****INSTANT DOWNLOAD****PDF****Solutions Manual for Structural Steel Design (3rd Edition, 2020) by Aghayere – Covers All 13 Chapters

All13ChaptersCovered
b b b




SOLUTIONS

, Contents
Chapter1 ............................................................................................................................................ 1
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Chapter2 ............................................................................................................................................ 6
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Chapter3 ............................................................................................................................................ 23
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Chapter4 ............................................................................................................................................ 41
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Chapter5 ............................................................................................................................................ 55
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Chapter6 ............................................................................................................................................ 62
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Chapter7 ............................................................................................................................................ 74
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Chapter8 ............................................................................................................................................ 84
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Chapter9 ............................................................................................................................................ 92
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Chapter10 ...........................................................................................................................................109
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Chapter11 ...........................................................................................................................................119
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Chapter12 ...........................................................................................................................................137
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Chapter13 ...........................................................................................................................................154
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AppendixB ......................................................................................................................................... 159
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,Problem 1-4 b




The size and cross-sectional areas are obtained from Part 1 of the AISCM as follows:
b b b b b b b b b b b b b b




Size Self-weight (lb/ft.) b Cross-sectional area (in2) b b




W14x22 22 6.49
W21x44 44 13.0
HSS6x6x½ b 35.11 9.74
L6x4x½ 16.2 4.75
C12x30 30 8.81
WT18x128 128 37.7


Problem 1-5 b




a)

Element A y Ay I d = y-y
b b b
I + Ad2 b b




top flange b 21 26.25 551.25 3.94 -12.75 3418
web 21 13.5 283.5 1008 0 1008
bot flange b 21 0.75 15.75 3.94 12.75 3418
= b 63 in.2 b 850.5 I = 7844 in.4
b b b




Ay 850.5
y= = = 13.5 in.
b b




b b b b b




A 63
Self weight = (63/144)(490 lb/ft3) = 214 lb/ft.
b b b b b b b




b)

Element A y Ay I d = y-y
b b b
I + Ad2 b b




top plate b 2.63 18.26 47.93 0.03 -9.04 214.3
beam 10.3 9.23 95.02 510 0 510
bot plate b 2.63 0.188 0.49 0.03 9.04 214.3
= b 15.55 in.2 b 143.4 I = 939 in.4
b b b




Ay 143.4
y= = = 9.23 in.
b b




b b b b b




A 15.55
b




Self weight = (15.55/144)(490 lb/ft3) = 52.9 lb/ft.
b b b b b b b




c) From AISCM Table 1-20, Ix = 314 in.4
b b b b b b b b




Area = 13.8 in2 b b b




Self weight = 47.1 lb/ft. b b b b




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, Problem 1-7 b




Plot the idealized stress-strain diagram for a 6-in. wide by ½-in. thick plate and a 6-in. wide by 1-in. thick plate of
b b b b b b b b b b b b b b b b b b b b b




ASTM A36 steel. Assume that the original length between two points on the specimen over which the
b b b b b b b b b b b b b b b b b




elongation will be measured (i.e. the gage length) is 2-in.
b b b b b b b b b b




Solution:

Gage length, Lo = 2 in.
b b b b b




For 6 x ½-in. plate, Area = (6 in.)(½ in.) = 3 in2 E =
b b b b b b b b b b b b b b




29,000 ksi
b b




P Stress = P/A b b Strain,  = P/EA b b b Elongation, Lo = Strain x gage length = Lo b b b b b b b b




(kips) (ksi) (in.)
0 0 0 0
20 6.67 0.00023 0.00046
40 13.33 0.00046 0.00092
60 20.0 0.00069 0.00138
80 26.67 0.00092 0.00184
100 33.33 0.00111 0.00222
108 36.0 0.00124 0.00248



For 6 x 1-in. plate, Area = (6 in.)(1 in.) = 6 in2
b b b b b b b b b b b b




P Stress = P/A b b Strain,  = P/EA b b b Elongation, Lo = Strain x gage length = Lo b b b b b b b b




(kips) (ksi) (in.)
0 0 0 0
40 6.67 0.00023 0.00046
80 13.33 0.00046 0.00092
120 20.0 0.00069 0.00138
160 26.67 0.00092 0.00184
200 33.33 0.00111 0.00222
216 36.0 0.00124 0.00248


Problem 1-8 b




Determine the most economical layout of the roof framing (joists and girders) and the gage (thickness)
b b b b b b b b b b b b b b b




of the roof deck for a building with a 25 ft x 35 ft typical bay size. The total roof dead load is 25 psf and the
b b b b b b b b b b b b b b b b b b b b b b b b b b b




snow load is 35 psf. Assume a 1½” deep galvanized wide rib deck and an estimated weight of roof
b b b b b b b b b b b b b b b b b b b




framing of 6 psf.
b b b b




*Assume beams (or joists) span the 35’ direction b b b b b b b




* Assume 3-span condition b b




*Total roof load = (25psf + 35psf) – 6psf = 54psf
b b b b b b b b b b




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