Roller doors are a great product for facilities such as industrial halls, warehouses, and commercial and service buildings. The range of WIŚNIOWSKI’s industrial roller doors was designed with such buildings in mind. Now fitted with additional accessories, the doors have gained higher resistance to wind load, which allows investors to plan even more demanding buildings.
Wind load resistance classes
The PN-EN 12110:2001 standard defines 5 wind load resistance classes The classes are determined as a result of specialist measurements. The measurements focus on the product elements most susceptible to deformation at pre-set test overpressure or negative pressure parameters. The technical condition and working order of the tested product are also checked after test pressure is applied. The results are thoroughly analysed and used to ultimately determine the product’s resistance to wind load. Tests like these provide the manufacturer with information on whether the product will withstand the conditions in which it will be used for many years. The tests also reassure the manufacturer that the marketed product complies with high safety requirements.
Higher resistance to wind
The changing climate is the cause of the ever more frequent adverse climatic events. Strong winds and violent storms are no longer the distinctive feature of mountainous and seaside areas. Raising the bar on standards regarding the structural elements’ resistance to wind load and adapting them to more and more restrictive standards is a natural consequence of the changing environment. WIŚNIOWSKI’s roller doors now have improved resistance to wind load (class 3) thanks to the use of solutions such as wind locks and additional reinforcing elements.
The division of Poland into wind zones
Poland can be divided into 3 regions based on wind zones. These include: the entire central Poland with the mildest conditions, the seaside strip – the most demanding region, and the southern mountainous regions with the strongest winds. These zones are determined based on the PN-77/B-02011 standard and form a certain type of a wind map of Poland. This makes designing buildings that are to be erected and hardware that is to be used in the given zone much easier. Having this knowledge, the investor can design a safe building structure that meets the requirements of building standards.
The improved BR-100 roller door
Adjusting the door installed in industrial halls to the conditions present in the given wind zone determines the strength of the building. Doors with larger dimensions should be able to transfer the load to which they are exposed. WIŚNIOWSKI introduced new solutions for industrial roller door accessories, which improve the strength parameters of the structure. The primary new product we offer are wind locks. They are an extension of the profiles’ distance brackets. When the door is operated, it travels in specially designed tracks, further reinforced with stabilizing holders. They are installed in each door profile, even the bottom one. Wind locks are available as standard with door widths over 5,000 mm. For smaller widths, they are an optional accessory. When a door is fitted with wind locks, you can be sure that the product will stand the test of the conditions to which it is exposed. The second element increasing the door’s resistance to wind load is the reinforced bottom profile. When it is installed, the door curtain is more rigid. This solution was implemented as standard. The reinforced bottom profile is painted the same colour as the curtain. When paired with the new three-chamber bottom curtain gasket, the reinforced bottom aluminium profile is a perfect solution increasing the sealing between the curtain and the floor. Moreover, significantly higher elasticity of the gasket improves the reaction time of the safety edge when an obstacle is present.
The solutions described above allowed us to increase the resistance of the BR-100 industrial roller doors to wind load from class 2 to class 3. Doors with this class of resistance to wind load constitute a proper barrier to wind with the maximum pressure of 1,200 Pa and are recommended for all kinds of buildings that have to meet high strength standards.
By: Elżbieta Solewska