The International Residential Code, 2021 Edition, is amended and changed in the following respects:
(A) Amend Section R202, Definitions, by adding the following definition:
Sleeping Room. Any room in the house that is greater than seventy (70) square feet, has a built-in closet space and typically could be used as a bedroom. This does not include rooms used for cooking, eating, family living or gathering and excludes bathrooms, toilet rooms, halls, storage, utility and workshop space and all unconditioned space.
(B) Amend Table R301.2, Climatic and Geographic Design Criteria, by adding the following:
Table R301.2 Climatic and Geographic Design Criteria
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Grou nd Sno w Load | Wind Speed (mp h) | Seismic Desig n Categ ory | Subject to Damage From | Win ter Desi gn Tem p. | Flood Haza rds | Ice Barrier Required | Air Freezing Index | Mea n Ann ual Temp. | |||
Weather ing | Frost Line | Term ite | Decay | ||||||||
25 | 115 | A | Severe | 42" | M-H | S-M | -3 | 1971 | YES | 1680 | 51.2 |
MANUAL J DESIGN CRITERIA
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Elevati on | Altitude Correcti on | Coincident Wet bulb | Indoor winter design temperature dry | Indoor winter design dry - bulb temperature | Outdoor Winter dry design temperature | Heating temperature difference | |
1,033 | N/A | 77% Humidity | 70 F | 1 F | 69 F | ||
Latitude | Daily range | Indoor summer design humidity | Indoor summer | Indoor summer design temperature | Outdoor summer design temperature | Cooling temperature difference | |
41.1543 623 | 50% | 75 F | 91 F | 16F | |||
(C) Amend Table R301.5, Minimum Uniformly Distributed Live Load, by changing the number "30" (live load for sleeping rooms) and replacing it with the number "40".
(D) Amend Section: R302.2, Townhouses, to read as follows:
Each townhouse shall be considered a separate building and shall be separated by a common two (2) hour fire-resistance-rated wall assembly tested in accordance with ASTM E 119 or UL 263. Such walls shall not contain plumbing or mechanical equipment, ducts or vents in the cavity of the common wall. The wall shall be rated for fire exposure from both sides and shall extend to and be tight against exterior walls and the underside of the roof sheathing. Electrical, cable and telephone installations are permitted, but shall be installed in raceways and metallic outlet boxes. Electrical installation shall be installed in accordance with the adopted electrical code in Chapter 10 of the Bellevue City Code. Penetrations of electrical boxes shall be in accordance with Section R302.4.
Exception: A common 1-hour fire-resistance-rated wall assembly tested in accordance with ASTM E 119 or UL 263 is permitted for townhouses equipped with an automatic sprinkler system installed in accordance with NFPA 13, provided the common wall does not contain plumbing or mechanical equipment, ducts or vents in the cavity of the common wall. The wall shall be rated for fire exposure from both sides and shall extend to and be tight against exterior walls and underside of the roof sheathing. Electrical installations shall be installed in accordance with the adopted electrical code in Chapter 10 of the Bellevue City Code. Penetrations of electrical outlet boxes shall be in accordance with Section R302.4.
(E) Amend Section R302.3, Two family dwellings. Delete exception 1 in its entirety.
(F) Amend Section R307.1, Space required, to provide as follows:
Fixtures shall be spaced as per Chapter 27 of the Bellevue Plumbing Code.
Delete Figure 307.1, Minimum fixture clearances, in its entirety.
(G) Delete Section R309.5, Fire sprinklers, in its entirety.
(H) Amend Section R310.1, Emergency escape and rescue opening required. Delete exception 2 in its entirety.
(I) Amend Section R310.6, Dwelling additions. Delete exception 3 in its entirety.
(J) Amend Section R310.7, Alterations or repairs of existing basements, to read as follows:
An emergency escape and rescue opening is required where existing basements undergo alterations or repairs.
Exception: New sleeping rooms created in an existing basement shall be provided with emergency escape and rescue openings in accordance with Section R310.1.
(K) Amend Section R311.3.1, Floor elevations at the required front door, to read as follows:
The landing or floor on the exterior side shall be not more than 7-3/4" (196mm) below the top of the interior finished floor provided that the door does not swing over the landing or floor.
(L) Amend Section R311.3.2, Floor elevations at other exterior doors, to read as follows:
Doors other than the required egress door shall be provided with landings or floors not more than 7-3/4" (196mm) below the top of the finished floor.
Exception: A top landing is not required where a stairway of not more than three risers is located on the exterior side of the door, provided that the door does not swing over the stairway.
(M) Amend Section R311.7.2, Headroom. Add the following as a second paragraph:
The Building Official shall have the authority to waive the requirements of this section where pre-existing conditions will not allow the requirements to be met.
(N) Amend Section: R311.7.8.2-4, Continuity. Add exception 3 to read as follows:
Exception 3. Handrails for stairways shall be permitted to have no more than a 4" break due to wall offsets and other ornamental features.
(O) Amend Section R313.1, Townhouse automatic fire sprinkler systems, to read as follows:
An automatic residential fire sprinkler system is not required to be installed in townhouses.
(P) Amend Section R313.1.1, Design and installation, to read as follows:
Design and installation for non-required systems. When a non-required automatic residential fire sprinkler system is intended to be installed within a townhouse, the system shall be designed and installed in accordance with NFPA 13 NFPA 13D or NFPA 13R.
(Q) Amend Section R313.2, One- and two-family dwellings automatic fire systems, to read as follows:
An automatic residential fire sprinkler system is not required to be installed in one-and two-family dwellings.
(R) Amend Section R313.2.1, Design and Installation, to read as follows:
Design and installation of non-required systems. When an automatic residential fire sprinkler system is intended to be installed, it shall be designed and installed in accordance with NFPA 13, NFPA 13D or NFPA 13R.
(S) Amend Section R317.1, Location required. Change location 2 to read as follows:
All wood framing members, sills, or plates that rest on concrete or masonry walls.
(T) Delete Section R317.1.1, Field treatment, in its entirety.
(U) Amend Section R318.1, Subterranean termite control methods, by deleting method 5 in its entirety and renumbering 6 to 5.
(V) Delete Section R318.1.2, Field treatment, in its entirety.
(W) Delete Section R318.3, Barriers, in its entirety.
(X) Amend Section R326, Habitable attic, and subsections R326.1, R326.2 and R326.3 to read as follows:
A habitable attic shall not be considered a story where complying with all of the following requirements:
1. The occupiable floor area is not less than 70 square feet (6.5 m2), in accordance with Section R304.
2. The occupiable floor area has a ceiling height in accordance with Section R305.
3. The occupiable space is enclosed by the roof assembly above, knee walls (if applicable) on the sides and the floor-ceiling assembly below.
4. The floor of the occupiable space shall not extend beyond the exterior walls of the floor below.
(Y) Amend Section R403.1.4.1, Frost protection, to read as follows:
Except where otherwise protected from frost, foundation walls, piers, and other permanent supports of buildings and structures shall be protected from frost by one or more of the following methods:
1. Extended below the frost line specified in Table R301.2
2. Erected on solid rock.
Exceptions:
1. Protection of freestanding accessory structures with an area of 750 square feet or less, of light framed construction, with an eave height of ten feet or less shall not be required.
2. Protection of freestanding accessory structures with and area of 400 square feet or less, of other than light framed construction, with an eave height of ten feet or less shall not be required.
Footings shall not bear on frozen soil unless the frozen condition is permanent.
General note:
1. Deck footings shall be twice the diameter of the supporting member.
(Z) Delete Section R403.3, Frost protection shallow footings, in its entirety.
(AA) Delete Table R403.3 (1) in its entirety.
(BB) Delete Figures R403.3 (1), R403.3 (3), R403.3 (4) and R403.4.(1) in their entirety.
(CC) Delete Sections R403.3.1, R403.3.1.1, R403.3.1.2, R403.3.2, R403.3.3, R403.3.4 and R403.4.1 in their entirety.
(DD) Delete Section R404.1.8, Rubble stone masonry, in its entirety.
(EE) Delete Section R404.2, Wood foundation walls, and subsections R404.2.1, R404.2.2, R404.2.3, R404.2.4, R404.2.5 and R404.2.6 in their entirety.
(FF) Change Section R502.6.2 Joist Framing, to read as follows:
Joist framed into the side of a wood girder shall be supported by approved framing anchors.
(GG) Amend Section 507.3, Footings. Delete all exceptions and amend to read as follows:
Decks shall be supported on concrete footings or other approved structural systems designed to accommodate all loads in accordance with Section R301 .Deck footings shall extend below the frost line specified in Table R301.2 in accordance with Section R403.1.4.1 and sized to carry the imposed loads from the deck structure to the ground as shown in Table R507.3.1
(HH) Amend Section 507.3.1, Minimum size, to read as follows:
The minimum size of concrete footings shall be in accordance with Table R507.3.1, and allowable soil-bearing pressure of 1,500a pounds per square foot.
a. Where the building official determines that in-place soils with and allowable bearing capacity of less than 1,500 psf are likely to be present at the site, the allowable bearing capacity shall be determined by a soil investigation.
(II) Delete Table R507.3.1 in its entirety and replace with new Table R507.3.1 Minimum Footing Sizes for Decks.
TABLE R507.3.1 MINIMUM FOOTING SIZES FOR DECKS
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Footing Depth | Footing Diameter Allowed (1,500 psf soil-bearing pressure) | ||||||
8" diam | 10" diam | 12" diam | 14" diam | 16" diam | 18" diam | 20" diam | |
42" | <941 lbs. | < 1340 lbs. | <1805 lbs. | <2334 lbs. | <2930 lbs. | <3591 lbs. | <4316 lbs. |
48" | <1481 lbs. | <2071 lbs. | <2747 lbs. | <3509 lbs. | <4360lbs. | <5298 lbs. | <6323 lbs. |
Post diam | 4x4 | 4x4 | 6x6 | 6x6 | Engineere d | Engineere d | Engineere d |
(JJ) Amend Section R507.4, Deck posts, to read as follows:
For single-level decks, wood post size shall be in accordance with Table R507.3.1 and post height in accordance with Table R507.4
(KK) Delete Table R507.4 and replace with new Table R507.4
TABLE R507.4 DECK POST HEIGHT
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Deck Post Size | Maximum Height (feet-inches) |
4X4 | 6 |
4X6 | 8 |
6X6 | 14 |
8X8 | 14 |
(LL) Amend Section R903.4, Roof drainage, to add existing paragraph as follows:
When roofs are sloped to drain over the edge, scuppers or gutters and down spouts, adequately sized, pitched and supported, shall be installed to conduct rain water to ground level. Rain water shall be discharged at least three (3) feet away from the building foundation in a direction parallel to the adjoining property line.
Exception: Structures with no sub-grade spaces.
(MM) Delete Section R908.3.1, Roof recover, in its entirety.
(NN) Amend Section R908.3.1.1, Roof recover not allowed, to read as follows:
A roof recover shall not be permitted.
(OO) Add new Section R908.7, Roof maintenance - repair, to read as follows:
No roofing permit is required for any maintenance or repairs that are an accumulative of one roofing square (100' sq) or less provided there is only one layer of existing roof covering. Any reroofing exceeding one roofing square (100' sq) requires a permit and the entire roof to be brought up to current code.
(PP) Delete Chapter 11, Energy Efficiency, in its entirety and change to read as follows:
One- and Two-Family Dwellings shall be designed and constructed in accordance with the 2018 International Energy Conservation Code as amended in Chapter 8, section 8-18(B) of the Bellevue City Code.
(QQ) Delete Chapter 25 through Chapter 32 in their entirety and substitute the same with the following:
a. The plumbing requirements shall conform to the provisions of Chapter 27 of the Bellevue City Code.
b. When installed; fire sprinkler systems shall be installed in accordance with NFPA 13, NFPA 13D or NFPA 13R.
(RR) Delete Chapter 33 through Chapter 42 in their entirety and substitute the same with the following:
a. The storm drainage requirements shall conform to the provisions of Chapter 27 of the Bellevue City Code.
b. The electrical requirements shall conform to the provisions of Chapter 10 of the Bellevue City Code.
(Ord. 3334, § 1, passed 10-11-2004; Ord. 3377, § 1, passed 10-24-2005; Ord. 3518, § 1, passed 5-11-2009; Ord. 3654, § 1, passed 11-28-2011; Ord. 3791, § 1, passed 12-8-2014; Ord. 4033, § 1, passed 5-4-2021)