I have a two story existing historic building. The main floor was a restaurant and the 2nd floor was a hotel. We’re changing the upstairs to apartments and leaving the main floor as a restaurant. Do you base capacity on the building as a whole or each floor get their own capacity rating?
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Occupancy Classification and Capacity
- Thread starter mmckinzie
- Start date
If you a referring to occupant load, then the occupant load would be about the same on both stories, assuming the original hotel did not have any commercial spaces that would not be considered residential.
bill1952
SAWHORSE
If they do not share means of egress, I would calculate them separately, assembly (or business if under 50) for first floor and residential for second. If they do share m.o.e., then you have to combine them.
There are two means of egress upstairs. One would be shared, the other is not shared.
mtlogcabin
SAWHORSE
1004.2.3 Adjacent stories.
Other than for the egress components designed for convergence in accordance with Section 1005.6, the occupant load from separate stories shall not be added.
1005.3.1 Stairways.
The capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means of egress capacity factor of 0.3 inch (7.6 mm) per occupant. Where stairways serve more than one story, only the occupant load of each story considered individually shall be used in calculating the required capacity of the stairways serving that story.
Other than for the egress components designed for convergence in accordance with Section 1005.6, the occupant load from separate stories shall not be added.
1005.3.1 Stairways.
The capacity, in inches, of means of egress stairways shall be calculated by multiplying the occupant load served by such stairways by a means of egress capacity factor of 0.3 inch (7.6 mm) per occupant. Where stairways serve more than one story, only the occupant load of each story considered individually shall be used in calculating the required capacity of the stairways serving that story.
bill1952
SAWHORSE
So assuming two from residential 2nd story and two from assembly 1st story, and one from each converge in a foyer or lobby, the m.o.e. from that point to public way has to have capacity for 1/2 of each occupancy combined.
Does that help or have I missed a point?