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International Residential Code Table R301.2(1) is hereby amended to read as follows:

IRC TABLE R301.2(1)

CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA

Ground Snow Loado(> 700 feet above sea level shall be per ASCE 7-16 Chap. 7)

WIND DESIGNl, m

Seismic Design Categoryf

SUBJECT TO DAMAGE FROM

Winter Design Tempe

Ice Barrier Underlayment Requiredh

Flood Hazardsg

Air Freezing Indexi

Mean Annual Tempj

Speedd (mph)

Topographic effectsk

Weatheringa

Frost line depthb

Termitec

25 (roof snow load shall also be 25 psf unless proven otherwise by the licensed structural engineer-of-record.)

110

NO

D2

MODERATE

12 inches

Slight to Moderate

22

NO

March 12, 1974 entry into National Flood Insurance Program. Current maps entitled “The Flood Insurance Study (FIS) for King County, Washington, and Incorporated Areas,” dated August 19, 2020, and any revisions thereto, as amended or revised with the accompanying Flood Insurance Rate Maps (FIRMs) dated August 19, 2020, and any revisions thereto.

170

51

MANUAL J DESIGN CRITERIAn

Elevation

Latitude

Winter heating

Summer cooling

Altitude correction factor

Indoor design temperature

Design temperature cooling

Heating temperature difference

Elevation shall be specific to the site.

Latitude shall be specific to the site.

See footnote n for all other values indicated in this table.

--

--

--

--

--

Cooling temperature difference

Wind velocity heating

Wind velocity cooling

Coincident wet bulb

Daily range

Winter humidity

Summer humidity

--

--

--

--

--

--

--

--

For SI: 1 pound per square foot = 0.0479 kPa, 1 mile per hour = 0.447 m/s.

a. Weathering may require a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code. The weathering column shall be filled in with the weathering index (i.e., “negligible,” “moderate” or “severe”) for concrete as determined from the Weathering Probability Map [Figure R301.2(3)]. The grade of masonry units shall be determined from ASTM C 34, C 55, C 62, C 73, C 90, C 129, C 145, C 216 or C 652.

b. The frost line depth may require deeper footings than indicated in Figure R403.1(1). 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 been 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(4)A]. Wind exposure category shall be determined on a site-specific basis in accordance with Section R301.2.1.4.

e. The applicable code to regulate the use and conservation of energy is the Washington State Energy Code – Residential (WSEC-R).

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 Insurance 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 all currently effective FIRMs and FBFMs or other flood hazard map adopted by the authority having jurisdiction, as amended.

h. In accordance with Sections R905.2.7.1, 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, the 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° Fahrenheit)” at www.ncdc.noaa.gov/fpsf.html.

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)” at www.ncdc.noaa.gov/fpsf.html.

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(4) 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. The City of Bellevue has “NO” requirements for unusual wind conditions.

m. In accordance with Section R301.2.1.2.1, the jurisdiction shall indicate the wind-borne debris wind zone(s). Otherwise, the jurisdiction shall indicate “NO” in this part of the table. The City of Bellevue has “NO” requirements for wind-borne debris wind zones.

n. The applicable code to regulate the use and conservation of energy is the Washington State Energy Code – Residential (WSEC-R).

o. The jurisdiction shall fill in this section of the table using the Ground Snow Loads in Figure R301.2(6) or established criteria determined by the jurisdiction.

(Ord. 6531 § 6, 2020.)