We are planning to make very long shelves from high quality Plywood and I'm trying to understand support distances / sag.
The shelves will be 2400mm x 261mm. The Plywood is 30mm thick premium Birch.
I've tried the sagulator but the only Plywood material option is fir and I'm unsure if this is a suitable comparison.
Are there any particular considerations for such long shelves and is the sagulator fir Plywood a suitable approximation? Also, is the "shelf span" value the target distance between supports - or the full length of the shelf?