2003 ibc allowable floor area check from forum engineer web site

7/29/2019 2003 IBC Allowable Floor Area Check From Forum Engineer Web Site

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SECTION 507 UNLIMITED AREA BUILDINGS

Go to the next TAB and calculate floor area.YES #

NO #

YES #

NO #

YES #

NO #

The above-mentioned 60' frontage may be reduced to not less than 40', provided:

1. The reduced frontage is not more than 75% of the building perimeter.

2. Exterior walls facing the reduced frontage have a min. fire-resistance rating of 3 hr.

3. Openings in the above-mentioned walls are protected to 3-hr rating.

YES #

NO #

1. Used as a church, community hall, dance hall, exhibition hall, gymnasium,

lecture hall, indoor swimming pool or tennis court.

2. The building has no stage other than a platform.

3. The assembly floor is located within 21" of street or grade level and all exits are

provided with ramps complying with Section 1010.1 to the street or grade level.

Group H-2, H-3, and H-4 fire areas are permitted in unlimited area buildings having

occupancies in Groups F and S, provided:

1. Fire areas around building perimeter not exceed 10% of the building area nor

the area determined by Table 503 plus the frontage increase in Section 506.2

One-story, sprinklered throughout, Group A-3 building of Type I or II construction

surrounded and adjoined by 60' public ways or yards, provided:

Section 507.4

Section 507.5

Section 507.6

One-story Group F-2 or S-2 building surrounded and adjoined by 60' public ways or

yardsSection 507.1

One- or two-story, sprinklered throughout, Group B, F, M, or S building surrounded and

adjoined by 60' public ways or yardsSections 507.2 & 507.3

One-story, sprinklered throughout, Group A-4 building of other than Type V construction

surrounded and adjoined by 60' public ways or yards Section 507.2


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Project:Developed by Mark Chang

Separated Uses? YES -- Section 302.3.1 vs Section 302.3.2 Version 2.0

Number of Stories: 2 Number of Frontage Cases: 3 Number of Occupancy Groups: 3

FALSE -- Qualify UL area per Section 507.1, 507.2, 507.3, 507.5, 507.8, or 507.9 except the 60' frontage requirement.

NO -- The building in consideration is a 4-story, R-occupancy, and sprkinklered per NFPA 13R throughout.

F (in feet) = Length of the exterior walls facing the associated frontage

P (in feet) = Perimeter of the building = Length of the total exterior walls

Fron tage Case 1: Fron tage Case 2: Frontage Case 3:

Width of Frontage (in feet) = 30 Width of Frontage (in feet) = 20 Width of Frontage (in feet) = 28

F = 405 F = 710 F = 650

P = 810 P = 810 P = 810

F / P = 0.500 F / P = 0.877 F / P = 0.802

If = 100 (F/P-0.25) (W/30) = 25.0 If = 100 (F/P-0.25) (W/30) = 41.8 If = 100 (F/P-0.25) (W/30) = 51.6

Floor Number: 1

Occupancy Group 1: B Occupancy Group 2: F-1 Occupancy Group 3: S-2

Type of Construction: Type V-B Type of Construction: Type V-B Type of Construction: Type V-B

Sprinkler Throughout? NO Sprinkler Throughout? NO Sprinkler Throughout? NO

Sprinkler for Fire-Rating Sub? NO Sprinkler for Fire-Rating Sub? NO Sprinkler for Fire-Rating Sub? NO

Actual Floor Area (A1): 6,000 Actual Floor Area (A2): 4,800 Actual Floor Area (A3): 3,600Tabular Area per Floor (At): 9,000 Tabular Area per Floor (At): 8,500 Tabular Area per Floor (At): 13,500

Frontage Increase (At If / 100): 4,641 ### Frontage Increase (At If / 100): 4,383 Frontage Increase (At If / 100): 6,961 ##

Sprinkler Increase (At Is / 100): 0 Sprinkler Increase (At Is / 100): 0 Sprinkler Increase (At Is / 100): 0 1.

Allowable Area per Floor (Aa1): 13,641 0.4 Allowable Area per Floor (Aa2): 12,883 Allowable Area per Floor (Aa3): 20,461 0.

Tabular All. Number of Stories: 2 Tabular All. Number of Stories: 1 Tabular All. Number of Stories: 2

2 14569

A1/Aa1 + A2/Aa2 + A3/Aa3 = 0.99 (OK) Maximum Area (sq.ft.) of The Building = 29,138

1

On The Dou ble, Inc .

0

1

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302.3.1 Nonseparated uses. Each portion of the building

shall be individually classified as to use. The required type

of construction for the building shall be determined by applying

the height and area limitations for each of the applicable

occupancies to the entire building. The mostrestrictive type of construction, so determined, shall apply

to the entire building. All other code requirements shall apply

to each portion of the building based on the use of that

space except that the most restrictive applicable provisions

of Section 403 and Chapter 9 shall apply to these SECTION 403 HIGH-RISE BUILDINGS

nonseparated uses. Fire separations are not required between CHAPTER 9 FIRE PROTECTION SYSTEMS

uses, except as required by other provisions.

302.3.2 Separated uses. Each portion of the building shall

be individually classified as to use and shall be completely

separated from adjacent areas by fire barrier walls or horizontal

assemblies or both having a fire-resistance rating determined

in accordance with Table 302.3.2 for uses being

separated. Each fire area shall comply with this code based

on the use of that space. Each fire area shall comply with the

height limitations based on the use of that space and the type

of construction classification. In each story, the building

area shall be such that the sum of the ratios of the floor area

of each use divided by the allowable area for each use shallnot exceed one.

2003 ibc allowable floor area check from forum engineer web site

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