Quote:
Originally Posted by EzyStyles
hmm but is the wind really strong enough to do that?
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Wind pressure will vary directly to the square of the wind speed. Therefore a small increase in the wind speed will result in a much larger increase in the pressure. Here is some stuff I found on the web.
- A wind speed of 7.5mph will produce a force of 1.5 lbs/sq m.
- A wind speed of 12mph will produce a force of 4 lbs/sq m
- A wind speed of 18mph will produce a force of 8.6 lbs/sq m
- A wind speed of 24mph will produce a force of 16 lbs/sq m
- A wind speed of 30mph will produce a force of 26 lbs/sq m
So, if the wind is gusting at 24mph (38kph), and your tarps have an area of say, 10sq m, then the loading will be equivalent to 160lbs, or 72kgs.
At 30mph (48kph), it will be 260lbs or 118kgs.
These are not small forces and personally, I would be concerned with anything lashed to the gutter.
Cheers
Dennis