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plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

(OP)
I'm looking into designing plywood shear walls considering the shear wall aspect ratio limitations.

I see in SDPWS 2008, that I apply a reduction of 2b/h to those shear walls that have aspect ratios between 2:1 and 3.5:1, but can I apply the reduction for just the shear walls that have aspect ratios between 2:1 & 3.5:1, or do I have to apply it to all the shear walls in the shear wall line if one or more shear walls in that line are between 2:1 & 3.5:1?

Any answers are much appreciated.

RE: plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

The effect is that the "individual wall" needs to have higher nailing values to sustain the same loads as the rest,

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

(OP)
Thank you very much for your quick reply.

So, from your comment, I can just apply the reduction to the individual walls that have aspect ratios between 2:1 & 3.5:1, and I don't have to apply it to those shear wall that have an aspect ratio less than 2:1 even if they occur within the same line. Is that correct?

RE: plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

Each wall in the same line is subject to that ratio, and if between 2:1 and 3.5:1, the nailing must be increased accordingly in each wall to have the same effective shear capacity as the walls that are 2:1 or less. Hopefully that is clear?

Mike McCann
MMC Engineering
http://mmcengineering.tripod.com

RE: plywood shear wall aspect ratio - apply reduction to individual wall or entire line?

(OP)
Yes, that works.

Thank you very much for your help.

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