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perforated plywood shear wall equation (improved)

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Thanks again.

I have broken down the equation to the variables in the IBC2000 and they

Reference table 2305.3.7.2
Here is the equation  Co = 100/(A(1-3B)+3B)

Let A= the ratio of maximum opening height to the wall height.
That?s the value across the top of the chart.

Let B= percent of full height sheathing to full length of wall.
That?s the left column on chart.

Co = Shear adjustment factor for V/(full height sheathing)

David Merrick