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Determining Occupancy, Building Massing, and Construction Types [Exercise B]
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Take the sum of all occupants of each space to get the total occupancy-
Can you list out occupants for each space? How you sum up to get 153 occupants?
@Mei-Po.Leung For this question, you’ll refer to both the provided Library Floor Plan and IBC Table 1004.5 to determine the occupant load of each space:
| Space |
Area (sf) |
Occupancy Load Factor |
# Occupants |
| Reception |
190 |
150 |
2 |
| Private reading rooms |
300 |
50 |
6 |
| Seating (unconcentrated tables & chairs) |
164 |
15 |
11 |
| Stacks |
1,522 |
100 |
16 |
| Offices |
666 |
150 |
5 |
| Storage |
44 |
300 |
1 |
| Lecture Hall |
743 |
7 |
107 |
| Stage |
73 |
15 |
5 |
| Total |
|
|
153 |
I will update the answer explanation in the exercise so that this detail is included.
Hope this helps!
Kiara Galicinao, AIA, NCARB
Product Coordinator
Black Spectacles
in the reference floorplan the number for the seating by the Stacks is shown as “1644” not “164”. Is it like this for anyone else?
Its showing 1644 for me too!
@alongoria @sedona.quimby I’m so sorry for the confusion - that was a typo! I just updated the Library Floor Plan reference so it says ‘164 SF’ correctly. Thank you for bringing this to our attention!
Kiara Galicinao, AIA, NCARB
Product Coordinator
Black Spectacles
Hey there! For question number 10 regarding stair count / width for the additional 2 stories - why would the egress factor be 0.2 and not 0.3?
[ screenshot removed ]
@aljacobs1 great question! Note that while 2021 IBC Section 1005.3.1 indicates that stairways be calculated using a means of egress factor of 0.3 inch, Exception 1 allows a 0.2 factor to be used when buildings other than Group H and I-2 occupancies have an automatic sprinkler system and emergency voice/alarm communication system in accordance with specified sections.
This is an example of one of those tricky nuances that you’ll encounter on the ARE, so be sure that you are reading the question and the entire code section/exceptions thoroughly. I just added this additional explanation to the answer feedback, so hopefully that clarifies things for other studiers going forward 
Also just a heads up - we do not allow copyrighted material to be shared on the community, so I will be removing the screenshot from your post.
Kiara Galicinao, AIA, NCARB
Product Coordinator
Black Spectacles
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