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HomeMy WebLinkAboutPermit File BLD-2020-0200 3920 S Avenue (4)Deck Code Interpretation 16-11 TIN eccn� � ir�d prac . �, " �- � ; -d'r eren �� en L r i "0 merit .d � ��� , � � i� h ., # : = r i n in nd d M ude Vie; u of c r n on r� _ �- � 1. ,ihaving, , , .. �� ; , , has lxr r��t ll_-rna-1 rtbe o#�,� r hri ,_� Every► tort has �d hie I n �n r , ' . �, n min `- at dell ��s d' Is parkr 'uris cfi v r.., ..:, �... ZE VENTS RE oils JOT ° ' :O soft .M. i IA� BT REQL=7-4E r ' I IF gd we to I'MiAsIt bed to ie hours tcw'ces. �... .Y. See L ti F ....�= f' . 't on UPI dea lqa3rjLj2 4 ffinialL , � i t #` Lz 6 �: iiiii .� ; mom= �Tn , . -sit INS I ca : t ISMSa DN a an6*7„ ,Mb � - �r or be V e ` _ , . treated Inca n . •el. Is � a Is ;? Mr Coutact . toti w Awl floor ; r . 1 . U ashall ,V _J x jaztenErs are .. .tic ., �ecl e MnA SM be a,: justeds, Find nails ftol Ph F-1!0 pwas - ai ' E. �_- .Sa` — TA' 'f..E�"�i.'S. ",. L.4—L� ., ,-a - -.� a v, .; a . L Ca ,. w ZCKLA Aw� 93 �- 6 k 1 :. �� s, s:•. • aA. .-. �, ;. ,r,.a .r,iC.-..a as ..d sw.. ..ra ka.., aw.-s.. sw ms a . AM ..1 ST ZD a nil y 19 R Wig, : F' `ed, ML471g. ; Standard st z .= IF " 1 't TS.�` and .s 0 'lass . �,. ►► ma et Gad {."''� y. to be: Gf mechmically- :at : : As ated mrcn �- -iih c�:ti�� ���S ate, 2-C�: . be Fir. UaW aWe to Fin IN -7 414 .,-� Pam` is 4`� the .;'� -1 . �. du a to �. --�i - �AMA shah yet .�% : �Al -316 w and corztim on s be of -me it is. don lDa& such as MIN it��IsI ding TIP IF klr ,1. 11L S .�_ E � C �i n. YeZ aT .: I erg . Oj ry G,: nen�j 0i 0 1 !g-. thi• mems of j.ot be lused in. diiect corLtact mrithvi lumber tr et- �r�1M.1t:z If i ci � w-timer .n me±-Gdr. r materiale, nGt desczibe6 h,Rrrw;4m". ibleI to Co murnon Specues and Use Categones or Decay Res[stan rlem Above Ground UC:39; Contact . Naturally duSpecies. h gWD hem .. in ° i� i Gn ea . : S n n�t s per inirx�urr� r uir� � . te omam a, IL � � �f t each 'GSA Try . - ed dg naih r screws.decking :10=T See 1yA Fi L 11 for decking _. cm c o re �j tzz at the i I : 4;4r, ;�.A+� P�mvAewmml the e assm __ u z . , ,- thGther end of the j L.t amA does not � ude the lenyth the v mnss. f�� s: 'a � �t fi rah e ` 1 ri r; z . Lt, � .F 1 Nth 1 zs �` Figuxe 1 ,a:r,d Fire 2 f t tl �i COMMON WMBER WffH NO CANTILEVER' WITH CANTILEVERSO PE1E"riche) 12 16 24 12 16 24 2 8 11- 1 D-2 8-11 9-10 -11 79 southern Pine 2 x 10 1 1 M 10-11 15_5 134 10-11 2 x 12 17�5 15.5 1. 7 17=11: 15- 12 o Lg 1 s fir= 2 x 8 0�10 9-005 7 9J M T�7 larch;", here -fir" spr cee pin e4iir 2 x 10 1-3 1 -6 94 1 3- 1 - 9-57 2 12 154 1 ?� 10-1 15_5 134 107-1 Redmodl 2 x 8 9-10 - 6 6-11 8_ a -iG 6�1 We tern cedars,' ponderos-a p hieel red pine 2 x ID 12-O 1 M M 112-1 1 IL B 7 2 x 12 13�11 12 9A 14_0; 12- 9-1 Fbr 31: 1 inch = 25A rr,;, I foot = 4.B nvn, 1 pound per square x _ IM4 9 kPa, 1 pound _ OA-54 kg a. No� 2 grade with. wsmnts etivicee factor. b= Gro urea snow load, 1'N a load = BO psf, dyad load = 1 eD psf, lam' A. _ ow arc=ur 1 � lip load = I s:j dead load = 10 plsf, L'A = 3- 0 at man span, UA = 180 a cantilever with a 22 impound point load applied tm end. d. Includesincising fac`.�r_ e. Northern sp4ecies, vAh no incLsing factor f. Cantilevers spans nci7 exceeding the nominal depth oftheJoist are [te . rn Jt 1 -� 41 dianging i cnl� �ry 4 ea. _ �:��.., "� 5 .'` = m �.��� � �. _ a � . ,,� .l � ��� �k�i�i �"L� � �I L�i� � � l �� � � � �� � y� y i �� '� r�F � �� .. �.� ��:� �� - �. µ�� the � : ��.,�� �� �� .� _ �� . � ' ' .� F � w A �� y k' ��' �� �1��=ja .......... �� �:� T.�hl i�fi �I; ._..._k� awww, -�. -sr�. -rr® -awe .awry , �� �, �,� e L� __ ���. �. � k =� � • _., � '� .� }.. �1�� � ��.� � � . � � � � r� � : - � . - ate. ��� _ �. ... REIFG I �E'� — 2 Ya 10 . x 1 o 2.2 3 x 1D o larGhe he . fir y src-Pine-fire 3 x 12 o redwood westem2 arm ponderosa pi ile rE d pine" 6 — — — 1141 w - -,O y 5 -0 '9 i10 127�7 1 1J ¢ 2 I LA I Z-PPAN f MAN L. r raw , T SEZO 1 zPECIES' F'Or GA454 kg.- S : inch ,. � �mom, 1 f .i = 3134.8 rn,: 1 pound er square fw � 13.,131�' ����P,, 1 ou-n � . with a 220�paund point load, applied at the end. v Beams, �- side 14., 1, . grade, , � sere factr. Bi , i t 1 h - than, or equal t e h s ' - ,y s beam r�_ : . f. I l em indialng fc-fi r4 t-b-nAthe speves Ind IN oscur at each end' � � I � �beam gpbcs MI, Ffmsembly- 1Hi r WS ttac each outslar, mer, .e Inside m beirivs, shmvit h r. law ttnof Ftheb w; lce erg; splits s hall be Ob.® l�an f o T Ur H deam ttlwa d ,,. -ta Stir hmz s in l� i g t r to v �I yea - 7 �l>c �rJ�r h„. tor; I% �2 a Table. 61) JOIST -TO -BEAM CONNECTION Each j oist shall be attached to the beam as shown in Figure 6. Joists may bear on and overhang past the beam face the lesser of Lo or L/4 when Option 1 or Option 2 is used to attach the joist to the beam and blocking is provided between joists at beam bearing. Mechanical fasteners or hurricane clips used, as shown in Option 2, Figure 6. Joist -to -Beam Detail. 3-8d threaded OPTION '1 toe nails (2 on one side, 1 on the other VM beam oPTioN �* mechenic�l fastener or hurricane clip must have a minimum capacity of 100 lbs in both uplift and lateral load directions. Joists may also attach to the side of the beam with j oist hangers per Option 3. Joists shall not frame in from opposite sides of the same beam. See JOIST HANGERS for more information. Hangers, clipS. and mechanical fasteners shall be galvanized or stainless steel (see MINIMUM REQUIREMENTS). oPT�oN 3� top of beam or joist ledger and joist hanger must be at same elevation � 1 11\ III o 'see manufacturer's recommen�etons for additional requirements JOIST HANGERS Joist hangers, as shown in Figure 7, shall have a depth of at least 60% of ledger or beam depth. Each hanger shall have a minimum vertical capacity in accordance with Table 3A. The j oist hanger shall be selected from an approved manufacturer's product data based on the dimensions of the joist or header it is carrying. Joist hangers and fasteners shall be corrosion resistant (see MINIMUM REQUIREMENTS)* Use joist hangers with inside flanges when clearances to the edge of the beam or ledger board dictate. Do not use clip angles or brackets to support joists. Table 3A. Joist Hanger Vertical Capacity. Joist Size Minimum Capacity, Ibs 2x6 400 2x8 500 2x10 600 2x12 700 Figure 7. Typical Joist Hangers. joist hanger with insidE American Wood Council � �b 17 � '6 7 � 'b � �6 POST REQUIREMENTS All deck post sizes shall be 6x6 (nominal) or larger, and the maximum height shall be in accordance with Table 4 and measured from grade or top of foundation, whichever is highest, to the underside of the beam. Under prescriptive limits of this document, 8x8 nominal posts can be substituted anywhere in Table 4 but are limited to a maximum height of 14'-0". Posts shall be centered on footings. Cut ends and notches of posts shall be field treated with an approved preservative (such as copper naphthenate) [R402.1.2] . The beam shall be attached to the post by notching as shown in Figure 8A or by providing an approved post cap to connect the beam and post as shown in Figure 8B. All 3-ply beams shall be connected to the post by a post cap. All through - bolts shall have washers under the bolt head and nut. Attachment of the beam to the side of the post without notching is prohibited (see Figure 9). Provide diagonal bracing parallel to the beam at each corner post greater than 2'-0" in height as shown in Figure 10. Diagonal bracing is prohibited on center posts. Bracing shall be fastened to the post at one end and the beam at the other with 1/2" diameter lag screws. For non -ledger decks, (see Figure 21) diagonal bracing maybe omitted at the beam and posts adjacent to the house. Figure 8A. Post -to -Beam Attachment Requirements. Single 3" or �ii nominal or double �" nominal beam beam must bear fully on notched 6xb 6x� min. Typical Post (�) ��" diameter through -bolts with washers ir]'�/ Ti At Splice Figure 8B. Alternate Approved Post -to -Beam Post Cap Attachment. Figure 9. Prohibited Post -to -Beam Attachment Condition. Figure '10. Diagonal Bracing. Note: Support of beams wI fasteners only is prohibited. Bearing is required. See Figure 8A. DI��ON�L B��IN� P�LLEL T� BEl�fV1 Note: Diagonal Bracing is prohibited on center posts, American Wood Council RIM JOIST REQUIREMENTS Attach a continuous rim j 01st to the ends of j oists as shown in Figure 11. Attach decking to the rim j oist as shown in Figure 11. For more decking attachment requirements, see DECKING REQUIREMENTS . Figure 11. Rim Joist Connection Details. NIEMEN- FOOTINGS �R403� See Figure 12 and Table 4 for footing size, footing thickness, and post attachment options and requirements. All footings shall bear on undisturbed soil at least 12 inches below the undisturbed ground surface or below the frost line, whichever is deeper. Contact the authority having jurisdiction to determine the specified frost line. Bearing conditions shall be verified in the field by the building official prior to placement of concrete. Where the building official determines that in -place soils with an 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 soils investigation. -�-socuro docking fio flop OI rrn joist Wifih 'f Od threaded nails or #10 x 3" minimum. wood screws All O.c. � joisfi fi0 and Of e�c� foist wifi� ire ded nails or (3) #10 x 3" Wood screws DECK FOOTINGS CLOSER THAN 5'-0" TO AN EXTERIOR HOUSE FOUNDATION WALL MUST BEAR AT THE SAME ELEVATION AS THE FOOTING OF THE HOUSE FOUNDATION. Do not construct footings over septic systems or leach fields, utility lines, or enclosed meters. Contact local utilities (call 811) before digging. Pre -manufactured post anchors shall be galvanized or stainless steel. See MINIMUM REQUIREMENTS. American Wood Council a 1, Table 4. Post Height for 6x65 and Footing Sizes for all Posts. Post Heights' Footing Sizes2 LM n J J i 4) 4000 = LL U) Cn CO4) 4)L L 00 M 00 .~ 00 C) M•- p a. 0 L tL "a M L ._ ._ CO u' Cr O 0 O t 0 = (- o UL 510' 14' 14' 14' 14' 14' 18 16"x16 7" 6' 514' 14' 14' 14' 14' 14' 21 " 18"x18 8" 18' 14' 14' 12' 14' ill 24 21 "x21 " 10" 510' 14' 14' 14' 14' 14' 20 18x18 8" 8' 514' 14' 14' 14' 14' 11' *?Alf "x21 If 10" <_18' 14' 13' 11' 12' 8' 27" 24"x24 11 " 510' 14' 14' 14' 14' 12' 23" 20"x20 9" 10' 514' 14' 13' 11' 13' 8' 27" 24"x24" 11 If 518' 12' ill 8' ill 2' 31 If 2 7"x2 7" 13" <_ 10' 14' 14' 12' 14' 10' 25" 22"x22 10" 12' 514' 13' 12' 9' ill 5' 30 26 "x2 6" 13" <18' 11' 9' 6' 9' 2' 34" 30"x30" 15" 510' 14' 13' 11' 13' 8' 27" 24"x24 11 " 14' 514' 11' 10' 7' 10' 2' 32" 29"x29" 14" 518' 9' 8' 2' 8' N P 37" 33"x33" 16" <_ 10' 13' 12' 10' 12' 6' 29" 26"x26" 12 11 16' <14' 10' 9' 5' 9' 2' 35" 31 "x31 it 15" 518' 7' 5' 2' 7' N P 40 35"x35" 18" 510' 12' 11' 8' 11' 2' 31 27"x27" 13" 18' 514' 9' 8' 2' 8' N P 37 33"x33" 16" <-18' 1 S' 1 2' 2' 6' NP 42 37"x37" 19" 1. Assumes 40 psf live load, 10 psf dead load, LB/4 and Lj/4 overhangs, No 2. Stress grade and wet service conditions. 2. Assumes 1,500 psf soil bearing capacity and 150 pcf concrete. Value may be multiplied by 0.9 for corner posts. 3. Incising assumed for Douglas fir -larch, hem -fir, and spruce -pine -fir. 4. Assumes 2,500 psi compressive strength of concrete. Coordinate footing thickness with post base and anchor requirements. 8x8 nominal posts may be substituted anywhere in Table 4 to a maximum height of 14'. 5. American Wood Council Figure 12. Typical Footing Options. posts must be centered on footing about V � per Table 4 per Table footings must bear on undisturbed soil LEDGER ATTACHMENT REQUIREMENTS LR-�1 GENERAL: Attach the ledger board which shall be but ends of posts shall be field treated h an approved wit nr�cror\j,qfiivo lfii jrh equal to or greater than the deck j oist depth but less than or equal to the house band or rim joist depth, to the house in accordance with Figures 14 and 15. The ledger shall be a minimum nominal 2x8. When attachments are made to the house band j oist, the band j oist shall be capable of supporting the new deck. If this cannot be verified or conditions at the house differ from the details herein, then either a non -ledger deck or full plan submission is required. See NON -LEDGER DECKS. SIDING AND FLASHING: House siding or the exterior finish system must be removed prior to installation of the ledger board. Approved corrosion resistant flashing is required at any ledger board connection to a wall of wood framed construction (see MINIMUM REQUIREMENTS). See Figure 14 for continuous flashing with drip edge. The threshold shall be carefully flashed and caulked to prevent water intrusion due to splash from the deck or melting snow and ice. MANUFACTURED WOOD I -JOIST: The term "I - Joist" denotes manufactured wood "I" joists (see Figure 13A). Many new homes constructed with wood I j oosts include 1" or thicker engineered wood products (EWP) — gravel such as oriented strand board (OSB) or structural composite lumber (SCL) including laminated veneer lumber (LVL) — as band joists (or rim joists) that can support the attachment of a deck (see Figure 14). However, some older homes might be constructed with band boards that are too thin (less than 1 ") to support a deck. In such cases, a non -ledger deck or a full plan submission is required. MANUFACTURED WOOD TRUSS: A metal plate connected wood truss (MPCWT) is an engineered, prefabricated structural component designed for each specific application. MPCWT's used in residential floors are often installed with a 2x4 lumber "ribbon" at the ends of the trusses (see Figure 13B) to tie the ends of the trusses together. The ribbon board, by itself, is not intended to support the deck ledger and deck. Installing residential decks when the floor system for the house uses MPCWT requires a standard detail provided by the truss designer, a non -ledger deck, or a full plan submission. Refer to the Technical Note — Attachment of Residential Deck Ledger to Metal Plate Connected T�ood Truss Floor System for special blocking details and attachment requirements (www.sbcindustry.com). American Wood Council r r � 'b � 'b r. � 'b r Figure 13A. Wood I -Joist Profile. Figure 13B. Metal Plate Connected (MPC) Wood Floor Trusses with a 2x4 Lumber "Ribbon" at the Ends of the Trusses. ��� RlDE3�t'►d B��RD � not intended for d Figure 14. General Attachment of Ledger Board to Band Joist or Rim Joist. exterior sheathing existing stud wall existing �x band joist or 1" minimum EIlvP rim joist �x floor joist, wood I �olSt, or MP�W? existing gall �" min. � -��/8" min. �" max. �" min. remove siding at ledger prior to installation threshold carefully flashed and caulked to prevent water intrusion lodger and joist flush on top continuous flashing extending past joist hanger dock joist 'i!�" diameter lag screws or �, through -bolts with • • � washers joist hanger e . . � �� ledger board; must be greater then or equal to the depth of the deck joist and no greeter then the depth of the house bend or rim joist Figure 15. Attachment of Ledger Board to Foundation Wall (Concrete or Solid Masonry). existing concrete or solid masonry' wall �l\lote: docks filled with grout or concrete at anchor locations for new construction embed anchors per manufacturer recommendations to resist corrosion and decay, this area should be caulked deck joist � I�" diameter approved expansion, epoxy, or adhesive anchors with washers st hanger �� ledger board; must be greater than or equal to the size of the joist MPS FLooR TRI�S��� l o N iIVV�LL American Wood Council Armchme= To emenor -veneetza ibllewkg masonryw cknf�A �7o0w c anal to candle d fior ircafiang Dr ibited bay windDws are pr6ha. (see Fig=es 17 and 18). Th comes, the rmr.4edgger deck v remove. (See. `p IED GERDECD) c9 titre 7. MAt GhmenttoorThrough Exterfor Veneers (Brick, Mason1my, n )c t��e a _no� n lamer ab nrr: Frgure No Attachment to House Ovefhang Ledger® e Mr�� �s �: play: or �.1. Plate.r� 1 zr. r. or '' n7 e A per Viable d E N� ��� �� ; CONNECTION 'rpm" L T t °1�1 pp t 1 da o; 1 to `� DETAILS 6-rand less � t to I � 1 a 1f 16 1 -center spacing of fasite eIr 1%1z inch diameter lag screw with �4,-1 Chi ch 22 16 13 11 14 inch iameter boft with11 inch maximum 30 22 18 1 sheathing" lr� inch iam titer bo t with 1 inch mire 1-9 16 13 11 sheathe g Far 31: 1 inch; = 25 rrr r uI foot , _ 30_ mr, 1 pound per square _ 0.14 7 9_ I.Pa_ Joist �. Led�r� prevent afier �r� nAig the house b The �13 of the laa s�,c% nt�,..shaCl fug extend nd e inside face of the band Joist, nea�th[_n snaK be it = .d stru rar pan or sond sawn Cu rl' e _ Sheathing shall: be ten ii_ ed 10 be strucrluffaf ► 1, s su-rn L ►rdA fiberboard, lumber or fern sheathing. Up o 1 ' rich tbickness of s� Led washers shall be , tte s ure f u o j�-i c c 21 f all abl'eheatTni'n tcknss re unx:)mbined 1withwood- struct ra[ panel or Ifum er sh athi ng. L 14 t Gi se ( . lts M �: :. LCL erg s rr ��., � � � , . •ter r- U-, fl .� e ,1 .•� - a � shGmm�. lei. Tmre 1 .. he lag screurn,orboltss 1le staggexed. om the top to the bottom a the hoirizontal run o. an } T.v-z or bolts siq be niremfied ywr the auihon1:k'p � : ne j ± [ t r . Ledger Boar FastenerSpacing. n l- ran e t T *d S' a�$fi7 w • ,%may _ IIITIG'Ugh Wilts ShzlL bavea dieter of a pilot '17 to �; `whz "be in r _ .- t t Alt :. tia Peager D ozrd D a c: ~ eye te or z gun masomT `ddametet of Mini3 i� met hole M t lees' b _ � . a 1�t LG t boar. f the -o�.r.•�,:DO INOT 4 i rails i taer yin ?� +O ail raced to 1ha' I " �'rSJ'` Y �.pffj rcrewz shall have a dLametu of lfjiF see 211 � L1 :i1 �UT, E v. - , S" .1,as= sxexews may be n � tilyfier fi -fieldti �. c oo# to thovs� : lI i, . 're fi 1 I ILI �. -1 i .s'atened (snug 1, ut n NON -LEDGER DECKS -FOR RESISTING VERTICAL LOADS Non -ledger decks use the house for resisting lateral loads but do not utilize the exterior wall of the house to support vertical loads (see Figure 21). Rather than supporting the deck on a ledger, an additional beam with posts is provided at or within the lesser of Lo or L/4 of the house. THE ASSOCIATED DECK POST FOOTINGS SHALL BE PLACED AT THE SAME ELEVATION AS THE HOUSE FOOTING IF LOCATED CLOSER THAN 514' TO A HOUSE WALL (see Figure 2 and Figure 12). For houses with basements, a cylindrical footing (caisson) is recommended to minimize required excavation at the basement wall. Beam size is determined by Table 3. Non -ledger decks shall be attached to the house per Table 5 and Figures 22 or 23 for lateral loads. Figure 21. Non -Ledger Deck - For Resisting Vertical Loads. blocking between overhanging joists at beam bearing rim joist rim joist joist overhang existing house foundation wall beam, �� eck footings must be at posts same elevation as joists existing house footing install diagonals if located closer than per Figure 10 5$41 to house wall Dote: Tension device not shown. See provision for deck lateral forces. DECK LATERAL LOADS Attachment to House: Decks shall be positively anchored to the primary structure [R507.1 ] . The lateral connection required shall be permitted to be in accordance with Figure 22 or 23 for ledger and non - ledger decks. Hold-down tension devices shall be provided in not less than two locations, and shall have an allowable stress design capacity of not less than 1,500 lb [R507.2.3] . The wall must be sheathed with minimum 3/g" wood structural panel sheathing. Use lag screws or bolts when when fastening to a band j oist; use expansion anchors or epoxy anchors when fastening to concrete or masonry. DO NOT ATTACH TO BRICK VENEERS. VERIFY THIS CONDITION IN THE FIELD PRIOR TO UTILIZING THIS METHOD. Fasteners shall penetrate beyond the house band board and per Table 5. be installed i For non -ledger decks, blocking or framing angles can be used in lieu of j oist hangers and shall be provided on each side of each joist. Blocking shall be installed with 5-lOd threaded nails into the rim joist or the framing angle shall have a lateral capacity of 600 lb. Flashing over the rim j oist is required and must be installed in accordance with the flashing provisions in the LEDGER ATTACHMENT REQUIREMENTS. American Wood Council Figure 22. Lateral Load Device with Joists Parallel to Deck Joists. floor sheathing nailing at maximum on center to joist with hold down solid sawn floor joist attach #01 joist w/ a minimum of (19) 8d nails minimum �x� x 3fi" attached to joist web w/ (16) 19d nails and clinch I joist fasteners per Table hold-down or similar torsion device threaded rod, may be sloped up to 1:19 away from the house VT beam & post for non -ledger decks {for non -ledger decks, blocking or framing angle) fasteners per Table � hold-down or similar tension device threaded rod, maLnRj sloped up to 1:1 2 away from the house (for non -ledger decks, blocking or framing angle) Figure 23. Lateral Load Device with Joists Perpendicular to Deck Joists. extent of blocking a#tech blocking to deck wJ 10d nails at �" o.c. staggered minimum 1 �" thick blocking. Blocks must f 11 bay and f#snugly floor joist (1 joist or solid joist) joist hanger (for non -ledger deck., blocking, or framing angle) deck joist beam &post for non -ledger decks threaded rod, may be sloped up to 1:1 2 away from the house fasteners per Table 5 hold down or similar Pension device deck joist beam & post for non -ledger decks American Wood Council GUARD REQUIREMENTS All decks greater than 30" above grade are required to have a guard [R312.1 ] - one example is shown in Figure Figure 24. Example Guard Detail. ��� post, typical D0 NOT NOTCH 36" minimum I �'-�" maximum spacing 24. Other methods and materials may be used for guard construction when approved by the authority having jurisdiction. 2x2 baluster, typical - 6 or 5/4 board rail cap: attach to uard post with (3} #12 by 3" long screws or (3) 189threaded nails with 0.148" nominal diameter gd diameter---� through -bolts and washers o enin s shall not allow p 9 the passage of a 4" diameter sphere GUARD POST ATTACHMENTS FOR REQUIRED GUARDS Deck guard posts for required guards shall be a minimum 4x4 (nominal) with an adj uste d b ending design value not less than 1,100 psi. Outside j oists and rim joists to which guard posts are attached shall be a minimum of 2x8 (nominal). Guard posts for required guards which run parallel to the deck j oists shall be attached to the outside j oist per Figure 25. Guard Post to Outside -Joist Example. guard post dia. through - bolts and washers — 2" min. 2" min. flutSide jt7lst� 2�8 (nom.} 2�t4 top and bottom; attach to guard post with (2)8d threaded nails or (2}#8 wood screws >_2" 1/2' long on inside face � minimum nominal 2x8 rim or outside joist --attach balusters at top and bottom with (1)#8 wood screw or (2)8d post4rame threaded nails with 8.135" nominal diameter Figure 25. Guard posts for required guards that run perpendicular to the deck j oists shall be attached to the rim joist in accordance with Figure 26. Only hold-down anchor models meeting these minimum requirements shall be used. Hold-down anchors shall have a minimum allowable tension load of 1,800 pounds fora 36" maximum guard height and be installed in accordance with the manufacturer's instructions. see FIGURE 24 for guard component attachment requirements guard posts can be installed as ' shown in Figure 2� (between jt�ists ) if blocking is installed as shown below within 12" of each side of the post at first interior baby provide 2� blocking at ward posts with hold-down anchors; attach blocking with � 0d threaded nails top and bottom, each side t7UtSid� j�lst-�---� min . 2�t8 (nom.} Alternate afitachment of hold-down anchors to framing members passible per manufacturer's instructions. guard post* PLAN 1�lEVV American Wood Council r ® �Y r � �Y Figure 26. Guard Post to Rim Joist Example. soo �1GlJ%Z� �4 'for guard component attachment requirements guard post rim joist min. 2�� �nom.} hold -dawn anchor joist minimum �2}�I2"-� diameter through - bolts end vveshers alternate �tt�chmenfi ofi hold -hewn �n�hers to framing members passible per manufa�t�rer's insfiru�fiiens. 2" min, �-���" min. and �" max. �" min. Stairs, stair stringers, and stair guards shall meet the requirements shown in Figure 27 through Figure 34 and Table 6 except where amended by the local jurisdiction. A11 stringers shall be a minimum of 2x 12. Stair stringers shall not span more than the dimensions shown in Figure 28. If the stringer span exceeds these dimensions, then a 4x4 post may be provided to support the stringer and shorten its span length. The 4x4 post shall be notched and bolted to the stringer with (2) %2" diameter through - bolts with washers per Figure 8A. The post shall be centered on a 12" diameter or 10" square, 6" thick footing. The footing shall be constructed as shown in Figure 34 and attached to the post as shown in Figure 12. An intermediate landing may also be provided to shorten the stringer span (see provisions below). If the total vertical height of a stairway exceeds 12'-0", then an intermediate landing shall be required. All intermediate stair landings must be designed and constructed as a non -ledger deck using the details in this document. Stairs shall be a minimum of 3 6" in width as shown in Figure 3 3 [R311.7] . If only cut stringers are used, a minimum of three are required. For stairs greater than 36" in width, a combination of cut and solid stringers can be used, but shall be placed at a maximum spacing of 18" on center (see Figure 29). The width of each landing shall not be less than the width of the stairway served. Every rectangular landing shall have a minimum dimension of 36" measured in the direction of travel and no less than the width of the stairway served [R311.7] . hold-down anchor joists _ _ _- align guard post et joist locations rim joist min. 2x8 (nc hold-down ancf��� at joist loc�tian between joists %'i~.�N 1/lE1�S guard post rim joist min. 2x� �nom.) Figure 27. Tread and Riser Detail. 7-31�" maximum riser; height shall not deviate from one another by more than 3I�" riser may be open, but shall not allow the passage of a �" diameter sphere '10" minimum tread width risers; 1x material, minimum treads; see 1~igure �9 and Table � 3/�" -- � -'I I�" nosing; nosing shall not deviate from one another by more than 3l8" American Wood Council Figure 28. Stair Stringer Requirements. max. span - 13'-3" SOLID SPRINGER Figure 30. Stair Guard Requirements. stair guard is required for stairs with a total rise of 30" or more; see GUARC REQUIREMENTS for more information stair guard height: 34" min measures from nosing of stef Openings for required guar �� U, , sides of stair trews shall not allow a sphere 4W3/8" to piss through.. not permit the passage of a 5" diameter sphere. Figure 29. Tread Connection Requirements. Attachment per tread at each stringer or ledger: 2x or 5/4 treads - (2)8d threaded nails or (2)#8 screws ?2-1 /2" long 3x treads - (2)18d threaded nails or (2#8 screws _>3.112" long stringer treads: 2x or 5/4 board 18" max I � I 18" max stringers CUT STRINGER treads: see Table 8 38" max 2�4 ledgers, each side, full depth of tread; attach with (4)10d threaded nails or (4)#8 wood screws ?3" long SOLID STRINGER Figure 3'1. Stair Stringer Attachment Detail. rim joist or — outside just sloped joist hanger, --� minimum vertical capacity of 5251bs; see JOIST HANGERS for more requirements ATTACHMENT WITH HANGERS Table 6. Minimum Tread Size for Cut and Solid Stringers. Species Cut i Str nger Solid Stringer Southern Pine 2x4 or 5/4 2x8 Douglas Fir Larch, Hem -Fir, SPF 2x4 or 5/4 2x8 or 3x4 Redwood, Western Cedars,3 Ponderosa Pine, Red Pine 2x4 or 5/4 2x10 or 3x4 1. Assumes 300 lb concentrated load, L/288 deflection limit, No. 2 stress grade, and wet service conditions. 2. Incising assumed for Douglas fir -larch, hem -fir, and spruce - pine -fir. 3. Design values based on northern species with no incising assumed. American Wood Council e e r STAIR HANDRAIL REQUIREMENTS All stairs with 4 or more risers shall have a handrail on at least one side (see Figure 32A) [R311.7.8]. The handrail height measured vertically from the sloped plane adjoining the tread nosing shall be not less than 34 inches and not more than 38 inches (see Figure 3 0) [R311.7.8.1]. Handrails shall be graspable and shall be composed of decay -resistant and/or corrosion resistant material. Handrails shall be Type I, Type II, or provide equivalent graspability (see Figure 32B). Type I shall have a perimeter dimension of at least 4" and not greater than 6-1/4". Type II rails with a perimeter greater than 6-1/4" shall provide a graspable finger recess area on both sides of the profile [R311.7.8.3]. All shapes shall have a smooth surface with no sharp corners. Handrails shall run continuously from a point directly over the lowest riser to a point directly over the highest riser and shall return to the guard at each end (see Figure 33). Handrails maybe interrupted by guard posts at a turn in the stair [R311.7.8.2]. Figure 32A. Handrail Mounting Examples. Fasten handrails per manufacturer recommendations waU • guard post Mi3UNTED To GUARD MOUNTED Tt3 WALL FigureHandrail Grip Size. a �IOR�IRc�.lL.AR �1RcUlAR Perlmeteri �at — � 4" tck;ng �"-38" to nosing � stairs, typical ion -resistant ail hardware STAIR FOOTING RE U M IREENTS (R403 Where the stairway meets grade, attach the stringers to the stair guard posts as shown in Figure 34. Posts shall bear on footings. All footings shall bear on solid ground and shall be placed at least 12 inches below the undisturbed ground surface or below the frost line, whichever is deeper (see Figure 34). Stringers shall bear on a 2x4 bearing block attached to the post as shown. Stringers shall not bear on new or existing concrete pads or patios that are not founded below this depth. When guards are not required (see GUARD REQUIREMENTS), posts may terminate below the bottom tread elevation. Bolts are only required if a guard post is required. TAIR LIGHTING REOUIREMENTS �R303. Stairways shall have a light source located at the top landing such that all stairs and landings are illuminated. The light switch shall be operated from inside the house. However, motion detected or timed switches are acceptable. Figure 33. Miscellaneous Stair Requirements. handrail ��" min. stair Width Figure 34. Stair Footing Detail. cut post at bottom tread elevation when no stair ward is required MISt' � t min. stair M CO stringer 4 RECESSED post . . [R31 1.7,7.3 Type 1I] ---- Perimeter: >6�►�' section square or 12" dia. footing handrail shall return at each end (2)���" diameter through -bolts with washers required only if ward is required; otherwise use �2) #8 wood screws >_�-�/z" long or (2) 16d threaded nails Attach 2A bearing black using wood screws >_3-%" long or �8) '16d threaded nails minimum frost depth American Wood Council :a �� ,. �. � -ate, � � �-���= �+���t�. `jet .-�� :�� 1� �� .�,A �'�. _� �. �,. -� _ � �� yam, � iT�i'i'i T' � �� .� �'�,I11� �� .. ,r �- r ':a �A �.� {� a ..- , �- . ��� � +� . ice, � �� . � �3 -�� ,.: �� � �� : - .� �- -'al"��a�-yp :+� � � "E�s���� � ai � Tilsit � v� � � r�—lam pl�k �! i[f A� F�lyd � e�I�aii � I —is ry �' �, m F.. �" - •� 5 ice. ;��� ���� � :r:r�-1. - _ �� - ,�_ �� �� w. r -� � a� -��i �- ., k ,:: c ��6 �:, :!��:l =: Frei = �� � � i , � = ��-� rn��cimu �, �i�fi a -�h z � �F s.`� �.�.� �t Ct`IITi(T1�' �'� � N_ trif� ,_ �i�`� �� I� 3 i' k ,. v ,- ,� �-.-. _. .;� - � ._ �� a _ ._ _� � �: r -- � �: �� -, � ? � - z ! 'a � �? �, ; , ��h i� ���� �. - �Y E:'�� �- - �' YI is - - � . �� ., ��� , � �H ,;, �. ` �_. -a 4 iA µ` 3- . { z � � s � _. �� � lam{ � i � �- J i i � i s '�9 9, D u k t T � ,1 , � _ _ _--_- --_ _e-_ .,�._ -�_ __- � _ ._ __ _.. �r�'� ! �_� .Ti � r ... Wit' ., � ,. _�. Q,y IhITEFN,4iICNAL C�QE COIINCI e rm. O s OA �v n oni ., n adequ �u eer` isi:his on; of c r� s dory . � �Ie every e rt , bei.2nmade fris re tie ie accuracy of the : i n r r-� , dhe American Wo a itand its errIbrewars, d not assume r . o ns,Ni i for errors or onissi.a s in the document, nor nx esVns,. an-s, :r construction, Ire ar from ft. Those using s cu ; nt assume aR. �a i an-sinuse. Arrsenaan Wood Couricil' This document has been modified from the original to incorporate the Washington State Building Code Council load tables fora 601b live load at decks, published in State Building Code Interpretation No. 1641. FASTE NMASTE R TE C H N I CAI BULLET[ N =� ot: r*— , V CONNECTION DETAILS Jot The LedgerLOK Ledger Board Fastener has been designed specifically for attaching the deck ledger to a rim joist or band board of the house In a :.. ` code compliant manner. When installed as instructed in this bulletin, the Led9erLOK can be used to replace the 1 /2" Lag Screws called for in Table 502.2.2.1 of the 2009 International Residential Code URC) or Table 507.2 of the 2012 and 2015 IRC. je got In addition, the proprietary coating on this fastener exceeds the corrosion - - j LedgerLOICe a roved hot-d� ed alvanized coat n s. protection provided by cod pp pp g 9 a -wit 11 „1 111, M ® Choose M 8`I or 5" LedgerLOK so that The proprietary galvanized and polymer coating applied to the threads fully engage the rim material and LedgerLOK has been tested under the current [CC standard for fastener tip extends beyond the inside face of evaluating corrosion resistance in treated lumber (AC257) and the rim joist. deemed suitable alternative to code -approved hot dipped galvanized Use a hi h torque, 1 2" variable speed drill coatings when exposed to ground contact ACQ preservative (I if cordless). treatment in wet use conditions. A statement of this compliance .. can be found in the ICC Evaluation Report for LedgerLOK (ESR Follow the minimum spacing and fastening tenMaster website. patterns from Figure 1 and Table 1. #107�), available online at lcc�es_org or the Fas Install fasteners through the ledge r and For applications within 1,000 feet of saltwater, we recommend the shg l eathin . Continue into the rim joist until the use of a stainless steel fastener. washer head is drawn firm and flush to the ledger board_ Do not overdrive. Fasteners should be staggered in a "v" pattern and spaced as follows: A. Minimum end distance = 3"3/4" B. Minimum edge distance = l-3/4" C. On -center spacing =Per Table 1 7 E Fffeci�ve April �,�4 � T. Please reference our website to ensure fihat you are using fihe most up to date version. 153 BOWIES ROAD, AGAWAM; MA 01001 � 4T3.7890252 � 800.518.3569 I WWW:FASTENMASTER_tOM n r � 'b � �Y g �b e r FASTENMASTER TECHNICAL BULLETIN Determine the proper spacing of LedgerLOK fasteners from Table 1 below based on: • Live load requirement for your local code • Rim material thafi you are attaching fio • Ledger material being attached fio the house • �oisfi span as measured from the Ledger to the first supporting beam TABLE 1: Fas#erring pa#tern for attcxchmen# of hedger #o ri.m board using LedgerL��C LedgerLOK fastening patterns outlined in finis table provide equal or better performance to lag screw patterns in fine 2009, 2012 and 20151RC in accordance with 1RC secfions R104.11 and in accordance with generally accepted engineering practice. Design values used to create these potterns were derived from individual fastener testing under [CC Accepfiance Criteria AC233 (ESR #1078) ❑s well as fu([ system testing directly comparing lag screw and LedgerLOK performance in ledger fio rim connections using generally accepted industry standards used to generate the 1RC fastener spacing tables for lag screws. • Ledger materials must be ❑minimum of 2 x 8 nominal dimensional pressure -preservative -treated No. 2 lumber from any of the following species: Hem -Fir, SPF, Douglas Fir or Southern Pine. • Rim joist materials must be either solid sawn 2x lumber or engineered wood specifically designafied by the manufacturer as rim material_ 2x lumber may be of any species greater than 0.�2 specific gravity, including SPF, NF or DF Engineered Woad {EUII) Rim may be OMB, LSL ar LVL material measuring 1 " or greater in thickness. • Shearing of 15/32" or 7/1 b" OSB may separate the ledger and rim but must be attached per code. For additional materials befiween ledger and rim, please refer to fine guidelines below. Wet service conditions have been tested for and applied to the patterns above. No further reductions for wet service need to be applied. The code-standaral dead load for building materials of 7 0 pounds per square faofi is assumed in all calculations above. As required by 1RC Section 507.2.1, the calculations and instal[afiion instructions found in this bullefin have been reviewed and found to be in accordance with accepted engineering practices. For a copy of the engineer stamped/sealed letter or further technical information to support this bulletin, please contact FastenAllaster at 800-518-3569. l • The LedgerLOK is not designed for attachment to masonry/concrete maximum distance between fine inner face of fine ledger board and or over stucco, siding, rigid foam insulation or brick veneer. the outer face of the rim joist is no greater fihan 1 "and is properly • Connections and joints shall be properly flashed to prevent water from fastened to the rim. contacting the rim joist_ •Under the following conditions, fine LedgerLOK may still be approved i Where a positive connection to the rim joist cannofi be verified through but a design professional should be consulted for proper spacing inspection, decks shall be self supporting. requirements: • Ledgers should not be attached over cantilevered portions of the l . In areas where live load requ'tremsnts exceed 60 psf house where fine rim is unsupported by a foundafiion. or snow load requirements exceed 70 psf, ® For led ers being attached to open web floor firusses, consult 2. For decks designed to carry increased dead loads 9 "Afitachment of Residential Deck ledger to Metal Plate Connected Cex: hot tubs, stafiionary planters). Wood Truss Floor System" published 6y the Structural Building 8. Three season or fully enclosed decks supporting an Component Association for proper design methods. This Technical Note overhead roof_ can be found at www.sbcindustry.com. •All local code requirements as well as guidelines set forth in this • Wood sfirucfiural panel sheathing or gypsum board sheothing not technical bulletin must 6e followed for patterns outlined above to exceeding 1 " in thickness shall be permitted provided that fine be applicable. �� FastenMQsfier® and LedgerLOK®are firademark$ of OMG, [nc. copyright ©2017 flMG, Inc. All righfis reserved.