_______________________________________________________________________ PROBLEM (9.50) For the bracket of b by h rectangular cross section, loaded as shown in Fig. P9.50, determine: (a) The maximum normal stress. (b) The location of the neutral axis. Given: P = 8 kips, b = 1in., h = 4 in. SOLUTION 1(4)3 = 5.33 in.4 12 P = 8 kips M = 8 × 10 3 ( 2) = 16 kip ⋅ in. (a) At the top fibers: P Mc 8 × 103 16 × 103 (2) σt = − = − A I 4 5.33 = 2 − 6 = −4 ksi A = bh = 1(4) = 4 in.2 I= At the bottom fibers: σ b = 2 + 6 = 8 ksi (b) Equation (9.13): 0 = 2 × 103 − y n = 0.667 in. 16 ×103 yn 5.33 σt N.A yn x σb Excerpts from this work may be reproduced by instructors for distribution on a not-for-profit basis for testing or instructional purposes only to students enrolled in courses for which the textbook has been adopted. Any other reproduction or translation of this work beyond that permitted by Sections 107 or 108 of the 1976 United States Copyright Act without the permission of the copyright owner is unlawful.