Is this an important problem ?

hello all ! I was dicussing a problem concerning the design of my project with Rod Gervais when he pointed out on my drawing that my partition between the Tracking Room and the Control Room would lead to a Triple leaf Problem. I understand that there may be a problem here, but at the time Rod did'nt know that there would be hollow (9,8 feet wide X 6,5 feet high) in this wall for the windows of the two opposite walls. I redid my drawing with more informations I have to deal on the fact that this wall is part of the support for the first floor (second in the States ?) Would someone be kind enough to have a look at it and tell me if this is a major problem ? As this partition wall still exists if i have to tear it apart i may have to replace it by huge vertical metal studs and a big horizontal one to support the floor on this side of the building. this would lead also to a major source of unexpected expense. Thanks all and everybody have a Goooood 2007 Year !!!!! Philippe

Philippe - Rod's correct. You also have a triple leaf to the upstairs rooms. All you need do is remove the inner walls in the control room area. Then you will have a double leaf to the tracking room, and a double leaf to the upstairs rooms and a single leaf to the entrance area which probably isn't important. BTW - well done doing the drawing excel - great idea if you don't have a drawing program :D cheers john

John thank you for helping how about this new version ? I changed the third wall for metal pillars (3 or 4 i don't know for the moment) supporting the first floor on this side, but kept the three other walls I did a new drawing showing the two floors from upside I hope i am correct this way Philippe

Yes Philippe - that solves the tracking room to control room leaf, but you still have a triple leaf vertically. Do you really need to float the floors upstairs?? cheers john

John correct me if i am wrong but how can you isolate the first floor studios from the control room (for example) whithout floating the floor I understand that if i don't do that (at least a small layer of compressed glasswool) there would be sound transmission between the ground floor and the first floor ???? Philippe

It's actually the other way around - by building a room within a room main control room you are isolating the control room from the upstairs. the amount of flanking, associated with the upper floor, from room to room will be minimal and I wouldn't think it would be a problem as none of the upper rooms are actual recording rooms, just mixing and editing etc. cheers john

John i clearly understand what you mean here and i agree with you OK Done for the vertcal flanking How about the horizontal one upstairs ? I tend to think that it is it necessary to build the partitions between rooms upstairs on separate floors in order to avoid flanking between them. How do i do this ? Philippe

Philippe - it really depends on what flooring you are gong to put into those rooms. The concrete slab method you posted is expensive as you'd need a concrete pump etc to get it all up there. Both Oasis and Left Bank have their walls on rubber on the floor - the timber floor was added after the walls were built and it sits on 2" x 3" battens on rubber also. cheers john

John i think i get the point but a picture is worth a thousand words, would you be kind enough to point me to some link in the forum with such a design ? I don't want to make a mistake here Philippe