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Readybuild: Pre-fabricated rebars ready-to-fix at site leading to faster construction

By
Sourav Dutta
Manager-Civil

Common Hazards/issues normally countered at all construction sites:

Human error in rebar fabrication (manual).
Fig 1 Incorrect bend
Fig 1 : Incorrect bend

Compromise with safety and quality.

Fig 2 Safety and Quality issues upon using rebar cutter
Fig 2 : Safety and Quality issues upon using rebar cutter

Procurement schedule delays affecting site progress, and thereby delaying project completion.

Inventory management. Capital locked in inventory.
Fig 3 Lack of space at site affects storage procurement
Fig 3 : Lack of space at site affects storage/procurement

Rebar pilferage.
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Higher Diameter Reinforcement- Leading to faster/cheaper construction

By
Sourav Dutta
Manager-Civil

The first version of BIS 1786 came out in 1985 when in Cl.5.1, the code suggested the nominal sizes as shown below:

Fig 1 (s) BIS1786-1985 and the relevant clause
Fig 1 (s) BIS1786-1985 and the relevant clause1
Fig 1 (s) : BIS1786-1985 and the relevant clause

The next version of the code BIS 1786 was introduced in 2008, where nominal sizes were rationalized and nominal sizes 7 mm, 18 mm, 22 mm, 45 mm and 50 mm had been removed. In Cl. 6.1, the code had suggested the nominal sizes as shown below:

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Higher grade reinforcement: Path to future

By
Sourav Dutta
Manager-Civil

The first version of BIS 1786 came out in 1985 where in Cl.1.1, the code had put the detailed physical and chemical properties, testing procedures of following strength grades of HYSD (High Yield Strength Deformed) bars/wires as shown below:

Fig 1 (s) BIS1786-1985 and the relevant clause

Fig 1 (s) BIS1786-1985 and the relevant clause1
Fig 1 (s) : BIS1786-1985 and the relevant clause

The next version of the code BIS 1786 was introduced in 2008, where new strength grade Fe600 had been introduced. Also, two categories based on elongation for each grade except Fe600 had also been introduced. Thus in Cl.1.1, the code had put the detailed physical and chemical properties, testing procedures of following strength grades of HYSD (High Yield Strength Deformed) bars/wires as shown below:

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High-rise canvas / Industrialization in India: Cheaper construction

By
Sourav Dutta
Manager-Civil

It is very clear that metro cities like Mumbai, Kolkata, Delhi and Bengaluru are having increasing development, with tier-II cities also coming up in competition, leading to large land/plot size unavailability. Accommodating increasing population will require the FSI (Floor-space index) / FAR (Floor-area ratio) to be higher.

Fig 1 High-Rise Canvas over the world now-a-days
Fig 1 : High-Rise Canvas over the world now-a-days

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Myths on Beam construction – Challenge to overcome

By
Sourav Dutta
Manager-Civil

There are a number of ways in which the superstructure can be built. In areas where average to good quality bricks are available, the walls of houses for two to three storeyed constructions can be built out of bricks with the slabs, lintels, chajja etc. in reinforced concrete. Such construction is supported entirely on load bearing brick walls (Fig 1), foundation of which ultimately transfers the building load to underneath soil.


Fig 1: Load Bearing Construction on brick

Fig 2 RCC framed construction
Fig 2: RCC framed construction

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