Mobile scaffoldings and scaffoldings belong to the category of working tools. They differ from traditional scaffoldings because they can be moved. The Italian Legislative Decree no. 81/2008 defines scaffoldings as “wheeled scaffold towers” and they are regulated by Title IV (Movable Scaffoldings), in the Annex XXIII and by technical regulations UNI EN 1004, as they need specific industrial wheels.
Generally, the height of the scaffolding shall not exceed 12 m for indoor usage (therefore no-windy condition) and 8 m for outdoor usage (windy conditions). Furthermore, they shall be provided with a base large enough to safely bear loads and oscillations they may be subjected to when they are moved.
Rules governing the usage of wheels for scaffoldings and construction material for mobile scaffoldings
The scaffolding or mobile scaffolding frame is therefore made of pre-engineered metal tubes and boards. The scaffolding features an intrinsic stability when equipped with one or more floors. Usually construction materials for the frame are steel or aluminium.
The floor of each level can be made of wood as well as of metal, with openable trap doors to be used to move from one floor to the other.
Each floor shall be provided with vertical guards complete with toe boards for all four sides.
Wheels for scaffoldings must be firmly held in place with chocks or equivalent system.
The Italian employer is obliged to draw up the so-called “PiMUS” (assembly, use and disassembly plan) in a simplified format, complete with construction information, including the most delicate aspects, such as supports – including wheels for scaffoldings – and anchoring points.
Mobile scaffoldings shall meet at least the requirements of the European standard SN EN 1004.
Weak points for mobile scaffoldings
Scaffoldings or mobile scaffoldings are quick to install, versatile and also economical. However, they may also cause many accidents, especially in case of assembly and disassembly of old models.
The main reason for this is that they are not provided with safety systems and clear installation instructions. On many old scaffoldings, the workers risk to fall because the vertical side guards are only installed after the installation of a new floor.
If the old scaffoldings no longer comply with the regulations in force, they must be supplemented and modified. In most cases, such changes can be made without any problems. For any detail it is suggested to contact the supplier.
Safety rules for mobile scaffoldings
Incorrect use of wheeled mobile scaffoldings can cause serious accidents. In order to prevent them, it is advisable to stick to the safety rules indicated, first of all concerning assembly and disassembly phases in safety conditions.
Maximum allowed height for mobile scaffoldings have been already mentioned above. It shall be possible to safely assemble, disassemble and use the mobile scaffolding, in the same way as for facade scaffoldings. In particular this involves:
- providing a floor every 2 meters;
- providing working floors with toe boards;
- it is forbidden to climb the scaffolding from the outside. Therefore internal ladders shall be provided. Otherwise, if the scaffolding frame serves as a ladder, the floors shall be provided with openable trap doors;
- floors shall not be staggered;
- wheels for scaffoldings must be chosen to be suitable to the environment where they are to be used.
Wheels for scaffoldings: the most efficient models
Tellure Rôta, a leading company in the field of industrial wheels proposes two series of wheels for scaffoldings, particularly suitable for scaffoldings or mobile scaffoldings.
We are referring to series 60: thermoplastic polyurethane wheels, polyamide 6 centre
For further information on the choice of industrial wheels of light, medium and heavy duty loads, please consult a specific article mentioning the most suitable characteristics according to the environment of usage.