Posted by Texasmark1 on May 24, 2020 at 04:53:44 from (172.243.92.145):
In Reply to: Re: New metal carport posted by Texasmark1 on May 24, 2020 at 04:31:10:
Another thought, not knowing how the different panels are installed and thus the benefit of the different shapes for strength, if you look at the deflection equation of a center force sitting on a beam supported on both ends, (relating a side panel supported by the vertical roof supports and the potential deflection at the center of the space between the posts due to wind load) the "height" of the "beam", thinking about a vertically mounted 2x4 vs 2x8 or whatever, that element is of the 3rd power whereas other parameters are first or second.
So a 2x4 vertically mounted (4" height) widget would have a height factor of 64. Doubling the height to a 2x8" gives a factor of 512 and tripling the height to 2x12" gives 1728. So if a 64# weight caused an initial deflection of 1" on the 4" beam, it would take a 512# weight to get 1" deflection on the 8" and a 1728# weight to get 1" on the 12". So, wind load resistance could be drastically improved by the shape of the beam.
Therefore, if the Zee or Receiver panels, due only to their cross sectional "width" difference for the same size, when installed amounted to a thicker dimension, your wind resistance would follow the above numbers and get stronger really fast.
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