|
Basic Decks Basic Decks Basic Decks
<br /> Deck Construction Notes Post to Beam Connection w/ Knee Brace Detail 1 — Ledger Attachment for Lateral Loads
<br /> • Please note that due to the new 60 psf loading, previous lumber spans and footing sizes have changed. (Knee braces are required on posts greater than 4 feet in height.) (Knee braces are required on posts greater than 4 feet in height.) z0
<br /> • The illustrations and information in this Tip Sheet may be used for decks whether or not they require a permit. See Tip Or 113 the height of the post;
<br /> Sheet 0 for when a permit is required. Beam splices must occur Hold-down orSheathing
<br /> whichever is greater #-'
<br /> • All wood must be pressure treated or naturally resistant to decay.Treat cuts, holes and notches with end-cut solution. over posts with 111ac rein.bearing tensiondevice Siding 0-
<br /> Corrosion.resistant; V
<br /> • Fasteners, hangers, nails, etc., must be stainless steel, hot-dipped galvanized, or as specifically required for the " ruin. 150t f# v
<br /> specified wood preservative used.The coating weights for zinc-coated fasteners to be in accordance with ASTM A metal column cap. / - Girder beam capacity Floor sheathing nailing Flashing
<br /> P at 6'o.c.(max)to joist
<br /> 153. Provide documentation in the field showingthe required fastenerprotection for the wood chosen foryour deck. Foilcrnr manufacturer" W
<br /> q withhold-dowel. CI
<br /> • You maymodifyanycomponents of this Sheet usingaccepted engineering practices.Anymodifications must be installation Instructions' `- -- Decking
<br /> P Tip P 9 9 P `,�, Flashiri ►��I W }-
<br /> reviewed prior to permit issuance. Al! attachments must be per manufacturer's installation instructions. JoistsIIII J ;,
<br /> • This Tip Sheet is intended to represent good construction practices for deck construction and related IRC ,r--.r- � -II"='S=�' Joist HangersMO 11 .II III _ .
<br /> requirements. See related Tip Sheets: 1 for stairs, 2 for handrails, and 3 for guards.
<br /> 1 � W
<br /> 1141 I Treated 2x ledger J 2"min. ~
<br /> "E 45° 4 K 4 knee brace u rt1 imorAri g �. I�1II�) Z
<br /> Typical Deck Section ,�l Aaiun ■
<br /> O5
<br /> 36"minimum High gdard ,
<br /> Existing biuildi+ withint'ermedtate ram � �-� CO 318"diarnetar thru-batt or 1t2" Deck Joist o" device _ }
<br /> Alternate Knee Brace Detail. ;; lag screws with washers,top&bottom FloarJ ist 750#capacity holddown devicill W
<br /> ;a can i at 4 locations evenlydistributed V
<br /> Flashing 4"in diameter cannot ! 2x4 knee brace face nailed ea.side of (tYP oaf) Floor joists
<br /> See detail 1i 4 l through (See Tip post and beam with'4-16d nails at each
<br /> +° Pressure treated along the deck and within 2 ft ofILI
<br /> d face and connection woodpost each end. Install per manufacturer
<br /> for ledger attachment Sheet 3), � See�tetAit 2 .: —�,,-- Q
<br /> option r.,a q for guardrail
<br /> `.. r. t connection
<br /> �. Decking Fully threaded 3/8"diameter lag W,,,. i ��. _ Option # screwpredrilled with a minimum of 3 in Option # 2
<br /> / sgu_ allusters Guardrail Attachment
<br /> r ,1 wtth tad wood (Required for New Construction) embedment into solid framing. (Existing Construction Only) X
<br /> '-` screw op&bottom (Guardrails are required when the deck is more than 30 inches above grade.)
<br /> "spacing 16" 4x4 min. post Z
<br /> recommended ©6'0"o.c.max.,Typ
<br /> . max A la"O.D.galvanized bolt
<br /> ter drainage, Knee braces are
<br /> Note required if distance or threaded rod w/
<br /> Contractor to fled veraiyr from grade to top of 'I' nuts&washers 2 min
<br /> `adequacy of solid lumber post exceeds 48". w..
<br /> for ledger connection. See detail on page 3, II
<br /> ;_�1 D@Ck COnneCtlOnS
<br /> ff an exit ore�ess from the' q — 2i4"min and 5"max �_���
<br /> existing b�rilding passe; —'• (All fasteners, nails, bolts, screws and connectors must be corrosion resistant:)
<br /> uthere nder
<br /> a existin the g tKr deck,or i€ 4 i4 a s min.wf 7--
<br /> 16' -- a
<br /> eaxlertlseproposed deevk, 8 0"max.height max mi
<br /> - tension device00# �+ . Connection: Fastening: 1"
<br /> 8'-8'minimum trance and 6x6 eLJt Ononustbemaintained:;Please' for81-0"to 1111141
<br /> I Manufactured Connectors Follow manufacturer's instructions
<br /> indicate openings in existing 10-a max.height ■�tar�
<br /> Wall etevati in+new. �� - All 5/a"O.D.rAlla. galvanized bolt Post to Footing Post base is required
<br /> or threaded rod wl 2x8 min. blocking
<br /> B ! nuts&washers Post to Footing (High Winds) Consult with jurisdiction about additional uplift loads where
<br /> ��_�� r 2"min wind exposure is greater then Risk Category B.
<br /> Manufactured post /
<br /> in. .
<br /> base with t"standoff. Post to Beam Connector is required
<br /> 2x8 min.deck 2"min / :��1i1;�►;0> t11; --1
<br /> " v ,ej Ledger to House FramingSee information on Sheet 5 and Sheet 6
<br /> 3,00[i psi concrete joists&rims 2�min and 5 max g
<br /> lino special 2"min j r®��������� Joist to Beam or Girder (3) 8d —Toe nailed
<br /> inspection rpcGlried)
<br /> Finished grade Note: Blocking or Bridging to Joist (2) 10d —Toe nailed @ each end
<br /> Use above details for guard connections or provide engineered Min. 1800#tension straps`
<br /> gear Wooden Deck Boards (2) 8d threaded nails OR (2) No. 8 screws
<br /> design that shows Guards can resist a single concentrated load _ p
<br /> I -11=H=[I-'. .._ �1 (r=11- (2) ea; Y,3" of 200 I„ applied in any direction at any point along the top and Section D Composite Decking Follow manufacturer's instructions
<br /> dear to bottom of
<br /> .-----ie�# '' " ,I�1 r�'r + r have attachment devices and supporting structure to transfer this
<br /> rr r^arr-^-rrQ^rr......c sc—� FEi�:+H!."'�j tooting, Footing
<br /> -.II<`_�ii� �l 11� — -:ll-� to bear b load to appropriate� structural elements of the building per IBC
<br /> I fi-It. ll l l .EI-=lt l l=ll undisturbed sec 1607,7.1.1
<br /> — 1—i—i,i 6'- _i-1— earth..-
<br /> .
<br /> Basic Decks sic ecks
<br /> co
<br /> HEADROOM,TREADS AND RISERS Cl
<br /> Placement of Laq Screws and Bolts in Ledgers and Band Joists co
<br /> 1.MAINTAIN A rv11N.OF 6'8"OF HEADROOM AT ALL TIMES
<br /> (Reference IRC Table 507.2.1)
<br /> Span Table and Footing Schedule for Decks 2.MAX RISE TOBE7.75"
<br /> Minimum End and Edge Distance and Spacing Between Rows Spans and footings assume the maximum 24"cantilever using Hem-Fir/Doug Fir No.2 or better framing lumber. 3.MIN TREAD TO BE 10",MAX TREAD TO BE 12" R. .,
<br /> TopEdge Bottom Edge Ends Row Spacing Table uses 70 p.s.f.loading(10 p.s.f.dead load+60 p.s.f live load)and 2000 p.s.f.soil bearing pressure.
<br /> 9 g HANDRAILS
<br /> b b Joist Max.Joist Girder Beam Size and Max.Span Between Support Posts/Footing Type 1
<br /> Ledgers 2 inches" 3/4 inch 2 inches 1 5/8 inches Joist Size Spacing Span 4x6 Footing 4x8 Footing 4x10 Footing 4x12 Footing 0 kr) }-
<br /> Band joistc 3/4 inch 2 inCheSe 2 incheSb 1 5/8 inchesb 1.HANDRAILS SHOULD NOT PROJECT MORE THAN 3.5"INTO THE0 12"o.c. 7'-5 5'-11" 14x14 7'-9" 16x16 9'-6" 18x18 11.-1" 18x18 REQUIRED STAIR WIDTH AND SHOULD HAVE A SPACE NOT LESS 0
<br /> For SI: 1 inch =25.4mm 2x6 16"o.c. 6'-9" 5'-11" 14x14 7'-9" 16x16 9'-6" 18x18 11r-1" 18x18 THAN 1.5°'BETWEEN THE WALL AND HANDRAIL
<br /> a. Lag screws or bolts must be staggered from the top and bottom along the horizontal run.See figure below. 24"o.c. 5'-9" 6'-3" 14x14 8'-9" 16x16 11'-0" 18x18 12'-10" 18x18
<br /> 2.THE HANDGRIP PORTION OF THE HANDRAIL SHOULD NOT BE LESS C� O.
<br /> b. Maximum 5 inches " " �' " THAN 1.5"OR MORE THAN 2"IN CROSS-SECTIONAL DIMENSION r /�
<br /> 12 o.c. 9-7 4-11 14x14 6-6 16x16 8-3 18x18 - 10'-0" 20x20
<br /> c.For engineered rim joists,the manufacturer's recommendations govern. 2x8 16"o.c. 8'-8" 4'-11" 14x14 6'-6 16x16 8'-3" 18x18 10.-0" 18x18 1 al �
<br /> 3.HANDRAILS SHOULD HAVE THIER ENDS RETURNED TO THE WALL OR
<br /> d.The minimum distance from the bottom row to the top edge of the ledger must be in addordance with figure below. 24" -o.c. 7 7 5'-11"
<br /> -14x14 7 9�� -16x16 9 6 1 8x1 8 11'-1" 18x18 TERMINATE INTO A NEWEL POST OR SAFTY TERMINAL
<br /> _
<br /> _
<br /> e.2 inches may be reduced to 3/4 inch when the band joist is directly supported by a munsill, header,or by double top wall plates. 12"o.c. 13'-3" 3'-6" 14x14 4'-8" 16x16 5'-11" 18x18 7'-2" 18x18
<br /> 2x10 16"o.c. 11-6" 4'-1" 14x14 5'-5" 16x16 6'-11" 18x18 8'-5 20x20
<br /> 24"o.c. 9'-5" 4'-11" 14x14 6'-6" 16x16 8'-3" 18x18 10'-0" 20x20
<br /> Placement of Laq Screws and Bolts in Ledgers-
<br /> 12"o.c. 15'-5" 3'-1" 14x14 4'-1" 16x16 5'-2" 16x16 6'-3" 18x18
<br /> (Reference IRC Figure 507.2.1(1)) ., ,' "
<br /> 2x12 16 o.c. 13'-4" 3-6 14x14 4-8 16x16 5-11 18x18 7-2„ 18x18
<br /> LAG SCREW OR BOLT STAGGER FASTENERS 24"o.c. 10'-11" 4'-1" 14x14 5'-5" 16x16 6'-11" 18x18 8'-5" 18x18
<br /> 1A1
<br /> / IN 2 ROWS Footings must have a minimum reinforcment of(2)#4 bars each way with a 3"clearance to the bottom of the footing. FLOOR JOIST AS
<br /> Note: Footing sizes are based on decks designed with single span joists where there is no center bearing beam. t PER PLAN
<br /> ® J 2.,MIN 5.5"MIN FOR 2X8
<br /> 6.5"MIN FOR 2X10 r
<br /> 5"MAX■ 7.5"MIN FOR 2X12 tr
<br /> Ell CN
<br /> III
<br /> 2"M 314"MItJ •
<br /> 2, b
<br /> Deck Ledger Connection to Band Joist
<br /> LEDGER (Reference IRC Table R507.2-Deck live load=60 psf,deck dead load= 10 psf,snow load 5 40 psf) tri j
<br /> *DISTANCE CAN BE REDUCED TO 4.5"IF LAG SCREWS For SI: 1 inch=25.4 mm, 1 foot=304.8 mm, 1poundper square foot=0.0479 kPa. m ,,'' aa
<br /> ARE USED OR IF BOLT SPACING IS REDUCED TO 4 ' LU
<br /> THAT OF LAG SCREWS TO ATTACH 2X8 LEDGERS TO Joist Span 2 X 12 STAIR STRINGERS 0 .(>
<br /> 2X8 BAND JOISTS. , V
<br /> Connection Details 6'and less 6'1"to 8' 8'1"to 10' 10'1"to 12' 12'1"to 14' 14'1"to 16' 16'1"to 18' > tS IS)
<br /> On-center spacing of fasteners I p
<br /> Placement of Laq Screws and Bolts in Ledgers r inch diameter lag screw with 22 16 13 11 9 8 7 o_ La (1) 0
<br /> 1
<br /> (Reference IRC Figure 507.2.1(2)) 1/2 inch maximum sheathing c,d /''
<br /> '/2 inch diameter bolt with' inch Z
<br /> EXTERIOR SHEATHING .,�` maximum sheathing° 30 22 18 15 13 11 10 0
<br /> EXISTING STUD WALL 111111 ' inch diameter bolt with 1 inch ' <(
<br /> 26 19 16 13 11 10 9
<br /> Existing 2x BAND JOIST ..- maximum sheathings 34"TO 38"MAX A-
<br /> �— —
<br /> •
<br /> OR ENGINEERING RIM ' •,�- a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist.
<br /> BOARD II- '=� b. Snow load shall not be assumed to act concurrently with live load.
<br /> 2"MIN WIN C. The tip of the lag screw shall fully extend beyond the inside face of the band joist. rif ., .
<br /> 148 DECK JOIST d. Sheathing shall be wood structural panel or solid sawn lumber. DATE .
<br /> n�� :
<br /> 5"MAX e. Sheathing shall be permitted to be wood structural panel, gypsum board,fiberboard, lumber or foam sheathing. Up I�
<br /> LAG SCREWS OR BOLTS to 1/2-inch thickness of stacked washers shall be permitted to substitute for up to %-inch of allowable sheathing •
<br /> 2 MIN 91 thickness where combined with wood structural panel or lumber sheathing.
<br /> • 7/30/2019
<br /> ••'tr.
<br /> •.. :$a .... JOIST HANGER
<br /> DETAIL AT STAIRS SCALE 1/2" = 1 '
<br /> SCALE:
<br /> 1/4" = 1 '
<br /> SHEET:
<br />
|