3:28:14 PM.
Address: /showpage.php~file=06050500.htm.html
Title: Section 505  •  Size: 6883

Go to Table of Contents
Go to previous section: 504
Go to next section: 506


SECTION 505 - ALLOWABLE AREA INCREASES

505.1 General. The floor areas specified in Section 504 may be increased by employing one of the provisions of this section.

505.1.1 Separation on two sides. Where public ways or yards more than 20 feet (6096 mm) in width extend along and adjoin two sides of the building, floor areas may be increased at a rate of 11/4 percent for each foot (305 mm) by which the minimum width exceeds 20 feet (6096 mm), but the increase shall not exceed 50 percent.

505.1.2 Separation on three sides. Where public ways or yards more than 20 feet (6096 mm) in width extend along and adjoin three sides of the building, floor areas may be increased at a rate of 21/2 percent for each foot (305 mm) by which the minimum width exceeds 20 feet (6096 mm), but the increase shall not exceed 100 percent.

505.1.3 Separation on all sides. Where public ways or yards more than 20 feet (6096 mm) in width extend on all sides of a building and adjoin the entire perimeter, floor areas may be increased at a rate of 5 percent for each foot (305 mm) by which the minimum exceeds 20 feet (6096 mm). Such increases shall not exceed 100 percent, except that greater increases shall be permitted for the following occupancies:

1. Group S, Division 1 aircraft storage hangars not exceeding one story in height.

2. Group S, Division 2 or Group F, Division 2 Occupancies not exceeding two stories in height.

3. Group H, Division 5 aircraft repair hangars not exceeding one story in height. Area increases shall not exceed 500 percent for aircraft repair hangars except as provided in Section 505.2.

505.2 Unlimited Area. The area of any one- or two-story building of Groups B; F, Division 1 or 2; M; S, Division 1, 2, 3, 4 or 5; and H, Division 5 Occupancies shall not be limited if the building is provided with an approved automatic sprinkler system throughout as specified in Chapter 9, and entirely surrounded and adjoined by public ways or yards not less than 60 feet (18 288 mm) in width.

The area of a Group S, Division 2 or Group F, Division 2 Occupancy in a one-story Type II, Type III One-hour or Type IV building shall not be limited if the building is entirely surrounded and adjoined by public ways or yards not less than 60 feet (18 288 mm) in width.

505.3 Automatic Sprinkler Systems. The areas specified in Table 5-B and Section 504.2 may be tripled in one-story buildings and doubled in buildings of more than one story if the building is provided with an approved automatic sprinkler system throughout. The area increases permitted in this subsection may be compounded with that specified in Section 505.1.1, 505.1.2 or 505.1.3. The increases permitted in this subsection shall not apply when automatic sprinkler systems are installed under the following provisions:

1. Section 506 for an increase in allowable number of stories.

2. Section 904.2.5.1 for Group H, Divisions 1 and 2 Occupancies.

3. Substitution for one-hour fire-resistive construction pursuant to Section 508.

4. Section 402, Atria.

Go to Table of Contents
Go to previous section: 504
Go to next section: 506


Commercial Asbuilts: BOMA Asbuilt | Definitions | Projects | Project Types | FAQ | Useful links
Residential Asbuilts: Projects | Asbuilt Services | FAQ
Contact | Copyright | Privacy Policy | Site Map | News