• Welcome to The Building Code Forum

    Your premier resource for building code knowledge.

    This forum remains free to the public thanks to the generous support of our Sawhorse Members and Corporate Sponsors. Their contributions help keep this community thriving and accessible.

    Want enhanced access to expert discussions and exclusive features? Learn more about the benefits here.

    Ready to upgrade? Log in and upgrade now.

Frontage issue

Sifu

Sifu

SAWHORSE
Joined
Sep 3, 2011
Messages
3,393
I received a question from a neighboring AHJ. I am having trouble even articulating this. They are running frontage calculation for each occupancy in a mixed occupancy building, instead of using the building as a whole. I have never heard of this, and can't process how they can even plug numbers into the formulas. This has me confused enough to question my own methods and sanity. So for a mixed use building with 3 different occupancy classifications they are running 3 frontage calculations and 3 different allowable area calculations. I use the entire building and do one frontage calculation. Am I crazy, or are they?
 
Sifu said:
I received a question from a neighboring AHJ. I am having trouble even articulating this. They are running frontage calculation for each occupancy in a mixed occupancy building, instead of using the building as a whole. I have never heard of this, and can't process how they can even plug numbers into the formulas. This has me confused enough to question my own methods and sanity. So for a mixed use building with 3 different occupancy classifications they are running 3 frontage calculations and 3 different allowable area calculations. I use the entire building and do one frontage calculation. Am I crazy, or are they?
Click to expand...
if seperated mixed use you need to do multiple calculations, if non-seperated mixed use you run one calculation based on the use group with the worst case.
 
They are wrong. The frontage increases are based on distances from property lines or public ROW's. One calculation for the entire building no matter how many different occupancies might be within the building. The different occupancies cannot exceed the sq ft limits of Table 506.2 based on construction type and sprinklers.
 
The frontage increase calculation is not tied to occupancy groups but to the building. Thus, when using the separated occupancies method, you determine one frontage increase factor based on the building's frontage and apply that factor to each occupancy group.
 
RLGA said:
The frontage increase calculation is not tied to occupancy groups but to the building. Thus, when using the separated occupancies method, you determine one frontage increase factor based on the building's frontage and apply that factor to each occupancy group.
Click to expand...
one frontage increase factor for the entire building, but with seperated mixed use there will be a separate allowable area calculation for each occupancy that include the frontage increase factor.
 
You must log in or register to reply here.
Back
Top