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Home My WebLink AboutBUILDING CODES - 06-00427 - 216 N 1st E - ShedY Gv;sGr- �t�,l I-�ues� 24D3 Internat�onal +odes Complete Collection 2003 International Residential Code for One. and Two-Famfly Dwellings l CHAPTER G WALL CONSTRUCTION 1 R602 WOOD WALL FRAMING 602.11 Framing and connectians for Seismic Design Categories D1 andD2 . 602.11 Framing and connections dor Seismic Design Categories DI andD2 . The framing and connection details of buildings located ER Seismic Design Categories D1 and D2 shall be in accordance with Sections R602.1 1.1 through R602.11.3. 20[13 International Residential Code for On:� and Two -Family Dwell"ngs 1 CHAPTER 6 wai,L w1VN1 KUC't'lUN / R602 WOC I WATT, FR eMTNc i Km 11 u..,....:_._ VVL.J. A 1' x "11RA11.9 allu cannectivxxs for seismic Design Categories D1 andD2 . I R642.11.1 Wail anchorage. R602.1 1.1 Wall anchorage. Braced wall Line sills shah be anchored to concrete or masonry foundations in accordance with Sect'ons R403.1.6 and R602.1 1. For all buildings in Seismic Design Categories DI and D2 and townhouses in Seismic Design Category C, plate washers, a minimum of 11'4 inch by 3 inches by 3 inches (6.4 mm by 76 mm by 76 mm) in size, shall be provided between the foundation sill plate and the nut. - - 2003 International Residential Code for One- and Two -Family Dwellings / CHAPTER 6 WALL CONSTRUCTION / R602 WOOD WALL FRAMING / 602. 11 Framing and connections for Seismic Design Categories D1 andD2 R602,011.2 Interior braced wall panel connections. R602.11.2 interior braced wall panel connections. Interior braced wall lines shah be fastened to floor and roof framing in accordance with Table R602,3(l), to required foundations in accordance with Section R602.1 1. 1, and in accordance with the following requirements: 1. Floor joists parallel to the top plate shall be tie --nailed to the tap plate with of least 8d nails spaced a maximum of 6 inches (15a mm) on center. 2. Tap plate lips shad be face -nailed with at least sight 16d,nalIs 0n each side of the splice. 2UO3 International Residential Cade for one. and Two -Family Dwellings 1 CHAPTER f wa1,L C;ViVS1'KUCTION / R602 WOOD WALL FRAMING 1602.11 Framing and 4on�uectiuns for �eisma�c 19esign Categories DI andD2. / R602*113 Stepped foundationS. R602.11.3 Stepped found.ations. Where stepped foundations occur, the fallowing requirements appy: Where the height of a required braced waft panel thatextends from foundation to floor above varies more than 4 feet (1220 mm), the bracedWail panel shatl be constructed in accordance with Figure R602.1 1.3. 2. Where the lowest floor framing rests directly on a sill bolted is a foundation not less COPYRIGHT d 2003 by INTERNATIONAL CODE COUNCIL, INC. q z,7 I -Quest 2D03 Intemational Codes Complete Collection 2003 International Residential Code for One- and Two-, amily Dwellings / CHAPTER 4 FOUNDATIONS 1 R403 FOOTINGS / 403.1 General. / 403.1.6 Foundation anchorage. 403.1.6 Foundation anchorage. When braced wall panels are supported directly on continuous foundations, the wail woad sill plate or cold -formed steel bottom track shill be anchored to the foundation in accordance with this section. The woad safe plate at exterior wails on monolithic slabs and wood sill plate shall be anchored to the foundation with anchor bolts spaced a maximum of 6 feet (1829 mm) on center. There shall be a m nimum of two bolds per plate section with one bolt located not more than 12 inches (305 mm) or less than seen bolt diameters from each end of the palate section. in seismic Design categories a1 and C32, anchor bolts shall also be spaced at 6 feet (1829 mm) on center and located within 12' inches (3Q5 mm) from the ends of each plate section at inferior braced wall lines when required by Section R602.10.9 to be supported on a continuous foundation. Bolts shall be at least 112 inch {12.7 mm} in diameter and shall expend a minimum of 7 inches (178 mm) into masonry or concrete, interior bearing walk sole plates on monolithic slab foundations shall be positively anchored with approved fasteners. A nut and washer shall be tightened an each bolt to the plate. Sills and safe plates shad be protected against decay and termites where required by Sections R3182nd R319. Cold -formed steel framing systems shall be fastened to the wood sill plates or anchored directly to the foundation as required in Section R505.3. 1 or R603_ 1 . 'I . Exception: Foundation anchor straps, spiced as required to ,provide equivalent anchorage to 112-inch-diameter (12.7 mm) anchor buffs. e�� 2003 International Residential Codefor One. and Two-FamDily�� nry,s / CHAPTER 4 FOUNDATIONS I R403 FOOTINGS 1 4Q3.1 General. 1 403.x..6 Foundation. anchorage., 403a.1.6.1 Foundation anchorage 'n Seismic Design Categories G, DI and D2. 403.1.6.1 Foundation anchorage in Seismic Design Categor"I'es, C, D1 and D2. In addition to the requirements of Section R403.1.6, the following requirements shadl apply to wood light -frame structures in Seismic Design Categories D'I and D2 and wood light -frame townhouses in Seismic Design'Category C. � . Plate washers conforming to Section, R602.1 1.1 sha[f be used on each bolt. 2. Interior braced wall plates shall have anchor }jolts spaced at not more than 6 feet (1829 mm) on center and located within 12 inches (305 mm) from the ends of each plate section when supported on a continuous foundation. 3. Inferior bearing wall sole plates shad have anchor bolts spaced at not more than 6 feet (1829 mm) on center and located within 12 inches (305 mm) from the ends of each plate section when supported on a continuous foundation. 4. The maximum anchor boli spacing shall be 4 feet (1219 mm) dor buildings over COPYRIGHT O 2003 by INTERNATIONAL CODE COUNCIL, INC. SNAKE RIVER CHAPTER INTERNATIONAL CODE COUNCIL PO BOX 5022-01 1DAH0 FALLS,,EDAIFIO - (20,S) 612-8271 or (208) 782-3180 FEBRUARY 17, 2005 CODE COMNUTTEE REpORT 4' 2" X 2" FOUNDATION WASHERS IN IRC Section R602. l I. I of the 2Q 03 International Re,sidelntial Goc% (IRC) requi.�-es the use of a �_-�m % Bchmch b 3 iuc�. foundation sill plate washer in Seismic Design Categories Dx and D2and Townhouses in S��.smi.c Design Category C. HOWever �h.� X0 03 f-utemational. Bui�ci.�z�g Cede CIBC} allow - the use of a �1� 6 inch by .� �nc�. b 2 inch P I at e u�asher in all S eismic Desz� G�tegories D and E bv Section Z308.12.8. From the 2000 IRC Commentary and the 2003 IBC Structural Q&A App��ca�ian Guide we find the reason slated dor the 2x2 washers was tO compensate for the common construction practice of over s%z�.n.� bolt holes up to !/4 inch. The AF & PA 2001 National Specificaft"on Section 11 - 1.2.2 used as a referenced standard in both the 2[�O3 IBC and IRC stades that such a si.I� platebolt hole sfia.� be a x�aximum of 1I16 uzch .urger an th.e nomin.a� bolt diameter. The larger square washers enable axe nuc to apply enough elampi�� action between the si.� plate and feundation to prevent 10ngl*tudinal split-�ng of the siff plates and loss of lateral load capacity.clic testin� after the 1994 Narihridge Earthquake was used to vez7fy tae ��? washers were sufficient to ovale the added surface area needed. This only works fihQu� p Y �- i� ih� nuts are #ighiened suf�c�ently. In the April 2002 SCC Code ChazcFc Hearings the BuRding Se�.smic Safety Council Cade Resou'rce Suppvzrt Committee (BSSC-CR.SQ submitted Inde change X382--(32. This change added the 3x3 requirement to the 2003 IRC. The reason liven for the code change was to correspond to the 2000 NIEMRP Section 12.5,3 recomzaeading cla$er spacing between braced wall Eaes. No data was gi.ver, to suggest the Z� washers were not sufficient as used in the IBC- NEHRP is sun�.ar is the old "I�t's only a recommendation" rode pub out by HUD. On Fobruary I7, 2005 the Snake RO, - r Chapter of the Intemational Code Council mei and reviewed the aove i-nfornia�iqn. Tie members present voted to recommend the use of the 2x2 IBC compliant -washers in IRC applicadans under 11RRC Section R104.11 .Alternate Methods of Construction. The U�6 inch, maximum. over si.�i�ag a.�ha��s will. s#�.11. be required o� t�� 3x3 washers wi.ff have to be used in Design Category D. The, use of 2x2 washers in Desi �z Ca#egory G fc�x f aach ovexsized holes was also recommended as an optzan to r�placii�g the sill places. Also, the 2003 SBC Struc�u�-aI QB�A Applicaizon Guide does not recommend counfiersir�kiu of foundation s�I piat� anchor bolts w.��hout azo endegengineered s��n accoun�n.� for the reduced in. plane sb ear. The above information is OnWy au%delute and does no� �� erc�d� t��e Ivea.i Bulldin �fficials. authoritv! bode: Snake Ri..ver Chapter SCC En