Palram SUNLIT - Manual (Page 6)

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Wind and Snow Load Calculation
Local building codes and standards in most countries provide details for required design loads, which should be consulted before
installation. The information below is provided for general reference.
Conversion of Wind Velocity Values into Wind (or Static) Pressure
Property Units
Wind Strength Level
Moderate Strong Storm Hurricane
Wind velocity
Km/h 20 40 - 60 80 - 100 120 - 140(+)
m/sec 6 11 - 17 22 - 28 33 - 40
Static pressure
Kg/m² 2 8 - 17 30 - 50 70 - 100(+)
psf 0.4 2 - 4 6 - 10 14 - 20(+)
Snow Load: Snow load from accumulated snow cannot be disregarded. Both structure and glazing should be suitable for this extra
weight. When choosing greenhouse roofing material for snow-bound areas, a single wall corrugated polycarbonate roofing (e.g.
SUNTUF or SUNSKY) may become preferable. Please consult with your Palram distributor.
Indicative snow load Per 1.0 cm (0.4 inch) of height or thickness
Fresh, fine, fluffy snow From 0.8 to 1.9 kg/m² (0.16-0.39 psf )
Wet, watery, compacted snow From 2.0 to 8.0 kg/m² (0.41-1.64 psf )
Spacing and Load Calculations for Different Methods of Installation
1. Four Sides Clamp or Frame
This method utilizes comparatively small, separate glazing elements, cut from larger sheets. SUNLITE is put inside a four-sided frame
or supporting structures, and clamped on all sides. Clamping is done by plastic, wood or metal clamping profiles, with or without
rubber sealing strips, and fastened by nails, screws or bolts to the supporting frame. The frame itself can be made of wood or metal,
according to the design.
Figure 3a
Typical four sided clamp installation:
“wet” method, steel frame.
Figure 3a
Typical four sided clamp installation:
“wet” method, steel frame.
The table on top the next page presents the recommended center-to-center spans, for each type of SUNLITE sheet at various wind
or snow loads.
Фиксирующий профиль
Силиконовый герметик
Резиновые уплотнительные
прокладки с двух сторон
Остекление SUNLITE
Опорная рама
Clamping profile
Silicone sealant
Rubber packing strips
on both sides
SUNLITE glazing
Supporting frame