A steel cable with nominal diameter 25 mm as shown in Table Q2(a) is used in a construction yard to lift a bridge section weighing 38 kN, as shown in Figure Q2(a). The cable has an effective modulus of elasticity E =140 GPa. (i) If the cable is 14 m long, how much will it stretch when the load is picked up? (ii) If the cable is rated for a maximum load of 70 kN, what is the factor of safety with respect to failure of the cable?
A steel cable with nominal diameter 25 mm as shown in Table Q2(a) is used in a construction yard to lift a bridge section weighing 38 kN, as shown in Figure Q2(a). The cable has an effective modulus of elasticity E =140 GPa. (i) If the cable is 14 m long, how much will it stretch when the load is picked up? (ii) If the cable is rated for a maximum load of 70 kN, what is the factor of safety with respect to failure of the cable?
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Transcribed Image Text:Table Q2(a): Properties of steel cables
Ultimate load
Nominal diameter Approximate weight Effective area
(Failure load)
mm?
kN
102
mm
N/m
12
6.1
76.7
173
20
13.9
231
25
24.4
304
406
32
38.5
481
641
55.9
76.4
38
930
1260
697
44
948
50
99.8
1230
1650
Figure Q2(a)
Transcribed Image Text:Q2 (a) A steel cable with nominal diameter 25 mm as shown in Table Q2(a) is used in a
construction yard to lift a bridge section weighing 38 kN, as shown in Figure Q2(a).
The cable has an effective modulus of elasticity E = 140 GPa.
(i) If the cable is 14 m long, how much will it stretch when the load is picked up?
(ii) If the cable is rated for a maximum load of 70 kN, what is the factor of safety with
respect to failure of the cable?
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