How many occupants can the client expect to have on the proposed additional level? Assume that the proposed additional level will be built with the same footprint as the building below, and round up to the nearest occupant.

84

occupants

Incorrect - the answer is 72

Based on the 2018 IBC, exercise rooms are allotted an occupant factor of 50 (gross). See Table 1004.5.

The case study scenario notes that the proposed additional level will be the same gross square footage as the building below (4,200 sf) and will be 85% efficient. Therefore, the size of the proposed exercise room will be:

4,200 sf x 0.85 = 3,570 sf

To find the number of occupants that are permissable in this space, divide the square footage by the occupancy factor found earlier:

3,570 sf / 50 occupants per gross square foot = 71.4 occupants, which rounds up to 72 occupants. (Note that the question requires rounding up.)

I don’t understand why did we take the net area not the gross?

Thank you