Komal Bhandakkar - Answers

Design of poured concrete on the shear wall:

• When the final f’c extrapolated from a break of 3 days then an additional break of 5 days (it is usually 3, 7 & 28 days), it is directly indicated that the first cylinder itself was defective.

• When the f’c of 5000psi was one of the 28th day (i.e. final) result, then it clearly indicates that it’s necessary to return the design engineer who is specified f’c 7000.

• It is really possible that he or she can review their previous calculations and determine lower compression that will still satisfy their own design.

• If it is not so then it will clearly requirement of other physical attributes like load, span, etc. it will have to be adjusted.

• Practically on a job, I was inspecting probably 3-day break spec, 5-day break, confirmed below fake spec.

• Usually, the contractor decided to tear the wall out and repour, but later on, it was determined to be a mechanical failure at the batch plant where only half the cement was batched.

• In case of another multi-storey hotel, it wasn’t the compression, it was the lack of adequate reconsolidation including vibration.

• When the forms where is stripped from a large, significance and poured in place shear wall, there were a large number of voids -some the size of a basketball.

• It was ultimately referred to the engineer, who specified filling a large number of voids with a simple compound.

• I personally didn’t feel particularly warm and fuzzy about the fix, but the engineer seemed more satisfied.

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• One example of which I know is that a cantilevered deck at an officer’s club, on a military base.

But after all, the testing fell short of the design, the general contractor, and batch plant manager approach to the officer in charge (Airforce colonel which is assigned to oversee the project) to propose one of the serious field testings to demonstrate that the cantilever would work.

Finally, he decided to redo it.

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Dear students,

Definition :

High rise building is that type of building which is taller than 15m height which people can willing to walk up and it also requires mechanically operated vertical Transportation systems.

No. of Floors in high rise building= greater than four (i.e. G + 3 Floors)

Electrical system :

The electrical system provided in high rise building depends on the utility of that building.

High Voltage wire is required for commercial building and it is considered hazardous.

The machine has its own fuse, there will be wire ways included in the floor slab.

Various types of electrical works carried out in high rise building:

• Fixing a standby diesel generator
• Each consumer has to be protected by a provision of an Earth leakage circuit breaker(ELCB)  to safeguard the persons against electrical shocks.
• All power sockets need to be earthed through an earth conductor and finally connected to ground pits.
• Solar power for high rise building is essential to fulfilling all requirements and reduces electricity consumption.
• Enhances energy conservation
• New technology:

              integrated building                      management system(IBMS)

1. Can monitor and control fire.
2. It has a security module for access control
3. Elevator control

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Safety is the first and foremost need of any country.

As per World Health Organisation (WHO) occupational health deals with all aspects of Health and safety in the workplace and has a firm focus on primary prevention of hazards.

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The reason behind why this India lack world-class safety practices that are normal in western worlds are as follows;

• Work organisations and working culture does not support the health and safety of workers.
• Lack of managerial system.
• No personnel policy regarding this issue.
• No idea about principles for participation.
• Lack of training policies.
• No quality management scheme for the undertaking.

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