30 November 1998
The nominal pull-over strength, Pnov shall be calculated as follows:
Pnov = 1.5t 1d w Fu1
dw = the larger of the screw head diameter or the washer diameter, and shall not be taken as
larger than 13 mm ( inch).
C16. WELDED CONNECTION DESIGN. Diagonal strap-to-column connection fillet weld design based
on AISI (E2.4 Fillet Welds) is summarized below. The design shear strength for loading in the
longitudinal direction, PL shall be determined as follows:
PL = 1 -
For L/t < 25
L = the length of fillet weld.
t = the least value of the thicknesses of the two members being welded.
PL = 0.75φLFu
For L/t ≥ 25
The design shear strength of loading in the transverse direction, PT shall be determined as follows:
PT = φLFu
For fillet welds to heavy strap material, thicker than 0.150 inches, the design shear strength for both
longitudinal and transverse loading due to weld failure, PW shall not exceed the following:
PW = 0.75φ w LFxx
tw = the effective throat, equal to 0.707 times the least leg of the weld in-plane or out-of-plane of
the materials being welded. A larger effective throat shall be permitted if measurement
shows that the welding procedure to be used consistently yields a larger value of tw.
Fxx = the weld metal strength designation in AWS electrode classification.
C17. ANCHOR FLARE BEVEL GROVE WELD DESIGN. Column-to-anchor flare bevel grove weld
design based on AISI (E2.5 Flare Grove Welds) is summarized below. The design strength of the
longitudinal loaded flare bevel grove weld, PG shall be determined as follows:
AISI Commentary, E2.4, indicates that this equation is needed to cover the possibility of weld failure through the throat of the weld
material, because tests that ensured tearing in the plate were not conducted on plates thicker than 0.15 inches.