Attachment A - Chapter 14 Redline

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Cooling temperature difference Wind velocity heating Wind velocity cooling Coincident wet bulb Daily range Winter humidity Summer humidity 16 - - 64 High - - 11 All snow loads are site specific and shall be determined by the Building Official. 22 The seismic design category between C, D0 and D1 will be determined on a site-specific basis. For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s. a. Where weathering requires a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code, the frost line depth strength required for weathering shall govern. The weathering column shall be filled in with the w eathering index, “negligible,” “moderate” or “severe” for concrete as determined from Figure R301.2 (4). The grade of masonry units shall be determined from ASTM C34, C55, C62, C73, C90, C129, C145, C216 or C652. b. Where the frost line depth requires deeper footings than indicated in Figure R403.1(1), the frost line depth strength require d for weathering shall govern. The jurisdiction shall fill in the frost line depth column with the minimum depth of footing below finish grade . c. The jurisdiction shall fill in this part of the table to indicate the need for protection depending on whether there has bee n a history of local subterranean termite damage. d. The jurisdiction shall fill in this part of the table with the wind speed from the basic wind speed map [Figure R301.2(5)A]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4. e. The outdoor design dry-bulb temperature shall be selected from the columns of 971/2 -percent values for winter from Appendix D of the International Plumbing Code. Deviations from the Appendix D temperatures shall be permitted to reflect local climates or local weather experience as determined by the building official. [Also see Figure R301.2(1).] f. The jurisdiction shall fill in this part of the table with the seismic design category determined from Section R301.2.2.1. g. The jurisdiction shall fill in this part of the table with (a) the date of the jurisdiction’s entry into the National Flood Insur ance Program (date of adoption of the first code or ordinance for management of flood hazard areas), (b) the date(s) of the Flood Insurance Study and (c) the panel numbers and dates of the currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended. h. In accordance with Sections R905.1.2, R905.4.3.1, R905.5.3.1, R905.6.3.1, R905.7.3.1 and R905.8.3.1, where there has been a history of local damage from the effects of ice damming, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, th e jurisdiction shall fill in this part of the table with “NO.” i. The jurisdiction shall fill in this part of the table with the 100-year return period air freezing index (BF -days) from Figure R403.3(2) or from the 100-year (99 percent) value on the National Climatic Data Center data table “Air Freezing Index -USA Method (Base 32°F).” j. The jurisdiction shall fill in this part of the table with the mean annual temperature from the National Climatic Data Center data table “Air Freezing Index-USA Method (Base 32°F).” k. In accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to topographic wind speed-up effects, the jurisdiction shall fill in this part of the table with “YES.” Otherwise, the jurisdiction shall indicate “NO” in this part of the table. l. In accordance with Figure R301.2(5)A, where there is local historical data documenting unusual wind conditions, the jurisdiction shall fill in this part of the table with “YES” and identify any specific requirements. Otherwise, the jurisdiction shall indicate “NO” in this part of the table. m. In accordance with Section R301.2.1.2 the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate “NO” in this part of the table. n. The jurisdiction shall fill in these sections of the table to establish the design criteria using Table 1a or 1b from ACCA Manual J or established criteria determined by the jurisdiction. o. The jurisdiction shall fill in this section of the table using the Ground Snow Loads in Figure R301.2(6). 3. Professional Preparation of Plans: Kittitas County shall require a Washington State licensed design professional, licensed under the provisions of RCW 18.08, WAC 308-12 (for Architects) or RCW 18.43 (for Engineers) to stamp, prepare or oversee the preparation of plans and calculations for buildings or structures when ANY of the following criteria are met but is not limited to the following: a. A building of any occupancy over 4,000 square feet. Exception: residential buildings that do not contain more than 4 dwelling units; farm buildings of any size associated with commercial agriculture; buildings such as garages, sheds, barn or shelters for animals and machinery that are used in connection with or auxiliary to farm buildings, or in connection with or accessory to residential buildings of four dwelling units or less. b. Buildings containing five or more residential dwelling units. Exception: buildings less than 4000 square feet. c. All log and timber frame structures and log and timber frame structural components. This includes any log or beam style trusses used in stick framed buildings. d. All structures located above 70-psf ground snow load that are regulated by the International Residential Code.