How about 5% of the 40 ground floor units + 10% of the multistory units = 8 total?
I had a mathematical brain fart, let me try again:
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Proposed 100 unit public housing project in California has multiple nonelevator buildings. The buildings have both (40) ground floor units and (60) multistory units. The multistory units each have their primary entry on the ground floor, then an interior stair within the unit leads up to the rest of the dwelling unit on the second floor, so that makes it a "ground floor multistory unit".
- CBC 11B-233.3.1.1 requires 5 percent of the units to be mobility accessible. (5% x 100) = 5 mobility units.
- But wait: 11B-233.3.1.2.5 says that 10% of the ground floor multistory units must have an accessible primary entry, ground floor powder room and accessible route through the ground floor. 10% of 60) = 6 accessible ground floor multistory units.
So, are these 2 parts of the code really additive? Do I need to provide 5+6 = 11 units with various mobility features instead of just 5?
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Paul, CBC 11B-233.3.1.1 requires that 5% of the
total number of residential dwelling units comply with 809.2-809.4; and 809.2.1 requires an accessible route
throughout the unit, so 5% of the total 100 units must be mobility accessible flats (unless I want to provide a private elevator inside each mobility accessible unit).
It just seems odd to me that if I had 100 flats in a 2-story nonelevator building, I would only need 5 mobility accessible units; but if I have 40 flats and 60 townhomes in a 2-story building, I now need 11 mobility accessible units (5 flats, plus 6 townhomes with an accessible ground floor and powder room, etc.).
