Turtle deck grain direction

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Little Scrapper

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A or B?

I’m gonna build a turtle deck tomorrow and need to lay it out on mahogany plywood. There’s 4 bulkheads put together with stringers. Standard affair.

Metal is my strength in life, Wood is definitely my weakest link so I’m at a loss here guys. I’m guessing it doesn’t matter but there’s gotta be a slight difference in stiffness?

Which would you pick?
6F95FAE8-A5C7-43B1-88D0-3EF0251CFEB5.jpeg
 

TiPi

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to get the best of both grain directions, I would laminate 2x 1/8" ply at 90deg. This is done on some critical areas like firewall, main spar web etc. That also provides additional stiffness in both directions.
 

Pops

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Highly load places I would do the 2X 1/8" ply for the 1/4". But in the turtle deck , I would go with "B".
 

Chilton

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If it will fit on the sheet I would actually go for +/- 45 degree grain, but I doubt it really makes a big difference.
 

Little Scrapper

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I actually had to go with A, turns out TFF was right about fit. I had no choice. Built all 4 bulk heads and they turned out well. Very stiff.

Making the stringers this afternoon.

Appreciate the input, thanks!
 
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