What is allowable area factor?

What is allowable area factor?

Allowable area for single-occupancy buildings, per floor, Aa = At + NS × If, where: NS is the tabular area factor for a nonsprinklered building (even if the building actually is sprinklered) and. If is the area factor due to frontage as defined below.

How do you calculate area frontage increase?

Equation 5-1: The area factor increase based on frontage (open perimeter) is determined in accordance with the following Equation 5-5: If = [F/P – 0.25]W/30. F = Building perimeter that fronts on a public way or open space having minimum distance of 20 feet (6096 mm).

How much does a non sprinklered Type IIIB building’s maximum height increase when it is equipped with an automatic sprinkler system?

Section 504.2 allows a building of R-1 occupancy and Type IIIB construction to be 5 stories in height when equipped throughout with an approved automatic sprinkler system in accordance with Section 903.3. 1.1.

Is allowable area in IBC per floor?

The answer was – 28,500 sq ft per IBC table 506.2 (using A-3 occupancy as the most restrictive among the given). 3, which says “No individual story shall exceed the allowable area (Aa) as determined by Equation 5-2…” (However, that refers to single-occupancy, multistory buildings.

How do you calculate maximum building height?

Building height shall be measured as the vertical distance from the average final grade to the highest point of the coping of a flat roof, or the deck line of a mansard roof, or to the average height of the highest gable of a pitch or hip roof.

What is frontage in building code?

Zoning Code Section 12.03 defines a frontage as “all property fronting on one side of the street between intersecting or intercepting streets, or between a street and right-of-way, waterway, end of dead end street,or city boundary measured along the street line.

What is the maximum allowable height permitted for a noncombustible communications tower located on the roof of a type IIB office building?

The structures shall be unlimited in height where of noncombustible materials and shall not extend more than 20 feet (6096 mm) above the allowable building height where of combustible materials (see Chapter 15 for additional requirements). For SI: 1 foot = 304.8 mm.

What is an unlimited area building?

Depending on the story height and the occupancy classification, the code presents different circumstances that allow an unlimited area building. One common thread among the requirements of unlimited area building is to have the building surrounded by increased open space, usually 60 feet in width.

What is unlimited area building?

What are the types of construction?

The four major types of construction include residential building, institutional and commercial building, specialized industrial construction, infrastructure and heavy construction.

What is construction type VB?

Type V — Wood Construction A Type V-B construction, the most basic, does not require a fire resistance rating for any of the building elements. The building elements are the primary structural frame, bearing walls, non-bearing walls, floor construction, and roof construction.

When is an unlimited area increase permitted on a building?

area increase is permitted for those buildings that comply with all of the requirements for unlimited-area buildings as described in Section 507, other than compliance with the 60-foot (18,288-mm) open space or public way requirement.

How do you calculate the allowable building area of a building?

When a building contains multiple use groups, the most stringent value applies. The tabular building area is permitted to be increased due to frontage and automatic sprinkler protection in accordance with Equation 1. A_a = [A_t+ (A_t × I_f )+ (A_t × I_s )] Equation 1: Allowable Building Area

What is the maximum frontage increase for a tabular building?

In this scenario, the maximum frontage increase is calculated to be 75 percent (I_f = 0.75) of the tabular building area. Where a building is equipped with an automatic sprinkler system, the tabular building area is increased 200 percent (I_s = 2).

What is the allowable area of a single occupancy building?

The allowable area of a single-occupancy building with no more than one story above grade plane shall be determined in accordance with Equation 5-1: Aa = Allowable area (square feet).