CHAPTER 01 – APPLICATIONS Rail Ventilation 19 2023 | 06 General notes The following tables contain a sub-set of the roof systems available on the market. If you are unable on our tables to find the ventilation flaps or system dimensions you are planning to use in your project, we will be pleased to help you work out which types of LZG and EWA you require for an optimum drive system configuration. In our applications table, you can establish whether your project needs our LZG 20 with 5500 N or 10000 N, or even the LZG 24 with 13000 N and 16000 N. The torque required for the LZG is based on the linear load rating of the rack. Loadings applied by push bars are not taken into account here, and must be dissipated by the rail mounting on the building structure. The figures in these tables are non-binding. STANDARDS The table calculations are based on the German greenhouse standard DIN EN 13031-1 : 2003-09 greenhouse dimensions and construction - part 1: Culture greenhouses. This was based on the German edition EN 13031 – 1 : 2001. BASICS These tables can be used for projects involving the following dimensions: > Greenhouse widths (flap width) of 3.20 to 4.80 m. > The roof angle is 22°– 25°. > The glass thickness is 4 mm (10 kg/m2). > The ‘gutter height‘ up to top edge of rail mounting (Tr) is 150 –180 mm. > The rack height (Hzd) may be 11–60 mm. > Calculation of the required stroke H presupposes that the opening angle of the window flaps is twice as large as the angle of roof inclination. > An LZG needs approx. 70 Nm of input torque at a load of 10000 N. INSECT PROTECTION For applications with insect protection, the details for ventilation flaps reduce due to their increased weight. With insect protection weighing 1800 g per linear metre, the value for the flaps must be reduced as follows: > With panel width of 3.20 m – 25 % > For all other panel widths – 20 % Note: > We are always delighted to advise you on configuration questions. Selection tables for rail ventilation dr br ar Bop Dach Bn Hn Hop Tr Hdp Hzd Rs Roof
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