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...


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Q2 (a) A steel cable with nominal diameter 25 mm as shown in Table Q2(a) is used in a<br>construction yard to lift a bridge section weighing 38 kN, as shown in Figure Q2(a).<br>The cable has an effective modulus of elasticity E = 140 GPa.<br>(i) If the cable is 14 m long, how much will it stretch when the load is picked up?<br>(ii) If the cable is rated for a maximum load of 70 kN, what is the factor of safety with<br>respect to failure of the cable?<br>

Extracted 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?
Table Q2(a): Properties of steel cables<br>Ultimate load<br>Nominal diameter Approximate weight Effective area<br>(Failure load)<br>mm<br>N/m<br>mm?<br>kN<br>12<br>6.1<br>76.7<br>102<br>20<br>13.9<br>173<br>231<br>25<br>24.4<br>304<br>406<br>32<br>38.5<br>481<br>641<br>38<br>55.9<br>697<br>930<br>44<br>76.4<br>948<br>1260<br>50<br>99.8<br>1230<br>1650<br>di<br>d2<br>C<br>D<br>A<br>B<br>P<br>P<br>Figure Q2(b)<br>

Extracted text: Table Q2(a): Properties of steel cables Ultimate load Nominal diameter Approximate weight Effective area (Failure load) mm N/m mm? kN 12 6.1 76.7 102 20 13.9 173 231 25 24.4 304 406 32 38.5 481 641 38 55.9 697 930 44 76.4 948 1260 50 99.8 1230 1650 di d2 C D A B P P Figure Q2(b)

Jun 11, 2022
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