Question

Which of the following considerations are important during inspection of the work in prestressed concrete works?

1. Sheathings are threaded properly including correct threading of couplers and taping of joints

2. Only approved sheathings, HTS strands, anchor heads and wedges are to be used.

3. Splicing of reinforcement to be provided at the joints
1. 1, 2 and 3
2. 1 and 2 only
3. 1 and 3 only
4. 2 and 3 only

Answer 1

Correct Answer - Option 2 : 1 and 2 only

Prestressing tendons are threaded after concreting and the diameter of the sheathing shall be at least 5 mm more than the diameter of the tendon and the sheathing ducts are spiral type. There is no splicing of reinforcement be provided at the joints of prestressing steels in a prestressed concrete member hence no such inspection is required.

Hence only statement 1 and 2 are correct.