Frontage

[Sifu]

Trying to follow a frontage calculation and not having too much success. Given a large building, with two separate enclosed open air courtyards. The courtyards are bounded on all four sides by exterior walls of the building that surrounds them. Does the perimeter of the walls that enclose the courtyard count towards the total perimeter?

 

[RLGA]

No, the walls of the court are not included, unless the building is divided by a fire wall.

When considered a single building (Condition A in the illustration below), the walls of the court...

1. do not face an interior lot line;
2. do not face a street, alley, or public way; and
3. do not face the exterior face of an adjacent building on the same property.

With a fire wall added, one building faces another building, and if the second option of Section 706.5.1 is used, then the walls of the court also face an interior lot line, although imaginary (Condition B in the illustration below). Thus, the court walls are included in determining the building perimeter for each building, plus the length of the fire wall.

 

[Sifu]

Well, I will need to deeply analyze 706.5.1 #2 because that is the scenario....for one of the courtyards. But for now the question is would I have two different frontage calculations, one for each separate building?

 

[RLGA]

Well, I will need to deeply analyze 706.5.1 #2 because that is the scenario....for one of the courtyards. But for now the question is would I have two different frontage calculations, one for each separate building?

Yes, because they are two separate buildings for the purpose of determining allowable areas per Section 503.1.

 

[Tim Mailloux]

Well, I will need to deeply analyze 706.5.1 #2 because that is the scenario....for one of the courtyards. But for now the question is would I have two different frontage calculations, one for each separate building?

two separate frontage calculations will be required.

 

[Sifu]

I have a 3-hr fire wall intersecting the exterior wall which is 2-hr rated. I would say they meet 706.5.1 option #1. So I don't have the imaginary interior lot line. I would think then that I have two frontage calculations but do not include the perimeter of the courtyards since they are not facing an interior lot line (real or imaginary).

 

[RLGA]

I have a 3-hr fire wall intersecting the exterior wall which is 2-hr rated. I would say they meet 706.5.1 option #1. So I don't have the imaginary interior lot line. I would think then that I have two frontage calculations but do not include the perimeter of the courtyards since they are not facing an interior lot line (real or imaginary).

You still include the court walls in each building perimeter because the two buildings face each other on the same lot per #3 of Section 506.3.2.