must meet a range of requirements to ensure machinery safety and user safety. These standards cover the design, construction, and use of service platforms, which is essential for engineers responsible for machinery safety in industrial plants.
Scope of EN ISO 14122
EN ISO 14122 consists of four parts that define the requirements for fixed means of access to machinery:
- Part 1: General requirements for selecting fixed means of access.
- Part 2: Service platforms, working platforms, and walkways.
- Part 3: Stairs, step ladders, and guardrails.
- Part 4: Fixed ladders.
EN ISO 14122 is a harmonized standard under the Machinery Directive 2006/42/EC, which means that applying it helps meet the directive’s requirements and obtain CE marking.
Service platforms: design and construction
The design of service platforms must take a number of factors into account to comply with EN ISO 14122. The key guidelines are as follows:
- Dimensions and strength:
- Minimum load capacity: Service platforms must withstand a load of at least 1.5 kN/m² for working areas. Walkways must withstand a load of at least 2.5 kN/m².
- Platform dimensions: The width of a service platform should not be less than 600 mm. Walkways must be at least 500 mm wide.
- Static and dynamic loads: Service platforms must be designed to withstand both static loads (e.g. the weight of tools and users) and dynamic loads (e.g. user movement).
- Materials:
- Resistance to environmental conditions: Materials used to build service platforms must be resistant to corrosion, moisture, and extreme temperatures. Stainless steel, aluminium, or composite materials are recommended.
- Slip resistance: The surfaces of service platforms must provide adequate slip resistance, such as through perforations or serration, to prevent falls.
- Deflection:
- Permissible deflection: The standard specifies the maximum permissible deflection for service platforms, which must not exceed 1/300 of the span length for service platforms and platforms, and 1/200 of the span length for stairs.
- Deflection checks: Designers must provide for regular deflection checks of service platforms to ensure that they do not exceed permissible values during normal operation.
It is advisable to draw on the experience of a design office with expertise in machine design and construction, or to use engineering outsourcing involving engineers experienced in designing platforms for production lines. That experience also makes it possible to take a broader view of the risk assessment for the entire line and draw conclusions about the maintenance and servicing work required. For example, improving access for service purposes may create new risks, because components previously considered safe and out of the operator’s reach may, in the new situation, require guards.
Service platforms must withstand a load of at least 1.5 kN/m² for working areas and 2.5 kN/m² for walkways.
| Parameter | Value | Notes |
|---|---|---|
| Minimum load capacity | 1.5 kN/m² | Applies to working areas |
| Platform width | Min. 600 mm | Allows safe access and manoeuvring |
| Material | Stainless steel, aluminium, composite materials | Resistance to corrosion, moisture, and extreme temperatures |
| Slip resistance | Perforations, serration | Ensures user safety |
| Permissible deflection | 1/300 of the span length | Deflection checks must not exceed this value |
| Deflection checks | Regular inspection | Ensures long-term durability and safety |
| Parameter | Value | Notes |
|---|---|---|
| Minimum load capacity | 2.5 kN/m² | Applies to stair surfaces |
| Stair width | Min. 500 mm | Allows safe access and manoeuvring |
| Slope | 30° – 38° | Optimal incline for user safety |
| Permissible deflection | 1/200 of span length | Deflection must not exceed this value |
| Material | Stainless steel, aluminium, composite materials | Resistant to corrosion, moisture, and extreme temperatures |
| Slip resistance | Perforations, ribbing | Ensures user safety |
Dimensions and design of safety components
- Guardrails:
- Height: The minimum guardrail height is 1100 mm from the surface of the service platform.
- Spacing between rails: The maximum spacing between rails is 500 mm.
- Load resistance: Guardrails must withstand a horizontal load of at least 300 N per metre of length.
- Toe boards:
- Height: The minimum toe board height is 100 mm.
- Distance from the floor: Toe boards should be installed no more than 10 mm above the floor to prevent small objects from slipping through.
The minimum height of guardrails is 1100 mm, and the maximum spacing between rails is 500 mm, ensuring adequate support and protection for users.
| Parameter | Value | Notes |
|---|---|---|
| Guardrail height | Min. 1100 mm | Provides adequate fall protection |
| Spacing between rails | Max. 500 mm | Provides adequate support for users |
| Load resistance | 300 N/m | Guardrails must withstand a horizontal load |
| Toe board height | Min. 100 mm | Prevents small objects from slipping through |
| Toe board distance from the floor | Max. 10 mm | Prevents small objects from slipping through |
| Material | Stainless steel, aluminium, composite materials | Resistant to corrosion, moisture, and extreme temperatures |
Conditions for using service platforms
The conditions in which service platforms are used affect both their design and their use. The EN ISO 14122 standards indicate that working platforms should be used when:
- The climbing height is significant.
- The frequency of use is low.
- Transporting large tools or equipment is not expected.
Loads and dimensions
Service platforms must be designed to account for various loads and dimensions. EN ISO 14122 provides detailed guidance on:
- Static and dynamic loads: Service platforms must withstand both static loads (e.g. the weight of users and tools) and dynamic loads (e.g. user movement).
- Dimensions of guardrails and toe boards: Guardrails should be at least 1100 mm high, and toe boards at floor level should be at least 100 mm high.
- Width and slope: The width of service platforms should be suited to the movement of users and equipment, with a recommended stair incline of 30° to 38°.
Inspections and testing
To ensure compliance with EN ISO 14122, service platforms must undergo rigorous inspections and testing. Some of the required procedures include:
- Strength tests: These tests assess whether the service platform can withstand the maximum expected loads.
- Slip-resistance tests: The surfaces of service platforms are tested for slip resistance under different conditions.
- Visual inspections and measurements: Regular visual inspections and dimensional checks are essential for detecting potential damage or wear.
- Load simulations: Service platforms are subjected to simulations of different load scenarios to ensure they can withstand the expected operating conditions. These can be carried out using physical loads after manufacture, but it is far better to perform strength calculations, for example using finite element analysis tools.
EN ISO 14122 specifies allowable deflection for service platforms at 1/300 of the span length, which is critical to maintaining their durability and safety.
Operating instructions and maintenance
Every service platform should be supplied with operating instructions containing information on:
- Conditions of use: Maximum load, number of users, etc.
- Maintenance: Regular inspections and maintenance to ensure long-term durability and safety.
- Training: Operators and personnel should be trained in the correct use and maintenance of service platforms.
Taking service operations into account
Designers must anticipate what service operations will be carried out on service platforms, taking into account:
- Type of tools and parts: Service platforms must be designed to allow the safe use of tools and the transport of parts required for servicing.
- Number of people: Service platforms must be wide enough and strong enough to accommodate the number of people expected to perform service operations.
- Accessibility: Service platforms should be designed to provide easy and safe access to all areas requiring service.
Service platforms: incorporating platforms into production lines
Service platforms are a key element in production line design, especially when they form part of complex machinery systems. Machine designers must include working platforms in their designs to ensure safe and ergonomic access to machines and equipment at every stage of production. EN ISO 14122 states that access to machinery must be designed to minimize the risk of accidents and enable servicing, maintenance, and repair work to be carried out safely.
When service platforms are an integral part of a production line, they must meet all applicable safety standards, including those set out in the Machinery Directive 2006/42/EC. As elements integrated with machinery, service platforms must be designed and built in accordance with machinery safety requirements. The technical documentation for service platforms forms part of the overall technical documentation for the entire production line.
As regards CE marking, a service platform on its own does not need to bear the CE mark as a separate item. However, if a service platform is part of a production line, the entire line must comply with the relevant standards and regulations and therefore must bear the CE mark. In the EC Declaration of Conformity for the entire production line, if EN ISO 14122 is listed, then the platform must comply with that standard.
The operating instructions for the entire production line should include information on all service operations carried out using service platforms. These instructions should describe in detail how to use the platforms safely and how to perform service operations so as to ensure compliance with safety standards and minimize the risk of accidents.
Service platforms compliant with EN ISO 14122 are a key element in ensuring safe access to machinery in industrial plants. Engineers must become thoroughly familiar with the requirements of these standards in order to design, build, and use working platforms in line with the highest safety standards. Meeting these requirements minimizes the risk of accidents and ensures a safe working environment.
Service Platforms: Safe Access to Machinery
Service platforms as fixed means of access to machinery are covered by EN ISO 14122. It consists of four parts covering, among other things, platforms and walkways, stairs, and fixed ladders.
EN ISO 14122 is a standard harmonized with the Machinery Directive 2006/42/EC. Applying it helps meet the directive’s requirements and obtain CE marking.
Working surfaces of platforms must withstand at least 1.5 kN/m², and walkways at least 2.5 kN/m². Platform width should be no less than 600 mm, and walkways must be at least 500 mm wide.
Materials should be resistant to corrosion, moisture, and extreme temperatures; stainless steel, aluminum, or composite materials are recommended. Surfaces should be slip-resistant, for example perforated or tread plate.
Guardrails should be at least 1,100 mm high, the maximum spacing between rails is 500 mm, and they must withstand a horizontal load of at least 300 N per meter. Toeboards should be at least 100 mm high and installed no more than 10 mm above the floor.