The inspections carried out by local authorities while construction are as follows :-

Quality and progress :-

1. Condition surveys of neighbouring structures prior to commencement of the works.
2. Regular valuation inspections to assess progress of the works in order to value interim payments.
3. Inspecting mock ups and samples and witnessing tests.
4. Witnessing commissioning.
5.Inspection prior to certification of practical completion.
6. Inspection after handover of the site to the client on certification of practical completion.
7. Inspection at the end of the defects liability period to prepare a schedule of defects.
8. Inspection on completion of the rectification of defects set out on the schedule of defects.

Health and safety :-

1. Prevention of falls and personal fall protection systems.
2. Work at height.
3. Work platforms such as scaffold and mobile platforms.
4. Ladders and stepladders.
5. Personal protection equipment, including head protection.
6. Plant, vehicles and other equipment.
7. Storage.
8. Electrical systems.
9. Asbestos risk.
10. Provision of welfare facilities such as toilets and handwashing facilities.
11. Site conditions and order.
12. Avoidance of obstructions.
13. Management of respiratory risks.
14. Structural stability.
15. Prevention of unauthorised access to the site.

Building control :-

1. Excavations, before filling.
2. Foundations before covering up.
3. Damp proof course.
4. New drains before covering up.
5. Ground beams and steelwork.
6. Insulation.
7. Roof construction.
8. Completion.

Here, because water tanks are more vulnerable structures and plus the tank is sometime overfilled and sometime empty, the pressure inside is so varying,

It needs more safety precautions and as we all know working stress method assumes more safety factor than limit state design, which is an economical design, we prefer to use working stress method…