ORIGINAL: npaden
Okay, you don't have to believe me but the piece of calculator tape in my hand from yesterday (I'm an accountant)actually ended up at 288"!

That seemed a little high to me so that's why I went with 280"ish.
Of course I was probably off on most of the individual measurements.
On the left side I went G1 - 15", G2 - 12", G3 - 15", G4 - 20", G5 - 2"
On the right side I went G1 - 15", G2 - 10", G3 - 6", G4 - 20", G5 - 5"
I gave both main beams 36" and the inside spread 36" and gave the circumference measurements 30" for each side.
P.S. - That is Gross Score. With the weak right side it would get knocked down a bit on the Net.
Here is the exact measurement.
Left side G1-16 7/8, G2-14 4/8, G3-12 3/8, G4-15, G5-3 7/8, G6-4 2/8
Right side-G1-17 2/8, G2-9 3/8, G3-5 1/8, G4-14 7/8, G5-5, G6-6 4/8
Main beams were 41 Left and 42 Right
Inside spread 38"
I don't know what you mean by 30" for circumference measurements unless you are adding then I have Left 20 7/8 and Right side 21 5/8
All in all great guessing off a picture.