Design Criteria

CLIMATIC AND GEOGRAPHIC DESIGN CRITERIA


GROUND
SNOW
LOAD
(k)
WIND
SPEED
(mph)
(d)
SEISMIC
DESIGN
CATEGORY
(f)
WEATHERING
(a)
FROST
DEPTH
LINE

(b)

TERMITE
(c)
k
115
D1, D2
Severe
34"
Slight


WINTER
DESIGN
TEMP
(e)

ICE SHIELD
UNDER-LAYMENT
REQUIRED
(i)
FLOOD
HAZARDS
(g)
AIR
FREEZING
INDEX
(h)
MEAN
ANNUAL
TEMP
(j)
-30
YES
g
YES
38

For Sl: 1 pound per square foot==0.0479 kN/m2 I mile per hour=t.609km/h.

a. Probability Map (Figure RJ0l.2 (3)1- Concrete shall conform to the "severe" requirements of Table R402.2. The grade of masonry units shall be determined from ASTM C34, C55, C62, C73, C90, Cl 29, C145, C216 or C652.

b. The frost line depth for Teton County is 34-inches measured from finished grade to the bottom of footings or as determined by a soils investigation.

c. Teton County shall be considered "none to slight" in accordance with figure RJ0I.2(6).

d. The basic wind speed shall bell as determined from the wind speed map !Figure R301.2(4)J. 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 -30.

f. The minimum Seismic Design Category for Teton County as determined from Section R30J.2.2.I is D.

g. The date of Teton County's entry into the National Flood Insurance Program is May 4,1989, September 29, 2012 is the currently effective FIRM and FBFM, or other flood hazard map adopted by the community, as maybe amended.

h. The Mean Annual Temperature is 38.0 and the Air Freezing Index Return Periods & Associated Probabilities I 00 Year (99%) is 253l. Prepared by NOAA - National Climatic Data Center.

i. The Mean Annual Temperature Is 38.0 and the Air Freezing Index Return Periods & Associated Probabilities 100 Year (99%) is 2531. www.ncdc.noa11.gov/fpsf.html.

j. Source - www.ncdc.noaa.gov/fpsf.html.

k. As shown on the GIS map for Teton County. To view go to www.tetoncountywy.gov click on the following; Maps– GIS map server- Ownership - Layers Tool - Planning and Building Background Layers – Ground Snow Load - blue is 175 and tan is 120 and green is 75 Search a specific address or pidn for the correct snow load for that property.

INSULATION AND FENESTRATION REQUIREMENTS

CLIMATE
ZONE
FENESTRATION
U-FACTOR
SKYLIGHT

GLAZED
FENESTRATION
SHGC
CEILING
R-VALUE
WOOD
FRAME
WALL
R-VALUE


7 and 8
0.32
0.55
NR
49
20+5 
or
13+10


MASS WALL
R-VALUE
FLOOR
R-VALUE
BASEMENT
WALL
R-VALUE
SLAB
R-VALUE &
DEPTH

CRAWL SPACE
WALL
R-VALUE
19/21
38
15/19
10.4 ft
5/19

a. R-values are minimums. U-factors and SHGC are maximums. . When insulation is installed in a cavity which is less than the label or design thickness of the insulation, the installed R-value of the insulation shall not be less than the R-value specified in the table

b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestrations. Exception: Skylights may be excluded from glazed fenestrations SHGC requirements in Climate Zones 1 through 3 where the SHGC for such skylights does not exceed 0.30

c. 15/19 means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation at the interior of the basement wall. 15/19 shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the home. 10/13 means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation of the interior of the basement wall

d. R-5 shall be added to the required slab edge R-values for heated slabs. Insulation depth shall be the depth of the footing or 2 feet, whichever is less in Zone 1 through 3 for heated slabs.

e. There are no SHGC requirements in the Marine Zone

f. Basement wall insulation is not required in warm-humid locations. (Teton county is not in this zone)

g. Or insulation sufficient to fill the framing cavity.

h. The first value is cavity insulation, the second value is continuous insulation, so “13+5” means R13 cavity insulation plus R5 continuous insulation

i. The second R-value applies when more than half the insulation is on the interior of the mass wall.