Page 63 - Handbook of Structural Steel Connection Design and Details

Design of Connections for Axial, Moment, and Shear Forces

48 Chapter Two

26.2
H 5 P 5 855 5 617 kips
B
r 36.3
e 7.15
5 b P 5 855 5 168 kips
V B
r 36.3
2. Gusset-to-column: The loads are 412 kips shear and 0 kips axial.
a. Bolts and clip angles:
1
Bolts: A325SC-B-N 1 / ; standard holes, serviceability criterion
8
1
Clip angles: try Ls 4 4 / 2
Shear per bolt is
V 413 / 29.5 kips 31.6 kips, ok
14
The bearing strength of the clip angle is
r 0.75 2.4 58 0.5 1.125 58.7 kips > 31.6 kips
p
The bearing strength of the W14 109 column web is
r 0.75 2.4 65 0.525 1.125 69.1 kips > 31.6 kips
p
The bolt tearout capacity of the edge bolts at the clip angles is
r 0.75 1.2 (2 0.594) 0.5 58 36.7 kips > 31.6 kips, ok
p
There is no edge tearout condition at the column web, so it does
not govern.
The net shear strength of the clips is
R 0.75 0.6 58 (28 7 1.25) 0.5 2
n
502 kips > 412 kips, ok
The gross shear strength of the clips is
R 1.00 0.6 36 28 0.5 2 605 kips > 412 kips, ok
n
Block shear on the clip angles
A 26 0.5 13.0 in 2
gv
A (26 6.5 1.25) 0.5 8.94 in 2
nv
A (1.5 0.5 1.25) 0.5 0.438 in 2
gt
R 0.75 [0.438 58 min {0.6 36 13.0, 0.6
bs
58 8.94}] 2
459 kips > 412 kips, ok
b. Fillet weld of clip angles to gusset: The length of this clip angle weld
is 28-in. From AISC 13th Edition Manual Table 8-8, l 28, kl
3.0, k 0.107, al 4 xl 4 0.009 28 3.75, and a 0.134.
By interpolation, c 2.39, and the required fillet weld size is D
412/(0.75 2.39 28 2) 4.11, so the required fillet weld size
3
is 5/16, and no proration is required because of the / -in thick
4
gusset. (See Table 1.9 Chapter 1).

Downloaded from Digital Engineering Library @ McGraw-Hill (www.accessengineeringlibrary.com)
Copyright © 2009 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.