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# Area Increase Due to Frontage (506.2) PowerPoint PPT Presentation

Area Increase Due to Frontage (506.2). Applicable to buildings with more than 25% of perimeter fronting on a public way or open space with minimum 20’ in width. I f = [F/P – 0.25]W/30 I f = Area increase due to frontage.

Area Increase Due to Frontage (506.2)

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### Area Increase Due to Frontage (506.2)

• Applicable to buildings with more than 25% of perimeter fronting on a public way or open space with minimum 20’ in width.

If = [F/P – 0.25]W/30

• I f= Area increase due to frontage.

• F = Building perimeter that fronts on a public way or open space having 20 feet (6096 mm) open minimum width (feet).

• P = Perimeter of entire building (feet).

• W = Width of public way or open space (feet) in accordance with Section 506.2.1.

Area Increase Due to Frontage

Approved Fire Line

N

If= [F/P – 0.25]W/30

Open space shall be either on the same lot or dedicated for public use and shall be accessed from a street or approved fire line (506.2.2)

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Area Increase Due to Frontage (Building does not comply with 506.2.1 Exception)

20x(20+30)/2+80x30+30x20+60x30+20x30+20x(20+30)/2+5x(20+30)/2+10x30+50x30

W=

20+80+30+60+20+20+5+10+50

8325

= 28.22’

W=

295

N

F = 295’

P = 340’

If = [F/P – 0.25]W/30 =

= [295/340 – 0.25] 28.22/30

If= 0.58

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Area Increase Due to Frontage (Building complies with 506.2.1 Exception)

80x(20+60)/2+20x60+30x20+40x60+20x(60+50)/2+20x60+20x(30+20)/2+5x(20+30)/2+10x60+50x60

W=

80+20+30+60+20+20+5+10+50

13925

= 47.20’

W=

295

N

F = 295’

P = 340’

If = [F/P – 0.25]W/30 =

= [295/340 – 0.25] 47.20/30

If= 0.97

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Using Cha-Cha Calculator

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