Typ. ?

[Frank]

What is abbreviated by "Typ." ?

I imagine it is "typically" but I don't know.
Practice makes it clear that the nominal measurement may not turn out to be the actual measurement.
In this case, there are 33 lightening holes at 3 1/8 and 2 more at 3 1/8.
Mine are turning out to be closer to 2 7/8 but I have to think about each one.
I'm having a great time laying out the rear spar. It's full of little puzzles.

[Chewie]

Yup, typical of 33 features. The hole diameters on the rear spar drawing should be pretty close to actual as far as I recall.

[Frank]

I found that I can lay out 3 1/8 holes for the ones that are flanged.
But the holes between cap strips have to be 3 inches. Also at the splice plate.
Part of this is due to the spar bend radius (front and rear) is just a little bit larger than specified.
This means the cap strips can't get quite as tight into the bend as we might like.