Does anyone have a reference that specifies the fatigue category
for base metal with a small (say 1" dia) drilled or cored hole in it?
This is NOT a primary bolted or riveted connection as shown in the
typical fatigue category illustrations in AASHTO, AREA, and AISC;
the hole just permits a proposed retrofit appurtenance's bolt to
pass through the flange of a girder.
One of my refs says category A, which I want to hear, and the
other says category D. Category A is from the Structural
Engineering Handbook, 3rd Ed, by Gaylord^2 (illustration 28 on
page 4-8...but size of hole not shown, hole presumed centered),
and Cat D is from Bridge Engr Hdbk, 1st Ed, by Chen and Duan
D a v e E v a n s
T N H, I n c.