2016 CBC vs. 2016 CPC

[Kris Johnson]

I am working on a spreadsheet that calculates occupant load and plumbing fixture counts based on room types and their square footages (see link to picture below). The problem I am running into is how to translate a "Function of Space" from CBC Table 1004.1.2 into a Plumbing "Occupancy" from CPC Table A. Below is a second link to a picture comparing the two and as you can see it has several holes. Anyone know where I can find the information to fill out the rest?

For example: In the building code a skating rink is an A-4, but there is no A-4 on Table A in the plumbing code.

https://www.dropbox.com/s/qdograta0mivfb9/Building Analysis 01.JPG?dl=0
https://www.dropbox.com/s/efr6kris49u6y83/Building Analysis 02.JPG?dl=0


Thank you,
Kris

 

[cda]

Welcome

Not a plumber, but sometimes there are so many scenarios with codes, it is hard to develop cheat sheets

Thanks for your contribution

 

[RLGA]

The function of space does not directly correlate with occupancy group. For example, you show that an unconcentrated assembly without fixed seats is automatically a Group A-2, but an unconcentrated assembly without fixed seats can be a lobby (Group A-3 if over 49 occupants) or a conference room (Group B if less than 50 occupants).

Your example shows four exercise rooms. Two of those have occupant loads greater than 49, and are correctly classified as Group A-3. The other two have occupant loads less than 50, and these would not be classified as Group A, but as Group B per Section 303.1.2, subparagraph 1 (2015 IBC).

Another thing I noticed is that the square footage column is marked as "Net." Most occupant load factors do not apply to net floor areas, but to gross floor areas.