#1 – FIRE WALL

question

Do we have to assume the building is R-3 Occupancy Type?

Yes, it is R-3. Read about Occupancy classifications in Chapter 3. It says R-3 includes “buildings that do not contain more than two dwelling units.” We know we only have two dwelling units from the scenario description.I think reading the occupancy classifications is easier if you know what you're looking for. R-1 is hotels and motels, pretty specific. R-2 and R-3 can get confusing but R-3 sets size limits. So a 4-unit apartment is R-2 but a 1 or 2 unit building could be R-3. And R-4 is just crazy stuff like assisted living and detox centers..

question

What is requiring the use of a Fire Wall instead of a Fire Partition? Section 420 says walls separating dwelling units can be Fire Partitions.

The use of Fire Partitions is for dwelling units within the same building. The wall in this question is a party wall along a property line that separates two distinct buildings. This has to be a Fire Wall. The plans indicate a difference between Building A and Building B. The case study scenario also describes the overall project as two separate buildings on adjacent lots separated by a party wall on the property line.

#2 – FIRE WALL

#3 – COST ESTIMATE

QUESTION 7

QUESTION 8

QUESTION 9

QUESTION 10

QUESTION 11

question

I don't think there's enough information to determine which detail to use.

Oops. I meant to say refer to the same beam from Question 7. I have updated this question to specify which beam to consider and that the detail should be keyed in midspan.

QUESTION 12

question

My first thought was to look at the Exit Access Travel Distance Table 107.2 which would put the max distance at 250 ft with sprinklers. Why is this answer int he Common Path of Travel Table?

I used Table 1006.2.1 because this sets the egress distance where there is only one means of egress. I believe you need two in order to use the full Travel Distance Table 1017.2.

QUESTION 13

QUESTION 14

QUESTION 15

QUESTION 16

QUESTION 17

QUESTION 18

QUESTION 19

QUESTION 20

Why is the TJI a distributed load? Shouldn't the answer be D, a point load in the middle?

The TJI are evenly spaced at 16″ o.c. Sure each one is a mini point load, but the net effect is that they act as a distributed load. The thick line represents the direction the joists run. Look for the arrows and text note that indicates the uniform spacing.