| 328B CONSTRUCTION, HEIGHT AND ALLOWABLE AREA | |
| Code | Plain English |
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328B.1 General. Group F-7 Occupancy JLWQ shall conform to code requirements for F-1 Occupancies as to construction, height and allowable area pursuant to Chapter 3, Chapter 5, Chapter 6, and to related code requirements and to the specific requirements herein. |
328B.1 General. |
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EXCEPTION 1. Where one-hour fire-resistive construction is required, floors in existing buildings constructed with valid permits may be accepted which have the separation limited to the installation of materials approved for the underside of a one-hour fire-resistive floor/ceiling assembly when the existing flooring system is air-tight and equivalent to a minimum nominal 3/4" thick wood floor. |
EXCEPTION 1. Normally, one-hour construction is required between live/work units and between units and corridors. This exception relaxes the rated "floor-ceiling assembly" requirement such that existing construction will often suffice. |
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EXCEPTION 2. Where one-hour fire-resistive construction is required, walls or ceiling surfaces in existing buildings constructed with valid permits, with wood lath and plaster in good condition or one-half inch thick gypsum wall board may be accepted when approved by the Building Official. |
EXCEPTION 2. Likewise, existing walls and ceilings will often be permissible under this exception even though they do not strictly meet rated wall assembly standards. Note: While this exception can be helpful, it does not remove the requirement that wall assemblies between units achieve an STC 50 sound attenuation rating. |
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EXCEPTION 3. In an existing building, an approved automatic sprinkler system, as specified in Chapter 38, may be substituted for one-hour fire-resistive construction, provided such system is not otherwise required throughout the building, including a requirement for sprinklers due to inadequate pressure and flow in the fire hydrants or fire supply that would provide protection to the building. |
EXCEPTION 3. This is a standard provision in the code allowing a sprinklered building to be considered equivalent to a one-hour rated building if the sprinklers are not otherwise required. Reasons why sprinklers "might otherwise be required" include the facts that: a) the building contains more than 15 units or b) the building is 3 stories or higher. |
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328B.1.1 Unlimited Area. Section 505.2 is not applicable to commercially/ industrially-oriented JLWQ except Section 505.2 may be applied if a request in approved form and content for alternate materials, alternate design and methods of construction is submitted to and approved by the Building Official. |
328B.1.1 Unlimited Area.
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328B.3 Special Provision. Walls and floors separating individual Group F-7 JLWQ from other F-7 Occupancy spaces shall be not less than one-hour fire-resistive construction. Storage or laundry rooms that are used in common by tenants of individual F-7 Occupancy JLWQ shall be separated from the rest of the building by not less than one-hour fire-resistive occupancy separation. |
328B.3 Special Provision. |
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328B.4 Exceptions to Table No. 6-A. Exceptions to Table No. 6-A relating to fire-resistive requirements for types of construction applies to individual spaces of Group F, Division 7 Occupancy pursuant to Section 601.5 including provisions for hotels and apartments pursuant to Section 601.5.2.2. |
328B.4 Exceptions to Table No. 6-A. This means in general that interior and non-load bearing partitions inside of units may be constructed of a lesser rating construction than the building in general. |