172. Where a Group B or M fire are a exceeds 24,000 square feet (2,230 mZ)
on all floors; and
3. The area of mezzanine must be included in determining the areas where
sprinklers are required.
CBC § 903.2.10.3 is amended to read as follows:
§ 903.2.10.3 Building four (4) stories or more in height. An automatic sprinkler
system must be installed throughout all buildings having usable floor area four stories or
more above grade, or buildings attached thereto.
CBC § 910.1 is amended to read as follows:
§ 910.1 General. Where required by this code or otherwise installed
smoke and heat vents or mechanical smoke exhaust systems and draft
curtains must conform to the requirements of this section.
EXCEPTIONS:
1. Frozen food warehouses used solely for storage of Class I and II
commodities where protected by an approved automatic sprinkler system.
2. Where areas of buildings are equipped with early suppression fast -
response (ESFR) sprinklers, smoke and heat venting must be provided by
mechanical smoke exhaust systems in accordance with Section 910.4
within these areas.
§ CBC 2306.4 is amended to remove CBC §2306.4.3, 2306.4.4 and 2306.4.5 but
adding the following language:
"No shear walls using particle board, fiberboard, gypsum wall board or stucco shall be
permitted.
Hold -down connectors must be designed to resist shear wall overturning moments
using approved cyclic load values or 75 percent of the allowable earthquake load values
that do not consider cyclic loading of the product. Hold -downs must be re- tightened just
before covering the wall framing.
Interior braced wall support. Interior braced wall lines must be supported on
continuous foundations.
CBC Tables 2306.4.3, 2306.4.4 and 2306.4.5 are deleted.
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