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Q 21. How does workmanship in erection affect the strength of tower?

Ans: Self supporting tower has a large number of members. Quite large number of members are only marginally different from each other. If during erection, erectors fix a member with slightly larger length in position of member with smaller length, then the member will be stressed even without any external load. The strength of the member will be compromised to that extent. If the tightening sequence is not properly followed , then that will also result in stresses in members of tower.