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

Climatic and Geographic Design Criteria IRC Table R301.2(1)

ROOF SNOW LOAD a (psf)	WIND DESIGN				SEISMIC DESIGN CATEGORY	SUBJECT TO DAMAGE FROM			OUTDOOR DESIGN TEMP (F) – Heat/Cool	ICE BARRIER UNDERLAYMENT REQUIRED	FLOOD HAZARD	AIR FREEZING INDEX	MEAN ANNUAL TEMP
	Speed b (mph)	Topographic effectsb	Special wind region	Windborne debris zone		Weatheringc	Frost line depth	Termite
25	110	Yes	No	No	D2	Moderate	12”	Slight to Moderate	83/24	No	See BMC	113	53
MANUAL J DESIGN CRITERIA
Elevation			Latitude	Winter heating	Summer cooling	Altitude correction factor		Indoor design temperature		Design temperature cooling		Heating temperature difference
338 feet			47o34’39’’	72oF max	75oF min	0.99		72oF		75oF		48oF
Cooling temperature difference			Wind velocity heating	Wind velocity cooling	Coincident wet bulb	Daily range		Winter humidity		Summer humidity
8oF			N.A.	N.A.	66	Medium		75%		68%

^a This is the minimum roof snow load. When using this snow load it will be left to the engineer’s judgment whether to consider drift or sliding snow. However, rain on snow surcharge of 5 psf must be considered for roof slopes less than 5 degrees.

^b Wind exposure category and Topographic effects (Wind Speed-up Kzt factor) shall be determined on a site-specific basis by the Engineer of Record (components and cladding need not consider topographic effects unless otherwise determined by the engineer of record).

^c Weathering may require a higher strength concrete or grade of masonry than necessary to satisfy the structural requirements of this code. 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.