Hello all, just have a few questions and am looking for some collaborative insight about how I should proceed with building my Octagonal wood pier foundation. The foundation uses a spoked wheel design to achieve the octagonal shape. The spokes are 12f spans of laminated 3ply 2x10s supported each by 2 piers: one at the center of the wheel and one 9 feet out.
My first question is what size of beams should I use to connect the spokes? these are 10 foot spans between the ends of each spoke. I think I need to add another ply to make these 4 ply beams but I'm not sure. Looking for any pointers from someone more knowledgable than I a photo of the layout is attached.
