CBI OFFICE BUILDING, BKC, MUMBAI, G – Block at Bandra – Kurla Complex, Mumbai - Technology
Project Name : CBI OFFICE BUILDING, BKC, MUMBAI, G – Block at Bandra – Kurla Complex, Mumbai
Central Bureau of Investigation (CBI) was allotted a land of 1500 sqm at C-35 A, G – Block at Bandra – Kurla Complex, popularly known as BKC at Mumbai by Mumbai Metropolitan Region Development Authority (MMRDA). They entrusted the work of project management to Central Public Works Department (CPWD). CPWD appointed M/s Enarch Consultant Private Limited as the consultant. Initially it was planned to have 2 Basements + Ground + 10 storeyed structure but later to cope up the requirements, the building was planned with 2 Basements + Ground + 13 storeyed structure. Since plot size was very small and space requirements of CBI were high, full FSI of 4 was utilised and also some FSI was purchased through making payment of the premium to MMRDA as per their guidelines. Total built up area planned including basements was of the order of 10,500 sqm. Accordingly the plans were got sanctioned. CBI building in Mumbai has been constructed with latest norms conforming to all the requirements of the local bodies. It houses almost all the offices under one roof. The building is occupied fully and is operational from March 2016 onwards. Important features of the project were adoption of new materials and techniques, 4 star GRIHA rating and accommodating services including required parking as per local bylaws in the plot. The building has achieved prestigious CIDC best project award, CPWD best completed project and IBC award.
Lakh
Project Budget
01 Jan 2018
Start Date
01 Jan 2019
Completion Date
Mumbai
Location
Project Team / Contact Us
| S.No. | Name(Mr/Mrs) | Designation | Office Address | Office Number | Mobile Number | Email ID |
|---|---|---|---|---|---|---|
| 1 |
TECHNOLOGY
Multi-storeyed construction is not now by choice but a necessity due to scarcity and high cost of land. Large module and span are now preferred particularly in office and commercial buildings due to economy in construction. It is also desired that more units can be accommodated in same height of the building to minimise the cost per unit area of constructed space.
In the offices, commercial and institutional buildings, centralised air-conditioning is also required due to temperature shooting up during summer in most parts of the country. Therefore, architects and engineers have to adopt a technology by which size of air-conditioning duct is minimised and beams are either eliminated or their sizes get reduced. Even in case of residential buildings if beams are eliminated, higher headroom can be achieved and within the same height, more number of storeys can be planned thereby reducing the cost of a unit.
Post tensioned construction technology offers the advantage of elimination or reduction in sizes of beams and slabs hence, in future such technology is going to replace traditional RCC construction in India.
Material saving
- Reduction in concrete due to thinner concrete members.
- Reduction in rebar in floor elements.
- Reduction in dead load resulting into saving in concrete and reinforcement of structural members including foundation.
- Saving in building cladding, vertical mechanical/service elements, rebar and concrete in shear walls and other materials due to lesser sizes.
Faster construction
- Potential pour cycle of 3-4 days.
- Reduced re-shoring.
- Better coordination with embeds and MEP openings.
Increased performance
- Improved seismic behavior.
- Reduced deflection and vibration.
- Improved crack control and water proofing properties, especially beneficial for parking garages and balconies.
- Longer spans and fewer columns giving greater flexibility in floor layouts in office/residential buildings and better lighting in parking garages which enhances personal safety.
Reduced lifetime cost
- Lower maintenance and lifecycle cost.
- Reduced building height resulting to higher headroom and energy savings.
- Potential to conform to green building norms.
Pre-stressed concrete design is more suitable for long span structures and those carrying heavy loads. Pre-stressed structures are slender and thus yield to more clearance. They do not crack under working loads and dead loads, and the deflection is reduced due to cambering effect of pre-stress.
Implementation Strategy
| S.No. | Description | Images | ||||
|---|---|---|---|---|---|---|
| 1 | Structural Arrangement - The building was designed as RCC framed structure. Post Tensioned slabs were designed for all the floors to have large headroom as the building was fully air-conditioned. AHUs were placed on the lofts of the toilet blocks to economise the space. Structural glazing was designed and tested as per the requirements. Autoclaved aerated concrete (AAC) blocks were used in the infill walls. Post Tensioned (PT) slab - PT slabs were as adopted in all the floors. It provided extra headroom which was required for the services. PT slab has the advantages of increased clear spans, extra headroom, reduced storeyed height to enable more storeys in same height of the building, thinner slab, lighter structure, reduced cracking and deflections, and quality and skilled work. It is particularly economic in case of multi-storeyed buildings. Limitation of the PT slab is that it has to be insured that it is never cut or drilled which may cause the failure of the structure. |
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| 2 | Dry stone cladding - External facade has the cladding of ACP sheets and dry granite stones. For this, special arrangements were made to fix the stones. The stones were placed on four stainless steel pins as shown in figure. Each pin was inserted into two stones in which holes were drilled first.
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| 3 | Double stack mechanised car parking - Double stack mechanised car parking was used in the basements as it saved the space and also accommodated the required parking as per local bylaws. |
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| 4 | Green Building Features -
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| 5 | Structural Glazing - Structural glazing was provided on external walls which also helped in reduction of the weight of the structure. The glazing was designed and tested for required loading. Main important feature of the structural glazing was to abide the requirements of the fire authorities. Glass - Glass was used partly in the partitions to bring the external light inside the halls. The officer’s cabins were planned on periphery of the building while halls were planned in the centre for the staff. Glass was used in the partitions to bring light inside and in the lobby. In the lobby, fire rated toughened glass was used. |
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| 6 | Itailan Marble Flooring - In the main lobby and lift lobbies, Italian marble flooring was used for aesthetic purposes. |
|
||||
| 7 | Foldable Partition - In the auditorium cum training centre, Dorma foldable partition was provided so that it can be used for large gathering by combining the two. |
|
||||
| 8 | Other features - Includes all security equipments, intelligent fire alarm system, Intelligent building management system, complete networking, construction of diaphragm wall around the basements, smoke extraction fans in the basements, gas based fire suppression system, sensor based lights in cabins and toilets, variable frequency drive chillers and AHUs, and silent DG set. The building is designed as disabled friendly. Lifts are provided with Brail language. |
|
Lessons Learnt / Take Aways
Project Name : CBI OFFICE BUILDING, BKC, MUMBAI, G – Block at Bandra – Kurla Complex, Mumbai
Central Bureau of Investigation (CBI) was allotted a land of 1500 sqm at C-35 A, G – Block at Bandra – Kurla Complex, popularly known as BKC at Mumbai by Mumbai Metropolitan Region Development Authority (MMRDA). They entrusted the work of project management to Central Public Works Department (CPWD). CPWD appointed M/s Enarch Consultant Private Limited as the consultant. Initially it was planned to have 2 Basements + Ground + 10 storeyed structure but later to cope up the requirements, the building was planned with 2 Basements + Ground + 13 storeyed structure. Since plot size was very small and space requirements of CBI were high, full FSI of 4 was utilised and also some FSI was purchased through making payment of the premium to MMRDA as per their guidelines. Total built up area planned including basements was of the order of 10,500 sqm. Accordingly the plans were got sanctioned. CBI building in Mumbai has been constructed with latest norms conforming to all the requirements of the local bodies. It houses almost all the offices under one roof. The building is occupied fully and is operational from March 2016 onwards. Important features of the project were adoption of new materials and techniques, 4 star GRIHA rating and accommodating services including required parking as per local bylaws in the plot. The building has achieved prestigious CIDC best project award, CPWD best completed project and IBC award.
Lakh
Project Budget
01 Jan 2018
Start Date
01 Jan 2019
Completion Date
Mumbai
Location
Project Team / Contact Us
| S.No. | Name(Mr/Mrs) | Designation | Office Address | Office Number | Mobile Number | Email ID |
|---|---|---|---|---|---|---|
| 1 |
TECHNOLOGY
Multi-storeyed construction is not now by choice but a necessity due to scarcity and high cost of land. Large module and span are now preferred particularly in office and commercial buildings due to economy in construction. It is also desired that more units can be accommodated in same height of the building to minimise the cost per unit area of constructed space.
In the offices, commercial and institutional buildings, centralised air-conditioning is also required due to temperature shooting up during summer in most parts of the country. Therefore, architects and engineers have to adopt a technology by which size of air-conditioning duct is minimised and beams are either eliminated or their sizes get reduced. Even in case of residential buildings if beams are eliminated, higher headroom can be achieved and within the same height, more number of storeys can be planned thereby reducing the cost of a unit.
Post tensioned construction technology offers the advantage of elimination or reduction in sizes of beams and slabs hence, in future such technology is going to replace traditional RCC construction in India.
Material saving
- Reduction in concrete due to thinner concrete members.
- Reduction in rebar in floor elements.
- Reduction in dead load resulting into saving in concrete and reinforcement of structural members including foundation.
- Saving in building cladding, vertical mechanical/service elements, rebar and concrete in shear walls and other materials due to lesser sizes.
Faster construction
- Potential pour cycle of 3-4 days.
- Reduced re-shoring.
- Better coordination with embeds and MEP openings.
Increased performance
- Improved seismic behavior.
- Reduced deflection and vibration.
- Improved crack control and water proofing properties, especially beneficial for parking garages and balconies.
- Longer spans and fewer columns giving greater flexibility in floor layouts in office/residential buildings and better lighting in parking garages which enhances personal safety.
Reduced lifetime cost
- Lower maintenance and lifecycle cost.
- Reduced building height resulting to higher headroom and energy savings.
- Potential to conform to green building norms.
Pre-stressed concrete design is more suitable for long span structures and those carrying heavy loads. Pre-stressed structures are slender and thus yield to more clearance. They do not crack under working loads and dead loads, and the deflection is reduced due to cambering effect of pre-stress.
Implementation Strategy
| S.No. | Description | Images | ||||
|---|---|---|---|---|---|---|
| 1 | Structural Arrangement - The building was designed as RCC framed structure. Post Tensioned slabs were designed for all the floors to have large headroom as the building was fully air-conditioned. AHUs were placed on the lofts of the toilet blocks to economise the space. Structural glazing was designed and tested as per the requirements. Autoclaved aerated concrete (AAC) blocks were used in the infill walls. Post Tensioned (PT) slab - PT slabs were as adopted in all the floors. It provided extra headroom which was required for the services. PT slab has the advantages of increased clear spans, extra headroom, reduced storeyed height to enable more storeys in same height of the building, thinner slab, lighter structure, reduced cracking and deflections, and quality and skilled work. It is particularly economic in case of multi-storeyed buildings. Limitation of the PT slab is that it has to be insured that it is never cut or drilled which may cause the failure of the structure. |
|
||||
| 2 | Dry stone cladding - External facade has the cladding of ACP sheets and dry granite stones. For this, special arrangements were made to fix the stones. The stones were placed on four stainless steel pins as shown in figure. Each pin was inserted into two stones in which holes were drilled first.
|
|
||||
| 3 | Double stack mechanised car parking - Double stack mechanised car parking was used in the basements as it saved the space and also accommodated the required parking as per local bylaws. |
|
||||
| 4 | Green Building Features -
|
|
||||
| 5 | Structural Glazing - Structural glazing was provided on external walls which also helped in reduction of the weight of the structure. The glazing was designed and tested for required loading. Main important feature of the structural glazing was to abide the requirements of the fire authorities. Glass - Glass was used partly in the partitions to bring the external light inside the halls. The officer’s cabins were planned on periphery of the building while halls were planned in the centre for the staff. Glass was used in the partitions to bring light inside and in the lobby. In the lobby, fire rated toughened glass was used. |
|
||||
| 6 | Itailan Marble Flooring - In the main lobby and lift lobbies, Italian marble flooring was used for aesthetic purposes. |
|
||||
| 7 | Foldable Partition - In the auditorium cum training centre, Dorma foldable partition was provided so that it can be used for large gathering by combining the two. |
|
||||
| 8 | Other features - Includes all security equipments, intelligent fire alarm system, Intelligent building management system, complete networking, construction of diaphragm wall around the basements, smoke extraction fans in the basements, gas based fire suppression system, sensor based lights in cabins and toilets, variable frequency drive chillers and AHUs, and silent DG set. The building is designed as disabled friendly. Lifts are provided with Brail language. |
|
Lessons Learnt / Take Aways
| S.No. | Description | Images | |
|---|---|---|---|
| 1 |
CBI building in Mumbai has been constructed with latest norms conforming to all the requirements of the local bodies. It houses almost all the offices under one roof. The building is occupied fully and is operational from March 2016 onwards. The building has achieved prestigious CIDC best project award, CPWD best completed project and IBC award. |
|