H.B. 383 Enrolled

1

INTERNATIONAL RESIDENTIAL CODE AMENDMENTS
2 2012 GENERAL SESSION
3 STATE OF UTAH
4 Chief Sponsor: Jeremy A. Peterson
5 Senate Sponsor: Curtis S. Bramble
6
7 LONG TITLE
8 General Description:
9 This bill modifies a provision of the adopted International Residential Code.
10 Highlighted Provisions:
11 This bill:
12 . adds a provision to the adopted International Residential Code stating that a
13 physical change to a structure with a nonconforming legal rental housing use for an
14 egress bedroom window is not necessary under certain circumstances.
15 Money Appropriated in this Bill:
16 None
17 Other Special Clauses:
18 None
19 Utah Code Sections Affected:
20 AMENDS:
21 15A-3-202, as enacted by Laws of Utah 2011, Chapter 14
22
23 Be it enacted by the Legislature of the state of Utah:
24 Section 1. Section 15A-3-202 is amended to read:
25 15A-3-202. Amendments to Chapters 1 through 5 of IRC.
26 (1) In IRC, Section R102, a new Section R102.7.2 is added as follows:
27 "R102.7.2 Physical change for bedroom window egress in legal nonconforming rental
28 housing use. A structure classified as a legal nonconforming rental housing use, whose egress
29 bedroom window is smaller than required by this code, is not required to undergo a physical

30 change to conform to this code if the change would compromise the structural integrity of the
31 building or could not be completed in accordance with other applicable requirements of this
32 code, including setback and window well requirements."
33 [(1)] (2) In IRC, Section 109:
34 (a) A new IRC, Section 109.1.5, is added as follows: "R109.1.5 Weather-resistant
35 exterior wall envelope inspections. An inspection shall be made of the weather-resistant
36 exterior wall envelope as required by Section R703.1 and flashings as required by Section
37 R703.8 to prevent water from entering the weather-resistive barrier."
38 (b) The remaining sections are renumbered as follows: R109.1.6 Other inspections;
39 R109.1.6.1 Fire- and smoke-resistance-rated construction inspection; R109.1.6.2 Reinforced
40 masonry, insulating concrete form (ICF) and conventionally formed concrete wall inspection;
41 and R109.1.7 Final inspection.
42 [(2)] (3) IRC, Section R114.1, is deleted and replaced with the following: "R114.1
43 Notice to owner. Upon notice from the building official that work on any building or structure
44 is being prosecuted contrary to the provisions of this code or other pertinent laws or ordinances
45 or in an unsafe and dangerous manner, such work shall be immediately stopped. The stop
46 work order shall be in writing and shall be given to the owner of the property involved, or to
47 the owner's agent or to the person doing the work; and shall state the conditions under which
48 work will be permitted to resume."
49 [(3)] (4) In IRC, Section R202, the following definition is added: "CERTIFIED
50 BACKFLOW PREVENTER ASSEMBLY TESTER: A person who has shown competence to
51 test Backflow prevention assemblies to the satisfaction of the authority having jurisdiction
52 under Utah Code, Subsection 19-4-104 (4)."
53 [(4)] (5) In IRC, Section R202, the definition of "Cross Connection" is deleted and
54 replaced with the following: "CROSS CONNECTION. Any physical connection or potential
55 connection or arrangement between two otherwise separate piping systems, one of which
56 contains potable water and the other either water of unknown or questionable safety or steam,
57 gas, or chemical, whereby there exists the possibility for flow from one system to the other,

58 with the direction of flow depending on the pressure differential between the two systems (see
59 "Backflow, Water Distribution")."
60 [(5)] (6) In IRC, Section R202, the definition of "Potable Water" is deleted and
61 replaced with the following: "POTABLE WATER. Water free from impurities present in
62 amounts sufficient to cause disease or harmful physiological effects and conforming to the
63 Utah Code, Title 19, Chapters 4, Safe Drinking Water Act, and 5, Water Quality Act, and the
64 regulations of the public health authority having jurisdiction."
65 [(6)] (7) IRC, Figure R301.2(5), is deleted and replaced with Table R301.2(5a) and
66 Table R301.2(5b) as follows:

67	"TABLE NO. R301.2(5a)
68	STATE OF UTAH - REGIONAL SNOW LOAD FACTORS
69		COUNTY	Po	S	Ao
70		Beaver	43	63	6.2
71		Box Elder	43	63	5.2
72		Cache	50	63	4.5
73		Carbon	43	63	5.2
74		Daggett	43	63	6.5
75		Davis	43	63	4.5
76		Duchesne	43	63	6.5
77		Emery	43	63	6.0
78		Garfield	43	63	6.0
79		Grand	36	63	6.5
80		Iron	43	63	5.8
81		Juab	43	63	5.2
82		Kane	36	63	5.7
83		Millard	43	63	5.3
84		Morgan	57	63	4.5
85		Piute	43	63	6.2
86		Rich	57	63	4.1
87		Salt Lake	43	63	4.5
88		San Juan	43	63	6.5
89		Sanpete	43	63	5.2
90		Sevier	43	63	6.0
91		Summit	86	63	5.0
92		Tooele	43	63	4.5
93		Uintah	43	63	7.0
94		Utah	43	63	4.5
95		Wasatch	86	63	5.0
96		Washington	29	63	6.0
97		Wayne	36	63	6.5
98		Weber	43	63	4.5

99	TABLE NO. R301.2(5b)
100	RECOMMENDED SNOW LOADS FOR SELECTED UTAH CITIES AND TOWNS(2)
101				Roof Snow Load (PSF)	Ground Snow Load (PSF)
102		Beaver County
103		Beaver	5,920 ft.	43	62
104		Box Elder County
105		Brigham City	4,300 ft.	30	43
106		Tremonton	4,290 ft.	30	43
107		Cache County
108		Logan	4,530 ft.	35	50
109		Smithfield	4,595 ft.	35	50
110		Carbon County
111		Price	5,550 ft.	30	43
112		Daggett County
113		Manila	5,377 ft.	30	43
114		Davis County
115		Bountiful	4,300 ft.	30	43
116		Farmington	4,270 ft.	30	43
117		Layton	4,400 ft.	30	43
118		Fruit Heights	4,500 ft.	40	57
119		Duchesne County
120		Duchesne	5,510 ft.	30	43
121		Roosevelt	5,104 ft.	30	43
122		Emery County
123		Castle Dale	5,660 ft.	30	43
124		Green River	4,070 ft.	25	36
125		Garfield County
126		Panguitch	6,600 ft.	30	43
127		Grand County
128		Moab	3,965 ft.	25	36
129		Iron County
130		Cedar City	5,831 ft.	30	43
131		Juab County
132		Nephi	5,130 ft.	30	43
133		Kane County
134		Kanab	5,000 ft.	25	36
135		Millard County
136		Fillmore	5,000 ft.	30	43
137		Delta	4,623 ft.	30	43
138		Morgan County
139		Morgan	5,064 ft.	40	57
140		Piute County
141		Piute	5,996 ft.	30	43
142		Rich County
143		Woodruff	6,315 ft.	40	57
144		Salt Lake County
145		Murray	4,325 ft.	30	43
146		Salt Lake City	4,300 ft.	30	43
147		Sandy	4,500 ft.	30	43
148		West Jordan	4,375 ft.	30	43
149		West Valley	4,250 ft.	30	43
150		San Juan County
151		Blanding	6,200 ft.	30	43
152		Monticello	6,820 ft.	35	50
153		Sanpete County
154		Fairview	6,750 ft.	35	50
155		Mt. Pleasant	5,900 ft.	30	43
156		Manti	5,740 ft.	30	43
157		Ephraim	5,540 ft.	30	43
158		Gunnison	5,145 ft.	30	43
159		Sevier County
160		Salina	5,130 ft.	30	43
161		Richfield	5,270 ft.	30	43
162		Summit County
163		Coalville	5,600 ft.	60	86
164		Kamas	6,500 ft.	70	100
165		Park City	6,800 ft.	100	142
166		Park City	8,400 ft.	162	231
167		Summit Park	7,200 ft.	90	128
168		Tooele County
169		Tooele	5,100 ft.	30	43
170		Uintah County
171		Vernal	5,280 ft.	30	43
172		Utah County
173		American Fork	4,500 ft.	30	43
174		Orem	4,650 ft.	30	43
175		Pleasant Grove	5,000 ft.	30	43
176		Provo	5,000 ft.	30	43
177		Spanish Fork	4,720 ft.	30	43
178		Wasatch County
179		Heber	5,630 ft.	60	86
180		Washington County
181		Central	5,209 ft.	25	36
182		Dameron	4,550 ft.	25	36
183		Leeds	3,460 ft.	20	29
184		Rockville	3,700 ft.	25	36
185		Santa Clara	2,850 ft.	15 (1)	21
186		St. George	2,750 ft.	15 (1)	21
187		Wayne County
188		Loa	7,080 ft.	30	43
189		Hanksville	4,308 ft.	25	36
190		Weber County
191		North Ogden	4,500 ft.	40	57
192		Ogden	4,350 ft.	30	43
193	NOTES
194	(1) The IRC requires a minimum live load - See R301.6.
195	(2) This table is informational only in that actual site elevations may vary. Table is only valid if site elevation is within 100 feet of the listed elevation."

196 [(7)] (8) IRC, Section R301.6, is deleted and replaced with the following: "R301.6
197 Utah Snow Loads. The ground snow load, Pg, to be used in the determination of design snow
198 loads for buildings and other structures shall be determined by using the following formula: Pg
199 = (Po2 + S2(A-Ao)2)0.5 for A greater than Ao, and Pg = Po for A less than or equal to Ao.
200 WHERE:
201 Pg = Ground snow load at a given elevation (psf);
202 Po = Base ground snow load (psf) from Table No. R301.2(5a);
203 S = Change in ground snow load with elevation (psf/100 ft.) From Table No. R301.2(5a);
204 A = Elevation above sea level at the site (ft./1,000);
205 Ao = Base ground snow elevation from Table R301.2(5a) (ft./1,000).
206 The building official may round the roof snow load to the nearest 5 psf. The ground snow
207 load, Pg, may be adjusted by the building official when a licensed engineer or architect submits
208 data substantiating the adjustments. A record of such action together with the substantiating
209 data shall be provided to the division for a permanent record.
210 The building official may also directly adopt roof snow loads in accordance with Table
211 R301.2(5b), provided the site is no more than 100 ft. higher than the listed elevation.

212 Where the minimum roof live load in accordance with Table R301.6 is greater than the design
213 roof snow load, such roof live load shall be used for design, however, it shall not be reduced to
214 a load lower than the design roof snow load. Drifting need not be considered for roof snow
215 loads less than 20 psf."
216 [(8)] (9) In IRC, Section R302.2, the words "Exception: A" are deleted and replaced
217 with the following: "Exceptions: 1. A common 2-hour fire-resistance-rated wall is permitted
218 for townhouses if such walls do not contain plumbing or mechanical equipment, ducts or vents
219 in the cavity of the common wall. Electrical installation shall be installed in accordance with
220 Chapters 34 through 43. Penetrations of electrical outlet boxes shall be in accordance with
221 Section R302.4.
222 2. In buildings equipped with an automatic residential fire sprinkler system, a".
223 [(9)] (10) In IRC, Section R302.2.4, a new exception 6 is added as follows: "6.
224 Townhouses separated by a common 2-hour fire-resistance-rated wall as provided in Section
225 R302.2."
226 [(10)] (11) IRC, Sections R311.7.4 through R311.7.4.3, are deleted and replaced with
227 the following: "R311.7.4 Stair treads and risers. R311.7.4.1 Riser height. The maximum riser
228 height shall be 8 inches (203 mm). The riser shall be measured vertically between leading
229 edges of the adjacent treads. The greatest riser height within any flight of stairs shall not
230 exceed the smallest by more than 3/8 inch (9.5 mm).
231 R311.7.4.2 Tread depth. The minimum tread depth shall be 9 inches (228 mm). The tread
232 depth shall be measured horizontally between the vertical planes of the foremost projection of
233 adjacent treads and at a right angle to the tread's leading edge. The greatest tread depth within
234 any flight of stairs shall not exceed the smallest by more than 3/8 inch (9.5 mm). Winder
235 treads shall have a minimum tread depth of 10 inches (254 mm) measured as above at a point
236 12 inches (305 mm) from the side where the treads are narrower. Winder treads shall have a
237 minimum tread depth of 6 inches (152 mm) at any point. Within any flight of stairs, the
238 greatest winder tread depth at the 12-inch (305 mm) walk line shall not exceed the smallest by
239 more than 3/8 inch (9.5 mm).

240 R311.7.4.3 Profile. The radius of curvature at the leading edge of the tread shall be no greater
241 than 9/16 inch (14.3 mm). A nosing not less than 3/4 inch (19 mm) but not more than 1 1/4
242 inches (32 mm) shall be provided on stairways with solid risers. The greatest nosing projection
243 shall not exceed the smallest nosing projection by more than 3/8 inch (9.5 mm) between two
244 stories, including the nosing at the level of floors and landings. Beveling of nosing shall not
245 exceed 1/2 inch (12.7 mm). Risers shall be vertical or sloped from the underside of the leading
246 edge of the tread above at an angle not more than 30 degrees (0.51 rad) from the vertical. Open
247 risers are permitted, provided that the opening between treads does not permit the passage of a
248 4-inch diameter (102 mm) sphere.
249 Exceptions.
250 1. A nosing is not required where the tread depth is a minimum of 10 inches (254 mm).
251 2. The opening between adjacent treads is not limited on stairs with a total rise of 30 inches
252 (762 mm) or less."
253 [(11)] (12) In IRC, Section R312.2, the words "adjacent fixed seating" are deleted.
254 [(12)] (13) IRC, Section R313, is deleted.
255 [(13)] (14) IRC, Section R315.1, is deleted and replaced with the following: "R315.1
256 Carbon monoxide alarms. For new construction, a listed carbon monoxide alarm shall be
257 installed on each habitable level of dwelling units within which fuel-fired appliances are
258 installed and in dwelling units that have attached garages."
259 [(14)] (15) IRC, Section R315.3, is deleted and replaced with the following: "R315.3
260 Alarm requirements. Listed single- and multiple-station carbon monoxide alarms shall comply
261 with UL 2034 and shall be installed in accordance with the provision of this code and NFPA
262 720."
263 [(15)] (16) In IRC, Section R403.1.6, a new Exception 4 is added as follows: "4.
264 When anchor bolt spacing does not exceed 32 inches (813 mm) apart, anchor bolts may be
265 placed with a minimum of two bolts per plate section located not less than 4 inches (102 mm)
266 from each end of each plate section at interior bearing walls, interior braced wall lines, and at
267 all exterior walls."

268 [(16)] (17) In IRC, Section R403.1.6.1, a new exception is added at the end of Item 2
269 and Item 3 as follows: "Exception: When anchor bolt spacing does not exceed 32 inches (816
270 mm) apart, anchor bolts may be placed with a minimum of two bolts per plate section located
271 not less than 4 inches (102 mm) from each end of each plate section at interior bearing walls,
272 interior braced wall lines, and at all exterior walls."
273 [(17)] (18) In IRC, Section R404.1, a new exception is added as follows: "Exception:
274 As an alternative to complying with Sections R404.1 through R404.1.5.3, concrete and
275 masonry foundation walls may be designed in accordance with IBC Sections 1807.1.5 and
276 1807.1.6 as amended in Section 1807.1.6.4 and Table 1807.1.6.4 under these rules."