Page 110 - Structural Steel Designers Handbook AISC, AASHTO, AISI, ASTM, and ASCE-07 Design Standards

Brockenbrough_Ch03.qxd 9/29/05 5:05 PM Page 3.42

CONNECTIONS

3.42 CHAPTER THREE

W8 15

1 1 / 2" 1 2 1 2

3"
3 4
1 1 / 2 "
3/8 PL (A36)

3 4
7/8" A490X bolts

(a) (b)
FIGURE 3.27 Illustration of bolt bearing/tear-out limit state. (a) As connected.
(b) Showing tear-out.

Design bearing strength of the plate [Eq. (3.28a)]:
φR n = 0.75(2.4)(0.875)(0.375)(58) = 34.3 kips/bolt
Design strength for bolt tearing out through the edge of the strut web:

15
φR n =φ1.2L c tF b = (0.75)(1.2)(1.5 − / 32)(0.245)(65) = 14.7 kips/bolt
Design strength for bolt tearing out between bolt holes in the strut web:

15
(0.75)(1.2)(3 − / 16)(0.245)(65) = 29.5 kips/bolt
Design strength for bolt tearing out through the edge of the plate:

(0.75)(1.2)(1.5 − / 32)(0.375)(58) = 20.2 kips/bolt
15
Design strength for bolt tearing out between bolt holes in the plate:
15
(0.75)(1.2)(3 − / 16)(0.375)(58) = 40.3 kips/bolt

Downloaded from Digital Engineering Library @ McGraw-Hill (www.digitalengineeringlibrary.com)
Copyright © 2004 The McGraw-Hill Companies. All rights reserved.
Any use is subject to the Terms of Use as given at the website.