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High Performance ThermoAcoustic Facade
In Karbonn Mobile Corporate Office at Bengaluru, the Managing Director’s cabin’s design intent was that of an airport lounge overlooking the runway. The cabin has a panoramic view of the old Bangalore HAL runway along with the ear drums damaging 220 db noise (at the open cabin location) of the MIG fighters taking off and landing twice a day!
The brief given was to engineer a façade which gives an un-interrupted view of the runway expanse with noise reduction performance. The second mandate was also to keep the AC load to its optimum level as the glass façade corner cabin orientation was facing towards the South- East.
After many iterations of structural and thermo-acoustic analysis, the designers derived the most cost effective solution of DGU panels with its outer facing pane acoustic PVB laminated. The panels were derived to be 35.52mm thick. Max panel sizes were in the range of 3.3Mtrs (Ht.) X 2.4Mtrs width. With panels over 500Kgs self weight the glass mullions specs were derived to be 25.52mm thick, 400mm depth and spliced to a height of 8.1Mtrs.
The open grounds of the runway were expected to impose heavy wind loads during the monsoon seasons, hence the designers were cautious in their wind load assumptions. Though the corner cabin façade itself was located only on the second floor of the building, the designers were conservative and considered 3.2KPa wind loads for the resultant critical forces.
As the point fixing of such heavy panels are not advisable, the designers looked for heavy load carrying clamps as a solution. Their specific structural requirements lead to consider SADEV, France S3000 series 2-way clamps. Clamps perform well in situations where-in thick and heavy façade panel reactions had to be transferred on to the primary structural members. Studio Form Techniques designed the SS 316 Grade custom made clamp to glass fins interface adaptors to transfer the panel reactions onto the 25.52mm thick tempered laminated glass mullions.