ORIGINAL: foxflyer
I would still use shear webs with alternating half ribs correct? Initially, and maybe still, I was thinking of using every 3rd rib, there are 14 on the 98" version, and using 1/32 for the sheeting.
I would build something similar to the e-flite mini-Ultrastick wing which has a 37.75 inch wingspan. Full ribs are 4.375 inches apart with half ribs in between. The center section is fully sheeted and it is half sheeted (D-tube) out to the first full rib away from the fusilage. I'm not sure what the spar is made out of but I would bet that two 1/4 inch square hard balsa spars joined by sheer webbing would be adequate. I haven't folded this wing yet.