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I II II •I ze- `" Le $ i , b GA • v Iips I E ` g CO r II71 r . ?- I :°--- , $$ N C 1 n-----�r-'-,1 -- r ri N 4 �' IQcc! we *4 il in n ++ r rn N / � ;� i G 3 01" 4/ e r p =°toc i 1 715 o a� — � � ass o °' m __ U N eVc; ¢Q 6E a- r *AP tati cz ri QS .t i-1�+c�o 1 WI_ JW41011.w041'0 i ptvwid VC rom+drnv s�h eowro ,a+ �ir� ►.i O • i i:4 'C 0 P. cr1 RECEIVED MAY 2 2022 CITY OF TIGARD 6 \ BUILDING DIVISION (..---...- 1 111 kil Al ry' VAIN71:11 . I 6 1II I MI �•y �/� 1M h'4 tie r ��i ��E�■ �� • is 1 alliSMIIIIIIIIP 1106. V aD L was_.. , -‘% Q t� • 1 1 1,,,i i'.,;ii ii•4.'i:I.' .40 ' . i 1 .4010101 Ili Ip� s ' � b II . g f! i .{,t g� 1t X Aiiii c. 41 .4 , 1 . ibh. „....�--'..r , re v 144001 , F. fli°1"1.1"r- 0 :: I , t,,,, .1 It t ' Al , . lit- 12 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE '``s1 Table 4. Post Height for 6x65 and Footing Sizes for all Posts. Post Heights' Footing Sizes' ` m V 2 v d d,,, C to n C i . G LL C 4) Cl N "" 7"; C 15 u+ a2 = ia{. ,-3 in G1 u_ *� a s0. to . d 4 C 13 i f2 F- co m -Oj fn C) W V 'p 3 = ca ' 'a G1 O o Cl oo. � ix oo 5.10' 14' 14' 14' 14' 14' 18" 16"x16" 7" 6' 514' 14' 14' 14' 14' 14' 21" 18"x18" 8" 518' 14' 14' 12' 14' 11' 24" 21"x21" 10" to510' 14' 14' 14' 14' 14' 20" 18"x18" 8" 514' 14' 14' 14' 14' 11' 24" 21"x21" 10- 518' 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" I 11" 518' 12' 11' 8' 11' 2' 31" 27"x27" I 13" 510' 14' 14' 12' 14' 10' 25" 22"x22" 10" 12' 5.14' 13' 12' 9' 11' 5' 30" 26"x26" 13" 5.18' 11' 9' 6' 9' 2' 34" 30"x30" 15" <_10' 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' NP 37" 33"x33" 16" 510' 13' 12' 10' 12' 6' 29" 26"x26" 12" 16' 5.14' 10' 9' 5' 9' 2' 35" 31"x31" 15" 518' 7' 5' 2' 7' NP 40" 35"x35" 18" 510' 12' 11' 8' 11' 2' 31" 27"x27" 13" 18' 514' 9' 8' 2' 8' NP 37" 33"x33" 16" 518' 5' 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.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. 5.8x8 nominal posts may be substituted anywhere in Table 4 to a maximum height of 14'. R'D 6+C r� Usk C r't,' rn am t2, Xt(6 ( € siJ --e..._ oR Z D ri (001 g « _l' �k_ Frzi- j + S l-z- I eN-4-0,(— American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 13 ''= 12. Typical Footing Options. N. s,, Cut ends of posts posts must be shall be field treated ,1' .__A,._.._ with an approved t �4 centered on footing ---ix, preservative(such as copper — ) 'diameter .._._ ' pre-manufactured naphthenate) rod post base t with post anchor about 1� -�= .�• 1 gm , • ♦ei • 0 12"diameter •� ! a 12" conc.s em 4"min. ° min. .r 'd♦ . . . • 4 .Y _..t I.L e - t a: _� A '. .. • & _ ° . , Table 4 e,♦ ,t, : g" ♦ ^n frost depth —;-1 per Table 4 -r--+- per Table 4 1--,— per Table 4 4"min. { per Table 4 A footings must bear gravel on undisturbed soil LEDGER ATTACHMENT REQUIREMENTS 13A). Many new homes constructed with wood I-joists (R5071 include 1"or thicker laminated veneer lumber(LVLas GENERAL:Attach the ledger board,which shall be band joists(or rim joists)that can support the attachment equal to or greater than the deck joist depth but less than of a deck(see Figure 14).However,some older homes or equal to the house band or rim joist depth,to the might be constructed with band boards that are too thin house in accordance with Figures 14 and 15.The ledger (less than 1")to support a deck. In such cases, a non- shall be a minimum nominal 2x8. When attachments are ledger deck or a full plan submission is required. made to the house band joist,the band joist shall be MANUFACTURED WOOD TRUSS: A metal plate capable of supporting the new deck. If this cannot be verified or conditions at the house differ from the details connected wood truss(MPCWT)is an engineered, prefabricated structural component designed for each herein,then either a non-ledger deck or full plan submission is required. See NON-LEDGER DECKS. specific application. MPCWT's used in residential floors are often installed with a 2x4 lumber"ribbon"at the SIDING AND FLASHING:House siding or the ends of the trusses(see Figure 13B)to tie the ends of the exterior finish system must be removed prior to trusses together.The ribbon board,by itself, is not installation of the ledger board.Approved corrosion intended to support the deck ledger and deck. Installing resistant flashing is required at any ledger board residential decks when the floor system for the house connection to a wall of wood framed construction(see uses MPCWT requires a standard detail provided by the MINIMUM REQUIREMENTS). See Figure 14 for truss designer, a non-ledger deck, or a full plan continuous flashing with drip edge. The threshold shall submission. Refer to the Technical Note-Attachment of be carefully flashed and caulked to prevent water Residential Deck Ledger to Metal Plate Connected intrusion due to splash from the deck or melting snow Wood Truss Floor System for special blocking details and ice. and attachment requirements(www.sbcindustry.com). MANUFACTURED WOOD I-JOIST: The term"I- Joist"denotes manufactured wood"I"joists(see Figure American Wood Council CORROSION-RESISTANT / a M . FLASHING INSTALLED IN ` �� 0 DECK JOIST PER 1 n - E 8 . SHINGLE-FASHION FOR DETAIL 1/S07,TYP E + 't WATER TIGHTNESS .��r _�re WHERE DECK MEETS '�' APPROVED JOIST TO " �' EXTERIOR WALLOft/ '��` BEAM CONNECTOR r M 1 [R703.4] ••r+- 1 li �/. (R507.7) a - RI HOLD-DOWN DEVICES = �� t,`' WITH MIN 750 LB. BEAM PLIES SHALL BE CAPACITY AT 4 S FASTENED WITH(2) 49. LOCATIONS,EVENLY ROWS OF 100 NAILS DISTRIBUTED ALONG �� MIN AT 16"O.C.ALONG ?:?isi „.........._.__.....:--- DECK AND ONE WITHIN 24" EACH EDGE(R507.6] OF EACH DEVICE OF THE - _✓_.-__.__.__ �, C DECK BEAM PER LEDGER. SHALL BE INSTALLED IN ="= - - DETAIL 1/S09 :; ACCORDANCE WITH Y .3. MANUFACTURER'S APPROVED BEAM TO („i) � - ''y, RECOMMENDATIONS _�-------- POST CONNECTOR ,...... ....„1, (R507.2.4].SEE DETAIL -" [R507.7.1).SEE DETAIL § W 2/SO6 FOR ALTERNATE — — '�� -�.M�l - 3/SO6 FOR ALTERNATE CONNECTION y "--' CONNECTION cc wU i + El DECK 21S07 DECK JOIST PER lj I � ©DECK POST PER z = CO DETAIL 2/509 g MkLateral load connection 2 Joist to beam and beam to post connection ® Q. SO4 NTS SO4 NTS ; IX N m D DECK POST PER !/ 0 LATERAL LOAD CONNECTION PER DETAIL NAIL 2/S09 LU 11SO4 OR 2/S06 APPROVED POST TO it 1 t FOOTING CONNECTOR CL z FLASHING BETWEEN DECK INSTALLED IN �' AND EXTERIOR WALL PER /[ ACCORDANCE WITH DETAIL 11SO4 (_ INSTALLED INSTRUCTIONS -ii /icy ;. J ©DECK LEDGER FINISH f ,` W IR507.8.1J FASTENING PER DETAILS GRADE V ® STAGGERED AS SHOWN 1508 AND 2/508, t!J EFFECTIVE •..., �,�, �' MARCH.2016 o a nu _ APPROVED JOIST HANGER II It._,.,,_ v z N X x WITH DEPTH NOT LESS REVISIONS NO. DATE M Q THAN 60%OF JOIST DEPTH w O ct rt. O p [R507,7 AND R507.5.1] z 0 fil LEDGER a'c- 1-w w FASTENER g z 2 F0DECK LEDGER(2x6 00 Y z SPACING PER 4 —MINIMUM)PER DETAIL U - NOTE:SEE DETAIL DETAIL1/S08 `� 1/S12 EQUAL TO OR ©H O 4/S06 FOR •14`4 LC n GREATER THAN THE DECK LL --___,_ _.---- ALTERNATE POST Details JOIST DEPTH Ar Q FOOTING SIZE TO FOOTING f PER 1/S10 CONNECTIONS 3 Ledger connection 4 Post to footing connection SO4 NTS SO4 NTS SO4 LEDGER CONNECTION TO BAND JOIST' E JOIST SPAN(ft.),L,, 6 CONNECTION DETAILS m <6 <8 < 10 512 514 < 16 < 18 $ ON-CENTER SPACING OF FASTENERS(in.) 1/2-inch diameter lag screw with 1/2- 30 23 18 15 13 11 10 inch maximum sheathing 1/2-inch diameter through bolt with 1/2- 36 36 34 29 24 21 19 inch maximum sheathing' 1/2-inch diameter through bolt with 1- Y inch maximum sheathings 36 36 29 24 21 18 16 a.Ledgers shall be flashed with approved corrosion-resistant flashing applied shingle-fashion in a manner to prevent entry of water into the wall cavity or g Cie) penetration of water to the building structural framing components in accordance with Section R703.4. b.The tip of the lag screw shall fully extend beyond the inside face of the band joist. c.Sheathing shall be wood structural panel or solid sawn lumber. d.Sheathing shall be permitted to be wood structural panel,gypsum board,fiberboard,lumber,or foam sheathing.Up to 1/2-inch thickness of stacked a. washers shall be permitted to substitute for up to 1/2-inch of allowable sheathing thickness where combined with wood structural panel or lumber sheathing. Z /a. 1- o A 1 Minimum Ledger Connection Table(from 2017 ORSC Table R507.2) ft— Q SO8 NTS mre N } ids PLACEMENT OF LAG SCREWS AND THROUGH BOLTS IN LEDGERS AND BAND JOISTS MINIMUM END AND EDGE DISTANCES AND SPACING BETWEEN ROWS(in.) - EFFECTIVE TOP EDGE BOTTOM EDGE CUT ENDS ROW SPACING rnaNcn,2018 RE LEDGERa 2d 3/4 2° 1 518b NO. VISlODATE BAND JOIST 3/4 2 2b 1 5f8b a.Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with detail 3/SO4. b.Maximum of 5 inches. e.For engineered rim joists,the manufacturer's recommendations shall govern. d.The minimum distance from bottom row of lag screws or bolts to the top edge of the ledger shall be in accordance with detail 3/SO4. Tables 2 Ledger Fasteners Placement Table(from 2017 ORSC Table R507.2.1) S08 NTS SO8 .4 I. - W. '*1 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 19 ARD REQUIREMENTS construction when approved by the authority having ' ‘'" jurisdiction. it decks greater than 30" above grade are required to Jaye a guard [R312.1] -one example is shown in Figure 24. Other methods and materials may be used for guard Figure 24. Example Guard Detail. 2x2 baluster,typical 4x4 post,typical 2x6 or 5/4 board rail cap:attach to guard post with DO NOT NOTCH �6'-0"maximum spacing (3)#12 by 3"long screws or(3) 16d threaded nails with 0.148"nominal diameter 11 I:i•:U■"■ iii � 1 36° minimum 2x4 top and bottom; attach to guard post with (2)8d threaded nails or NA 11:1111 Illh EL III 111.11111 I Vl (2)#8 wood screws z2-'/z" .._ __ Illl 1♦ long on inside face IIl}A 1:■ -- minimumnominal2x8 rim or outside joist (2)1/2"diameter , openings shall not allow attach balusters at top and bottom through-bolts the passage of a 4" with(1)#8 wood screw or(2)8d and washers diameter sphere post-frame threaded nails with 0.135"nominal diameter GUARD POST ATTACHMENTS FOR REQUIRED Figure 25. Guard posts for required guards that run GUARDS perpendicular to the deck joists shall be attached to the Deck guard posts for required guards shall be a rim joist in accordance with Figure 26. Only hold-down minimum 4x4 (nominal)with an adjusted bending anchor models meeting these minimum requirements shall be used. Hold-down anchors shall have a minimum design value not less than 1,100 psi. Joists and rim joists allowable tension load of 1,800 pounds for a 36" to which guard posts are attached shall be a minimum of maximum guard height and be installed in accordance 2x8 (nominal). with the manufacturer's instructions. Guard posts for required guards which run parallel to the deck joists shall be attached to the outside joist per Figure 25. Guard Post to Outside-Joist Example. ��.oi see FIGURE 24 for guard *guard posts can be installed as is component attachment shown in Figure 26 (between joists) guard posts may be requirements if blocking is installed as shown below located on either side within 12"of each side of the post of the outside-joist i at first interior bay, provide 2x blocking at guard posts guard post with hold-down anchors; attach blocking with 10d threaded nails top and bottom, each side i? (2)1/2"dia.through- `� outside-joist bolts and washers - min. 2x8(nom.) lit'111110111111111111/ Alternate attachment of hold-down • 2" min. 1air anchors to framing members2-1/2"min. and 5" max. possible per manufacturer's 2., min. Aa instructions. guard post* outside joist SECTION PLAN VIEW min. 2x8(nom.) American Wood Council " . .,„ I! •' DO ' r ...J., °04*.7...', sirs-,r...-0("4.,'.' .,.,, ..:,',:),,.,,''..,,,,;-'', w iogir,":44*"'''- , - . j{ �s� 1 t Fs imil ii .I +tR"" }P 4 1. f _ ++x li ftl: E:' Cri) 1 )d,.,y- ...... . (11:14) ' , E.? if i ;si`is ° il fIfl } . i .10 tc'' ra . IL i,, :. ., ,,....0,4102.....: . . ......... _ .. ..... . . .___ _ ,, . 1 !i, ,..„,,,, ,, , ,. ;,.11::.,:,, ........i,,, : ._,........i.„, ,. , ...„,„...oinittlil"„. .„,;,,.,..t..: ,__ . _ .........,.. ., ....“..... L. ,,,, ., . ...,, - , .,,. . ., , ... , :„. ,. .,,, , , , .,,s,„, . , .., . , , .. ,i„ , _ ., ,, s . ., . ., . . ,: r mi. ,. —,-- ..,,,,, .,, , . . !atii,ti}ii> >f ,.14 --"°,,, i (� .. ►.n do ',.,- , ' w1111r1� T. o c N f T 10 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE ii l POST REQUIREMENTS Figure 8B. Alternate Approved Post-to-Bea�1,, All deck post sizes shall be 6x6(nominal)or larger, and Post Cap Attachment. ' the maximum height shall be in accordance with Table 4 ---_ Solid sawn or ,e and measured from grade or top of foundation, -------- �:_muhi-pybeam whichever is highest,to the underside of the beam. �"`�� " �`�~ - Under prescriptive limits of this document, 8x8 nominal �"' �lt��, posts can be substituted anywhere in Table 4 but are il;ili limited to a maximum height of 14'-0". Posts shall be 11 I centered on footings. Cut ends and notches of posts shall ,.•... be field treated with an approved preservative(such as 9 '/1 `-'' copper naphthenate) [R402.1.2]. The beam shall be �° 0 I I/1} 6x6 min. attached to the post by notching as shown in Figure 8A pose ��''''� ;o = or by providing an approved post cap to connect the I 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). Figure 9. Prohibited Post-to-Beam Attachment Condition. 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 . � �>>4� Through-bats, Note:Support of beams w/ may be omitted at the beam and posts adjacent to the 4.----;911111r, o lag screws,or fasteners only is prohibited. house. nails. Beariiinn 8A required.See Figure 8A. Post-to-Beam Attachment _n4,_ _ Requirements. (2)i'2"diameter single 3"or 4" / through-bolts with washers nominal or double 2"nominal beam yyi; �r4� a2 •beam must Ilr. � 55" Figure 10. Diagonal Bracing. bear fully on r notched 6x6 __^__^ - 6x6 min. • —� + beam v 2' I 6 I _a: ' I I W 2x4,typical (1)1/2"diameter-' o " ►- lag screw with IT /a" ni washers,typical CD Typical Post At Splice DIAGONAL BRACING PARALLEL TO BEAM Note: Diagonal Bracing is prohibited on center posts. American Wood Council