drubinoff
Member
Hi,
Here in Massachusetts, I am designing an addition to a small two-storey mixed-use building with a semi-finished basement. The existing second floor will be gutted, the roof removed, and a third storey built. The second storey will have a change of use. There will likely be some reworking of stairs on the first floor. Each storey has the same footprint, although the new third storey will be have setbacks.
I'm looking at the 2009 IEBC §405, where a Level 3 alteration applies where the work area exceeds 50% of the aggregate area of the building.
With the basement being a stock room for the first floor retail store, how do I decide whether to count that floor as being part of the overall building area? No changes are planned for the basement.
Secondly, in tabulating the "aggregate area" of the building, should I be including the area of the proposed building? I'm trying to understand "50%" of what, exactly. Old area? New area including the addition?
Thanks,
Derek
Here in Massachusetts, I am designing an addition to a small two-storey mixed-use building with a semi-finished basement. The existing second floor will be gutted, the roof removed, and a third storey built. The second storey will have a change of use. There will likely be some reworking of stairs on the first floor. Each storey has the same footprint, although the new third storey will be have setbacks.
I'm looking at the 2009 IEBC §405, where a Level 3 alteration applies where the work area exceeds 50% of the aggregate area of the building.
With the basement being a stock room for the first floor retail store, how do I decide whether to count that floor as being part of the overall building area? No changes are planned for the basement.
Secondly, in tabulating the "aggregate area" of the building, should I be including the area of the proposed building? I'm trying to understand "50%" of what, exactly. Old area? New area including the addition?
Thanks,
Derek