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JI o r_.,.j-r 1:, . 44'1 1,4 (1 C _y. �"f 9:1) 1 8 4 t*:-14. : ,T1 ems , /NFER •PRESCRIPTIVE RESIDENTIAL WOOD.DECK CONSTRUCTION GUIDE 9 JOIST-TO-BEAM CONNECTION must have a minimum capacity of 100 lbs in both uplift Each joist shall be attached to the beam as shown in and lateral load directions.Joists may also attach to the Figure 6.Joists may bear on and overhang past the beam side of the beam with joist hangers per Option 3.Joists face the lesser of Lo or L/4 when Option 1 or Option 2 is shall not frame in from opposite sides of the same beam. used to attach the joist to the beam and blocking is See JOIST HANGERS for more information. Hangers, provided between joists at beam bearing.Mechanical clips,and mechanical fasteners shall be galvanized or fasteners or hurricane clips used,as shown in Option 2, stainless steel(see MINIMUM REQUIREMENTS). Figure 6.Joist-to-Beam Detail. 3-8d threaded OPTION 1 OPTION 2* OPTION 3* toe nails mechanical (2 on one side, , fastener or ITDist top of beam or 1 on the other) ' hurricane clip _ ledger and joist �l hanger must be at same ' A M elevation AN4 beam �� L11 *see manufacturer's recommendations for additional requirements JOIST BANGERS Figure 7. Typical Joist Hangers. Joist hangers,as shown in Figure 7, shall have a depth of joist hanger with inside flanges at least 60%of ledger or beam depth.Each hanger shall have a minimum vertical capacity in accordance with Table 3A.The joist hanger shall be selected from an `" =-- approved manufacturer's product data based on the -.,. - ,,.. � dimensions of the joist or header it is carrying.Joist !III hangers and fasteners shall be corrosion resistant(see MINIMUM REQUIREMENTS).Use joist hangers with inside flanges when clearances tothe edge of the beam or ledger board dictate.Do not useclip angles or brackets to support joists. J - till Table 3A. Joist Hanger Vertical Capacity. Joist Size Minimum Ca acit , lbs 2x6 400 2x8 500 2x10 600 2x12 700 American Wood Council . 10 - .PRESCRIPTIVE RESIDENTIAL-WOOD DECK CONSTRUCTION GUIDE tEOST REOUIREMENTS..,<;-1 —` `� r FigureA8B Alternate:9pproverd Post-to-Beall All deck post sizes shall be 6x6(nominal)or larger,and Post Cap==Attachrnent the maximum height shall be in accordance with Table 4 and measured from grade or top of foundation `-- _ Solid ptyb beam ..._-.�.�__-__- -- �- -- ----•_.._muiti•p!y beam whichever is highest,to the underside of the beam. --`--- =�= -...,-- :--~-•.•- Under prescriptive limits of this document, 8x8 nominal _._` _ 1;` posts can be substituted anywhere in Table 4 but are !41l.1 limited to a maximum height of 14'-0".Posts shall be . i\ • �' centered on footings. Cut ends and notches of posts shall • be field treated with an approved preservative(such as o\ .f 4 copper naphthenate) [R402.1.2]. The beam shall be o tt Ir,I, �t attached to the post by notching as shown in Figure 8A po6 min. , I+,i ,� or by providing an approved post cap to connect the 0 i beam and post as shown in Figure 8B.All 3-ply beams 0 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 r notching is prohibited(see Figure 9). A figure 9 Prohtblted Post to.Beam Attachment; •`. ?Condition �"'".-' ovide diagonal bracmgparallel to tlfe beam.at each.. Corner postgreater tliai2' 0"uiheight.as shown in•: rFigure 1.0-Diag liEbiacmg is_prohibited on center.A; ,-posts Bracmg;shatl be"fastened to the10st atone end_j -a dd the be iii4nheother With'W diameter lag screws. rippiP,r For non-ledger decks, (see Figure 21)diagonal bracing maybe omitted at the beam andposts to thescrews, . Note:Support Is beams ed adjacentws,or fasteners only Is prohibited. house. Bearing is required.See Figure BA.__Figure-8A::Post-to.tBeam-Attachment iRequirementC (2)h"diameter single 3"or 4" i through=bolts nominal or double with washers 2"nominal beam ,v.Vri411111111 " `q�J s6 ___-._____---__-._Figure-10,--Diagonal-Bracing,. ----.___— beam must ^..Illlllm; �/A" bear fully on notched 6x6 - 6x6 min. )s:2 3,21 - `` L beam y ' I p I151 G) to 2x4,typical (1)112"diameter) lag screw with ill NI za�A" co washers,typical Typical Post At Splice ( .ti G NAt_.BRACING•: ARAtLEL TOBEAM` Note:Diagonal Bracing is prohibited on center posts. American Wood Council .PRESCRIPTIVE RESIDENTIAL=WOOD.DECK CONSTRUCTION GUIDE 19 GUARD REQUIREMENTS construction when approved by the authority having All decks greater than 30" above grade are required to jurisdiction. have 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 1-•4-6'-0"maximum spacing -- �(3)#12 by 3"long screws or(3)16d threaded nails with 0.148"nominal diameter °Il I:UM WIIIEIM ■I36° 2x4 top and bottom; minimumattach to guard post with (2)8d threaded nails or ®1 1 h111111IINI (2)#8 wood screws e2-'/z' - long on inside face I, ii:p :■". minimum nominal 2x8 -ms,® ° 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 design value not less than 1,100 psi.Joists and rim joists shall be used.Hold-down anchors shall have a minimum to which guard posts are attached shall be a minimum of allowable tension load of 1,800 pounds for a 36" 2x8 (nominal). maximum guard height and be installed in accordance 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. ►�� see FIGURE 24 for guard *guard posts can be installed as 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 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 (2)1/2"dia.through- outside-joist—.— bolts and washers min.2x8(nom.) ismossim Alternate attachment of hold-down 2"min. anchors to framing.members llti� � 2-1/2"min.and 5"max. � possible per manufacturer's �� instructions. 2"min. guard post' outside joist SECTION PLAN VIEW min.2x8(nom.) American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 21 Figure 28. Stair Stringer Requirements. 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 Z2-1/2"long 3x_treads-(2)16d threaded nails or(2)#8 screws a3-112"long stringer treads:2x_or 5/4 board . treads:see Table 6 V so ire" 36"max 7 2x4 ledger,each side,full depth of tread;attach with(4)10d threaded stringers nails or(4)#8 wood screws a3"long : : ;: :::::E: ax. panCUT STRINGER SOLID STRINGER • ER max.span=13'-3" SOLID STRINGER • Figure 30. Stair Guard Requirements. Figure 31. Stair Stringer Attachment Detail. 6'-0"maximum rim joist or between posts `I outside joist stair guard is required for stairs with a total rise of. 30"or more;see GUARD I REQUIREMENTS for . • iNNI more information ;i sloped joist hanger, minimum vertical capacity of 625 Ibs; r _see._JOIST.HANGERS_ �, for more requirements stair guard height:— 34"min.measured I `p ATTACHMENT WITH HANGERS from nosing of step L J r . - 0 Openings for required guards on the Triangular opening shall— Table 6.Minimum Tread Size for Cut and Solid sides of stair treads shall not allow not permit the passage Stringers.' a sphere 4-3/8"to pass through. of a 6"diameter sphere. Cut Solid Species Stringer Stringer Southern Pine 2x4 or 5/4 2x8 Douglas Fir Larch, Hem-Fir,SPF2 2x4 or 5/4 2x8 or 3x4 Redwood,Western Cedars, Ponderosa Pine,3 Red Pine3 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 22 PRESCRIPTIVE RESIDENTIAL WOOD.DECK CONSTRUCTION GUIDE • STAIR HANDRAIL REQUIREMENTS STAIR FOOTING REQUIREMENTS IR4031 All stairs with 4 or more risers shall have a handrail on Where the stairway meets grade,attach the stringers to at least one side(see Figure 32A) [R311.7.8].The the stair guard posts as shown in Figure 34.Posts shall handrail height measured vertically from the sloped bear on footings.All footings shall bear on solid ground plane adjoining the tread nosing shall be not less than 34 and shall be placed at least 12 inches below the inches and not more than 38 inches(see Figure 30) undisturbed ground surface or below the frost line, [R311.7.8.1].Handrails shall be graspable and shall be whichever is deeper(see Figure 34). Stringers shall bear composed of decay-resistant and/or corrosion resistant on a 2x4 bearing block attached to the post as shown. material.Handrails shall be Type I,Type II,or provide Stringers shall not bear on new or existing concrete pads equivalent graspability(see Figure 32B).Type I shall or patios that are not founded below this depth.When have a perimeter dimension of at least 4" and not greater guards are not required(see GUARD than 6-1/4".Type II rails with a perimeter greater than REQUIREMENTS),posts may terminate below the 6-1/4"shall provide a graspable finger recess area on both bottom tread elevation.Bolts are only required if a guard sides of the profile [R311.7.8.3].All shapes shall have a post is required: smooth surface with no sharp corners.Handrails shall STAIR LIGHTING REQUIREMENTS ER303.71 run continuously from a point directly over the lowest riser to a point directly over the highest riser and shall Stairways shall have a light source located at the top return to the guard at each end(see Figure 33).Handrails landing such that all stairs and landings are illuminated. may be interrupted by guard posts at a turn in the stair The light switch shall be operated from inside the house. [R311.7.8.2]. However,motion detected or timed switches are acceptable. Figure 32A. Handrail Mounting Examples. Figure 33. Miscellaneous Stair Requirements. Fasten handrails per manta tuner recommendations r�.�k ,- • •ry co C cell" 1Z"min. I I — — m e t — — .to'a C i1;min, handrail handrail shall \-2x blocking return at each 1x"min. I� 12"min.-+-1 (— end /.. l 34`-38"to nosing of stabs typical s 36'"min.stairwidth .-- —_.__._.-- — _ \-I� v-..- wall--• r corrasion•resistant I I I —postrd handrail hardware 1 1 1 1 1 I I I rl..l-t f-1_1-1 , 1 1 MOUNTED TO GUARD MOUNTED TO WALL t ' I. ' Figure 32B. Handrail Grip Size. Figure 34. Stair Footing Detail. 14._2" cut post at bottom tread (2)1/4'diameter through-bolts elevation when no stair with washers required only guard is required if guard is required;otherwise 1 4"' 2', � x use(2)#8 wood-screws a3'h" 24'max.re7) �_ 4• long or(2}16d threaded nails 1-7 1s' I E Ir Attach 2x4 bearing block using min. stair k (8)#8 wood screws a3'/:"long stringer �� or(8)16d threaded nails E >r E ■t� 4x4 .. NONCIRCULAR CIRCULAR RECESSED post 'c [R311.7.7.3 Type I] [R311.7.7.3 Type II] iii6 6" E Perimeter:4"-64" Perimeter:>64" minimum " fit\ t frost depth 10"x10"square or 12"dia.footing American Wood Council premiumACCESS S2020 tate Residential Code of New York First Printing:Nov 2019 CHAPTER 5 FLOORS EXTERIOR SHEATHING EXISTING STUD WALL'. EXISTING 2z BAND JOIST - OR ENGINEERED RIM BOARD minim 2"MIN_= 1 11 DECK JOIST 5 ti;AXNI Ma • a,un.. LAG SCREWS OR BOLTS ' 2"MIN. _ if� P'• O 3 0 FLOOR;FRAMING. O' a"c.• - o`-d JOIST HANGER .00 o-cP. '..o EXISTING o 0 FOUNDATION.WALL o p o` For SI: 1 inch = 25.4 mm. FIGURE R507.9.1.3(2) PLACEMENT OF LAG SCREWS AND BOLTS IN BAND JOISTS Copyright © ICC All Rights Reserved. Accessed by David Hatin on 07/22/2020 pursuant to License Agreement with ICC. No further reproduction or distribution authorized.Any Unauthorized reproduction or distribution is a violation of the federal copyright,and subject to civil and criminal penalties thereunder. t 2020 Residential Code of New York sou prenliu�nACCESS State First Printing:Nov 2019 CHAPTER 5 FLOORS SHEATHING NOTE:. SIDING .THIS DETAIL IS APPLICABLE 'WHERE FLOOR JOISTS ARE • -FLASHING FOR .PARAI:LELTO.DECKJOISTS. I WATER TIGHTNESS • DECKING APPROVED JOIST'HANGERS 2x LEDGER WITH-FASTENERS: 2"MIN: ■ �I�III � INACCO DANCE-WITH-TABLE R507.2 ii .HOLD-DOWN DEVICE MIN 750 LB_.CAPACITY •FLOOR JOISTS` MT‘ AT4 LOCATIONS,'.EVENLY,DISTRIBUTED. ALONG DECK'AND ONE WITHIN.24"OF EACH END OF THE LEDGER.HOLD-DOWN DEVICES SHALL FULLY.ENGAGE DECK JOIST PER' ' HOLD-DO W N.MAN U FACTU RER: A FULLY THREADED'!s'DIAMETER.LAG •- - SCREW-PREDRILLED W/MIN.3'PENETRATION TO CENTER O,F TOP PLATE,STUDS,.OR HEADER: For SI: 1 inch = 25.4 mm, 1 foot= 304.8 mm. FIGURE R507.9.2(2) DECK ATTACHMENT FOR LATERAL LOADS Copyright © ICC All Rights Reserved. Accessed by David Hatin on 07/22/2020 pursuant to License Agreement with ICC.No further reproduction or distribution authorized.:Any Unauthorized reproduction or distribution is a violation of the federal copyright,and subject to civil and criminal penalties thereunder.