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{ A Basic Decks Basic Decks Placement of Lag Screws and Bolts in Ledgers and Band Joists (Reference iRC Table 507.2.1) Span Table and Footing Schedule for Decks 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. Table uses 70 psf.loading(10 psf,dead.load+60 psf live load)and 2000 psf.soil bearing pressure. Top Edge Bottom Edge Ends Row Spacing Girder Beam Size and Max.Span Between Support Posts I Footing Type Joist Size Joist Max.Joist Ledger a 2 inches d 3/4 inch 2 inches b 1 5/8 inches b Spacing Span 4x6 Footing 4x8 Footing 4x10 Footing 4x12 Footing Band joist C 3/4 inch 2 inches e 2 inches b 1 5/8 inches b 12"o.c. 7'-5" 5'-11" 14x14 7'-9" 16x16 9'-6" 18x18 11'-1" 18x18 For SI: 1 inch =25.4mm 2x6 16"o.c. 6'-9" 5'-11" 14x14 7'-9" 16x16 9'-6." 18x18 11'-1 18x18 a. Lag screws or bolts must be staggered from the top and bottom along the horizontal run.See figure below. 24"o.c, ',..S., 6'-3" 14x14 8'-9" 16x16 11'-0" 18x18 12`-10" 18x18 b. Maximum 5 inches. 12"o.c. 9'-7" 4'-11" 14x14 6'-6" 16x16 8'-3" 18x18 10'-0" 20x20 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 24"o.c. 7'-7" 5'-11" 14x14 7'-9" 16x16 9'-6" 18x18 11`-1" 18x18 d. The minimum distance from the bottom row to the top edge of the ledger must be in accordance with figure below. F e. 2 inches may be reduced to 3/4 inch when the band joist is directly supported by a mudsill,header,or by double top wall plates. 12 o.c. 13-3 3-6 14x14 4-8 16x16 5-11 18x18 7-2 18x18 2x10 16"a.c, 11'-6" 4'-1" 14x14 5'-5" 16x16 6'-11" 18x18 8'-5" 20x20 24"o.c. 9'-5" 4'-11" 14x14 6'-6" 16x16 8'-3 18x18 10'-0" 20x20 Placement of Lag Screws and Bolts in Ledgers 12"o.c. 15'-5" 3'-1" 14x14 4'-1" 16x16 5'-2" 16x16 6'-3" 18x18 (Reference iRC Figure 507.2.1(1)) 2x12 16"o.c. 13'-4" 3'-6" 14x14 4'-8" 16x16 5'-11" 18x18 7'-2" 18x18 24"o.c. 10'-11" 4'-1" 14x14 5-5" 16x16 6'-11" 18x18 8'-5" 18x18 LAG SCREW OR BOLT STAGGER FASTENERS Footings must have a minimum reinforcement of(2)#4 bars each way with a 3"clearance to the bottom of the footing. IN 2 ROWS ,1� Note: Footing sizes are based on decks designed with single span joists where there is no center bearing beam. 2"MIN Alf 5.5"MIN FOR 2X8 6.5"MIN FOR 2X10 8 MAX 7.5"MIN FOR 2X12 sm 2"MN iii 314"MIN Deck Ledger Connection to Band Joist a'b LEDGER (Reference IRC Table R507.2-Deck live load=60 psf,deck dead load= 10 psf,snow load<_40 psf) ''DISTANCE CAN BE REDUCED TO 4.5"IF LAG SCREWS For SI: 1 inch=25.4 mm, 1 foot=304.8 mm, 1 pound per square foot=0.0479 kPa. ARE USED OR IF BOLT SPACING IS REDUCED TO Joist Span THAT OF LAG SCREWS TO ATTACH 2X8 LEDGERS TO i 2X8 BAND JOISTS. 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' On=center spacing of fasteners Placement of Lag Screws and Bolts • %inch diameter lag screw with 22 16 13 11 9 8 7 n Ledgers '/inch maximum sheathing e,a (Reference IRC Figure 507.2.1(2)) 1/2 inch diameter bolt with''4 inch 3i) 22 18 15 13 11 10 EXTERIORSHEATHING ji , maximum sheathing d inch diameter bolt with 1 inch i EXISTING STUD WALL IIII maximum sheathing e 26 19 16 13 11 10 9 Existing 2x BAND JOIST �—;., a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist. OR ENGINEERING RIM �r i .o BOARD ( b. Snow load shall not be assumed to act concurrently with live load. 2"MN { ; , ; - C. The tip of the lag screw shall fully extend beyond the inside face of the band joist. 1 li DECK JOIST d. Sheathing shall be wood structural panel or solid sawn lumber. 1-518V1 e. Sheathing shall be permitted to be wood structural panel,gypsum board,fiberboard, lumber or foam sheathing.Up 5. Mnx i . LAG SCREWS OR BOLTS to 1/2-inch thickness of stacked washers shall be permitted to substitute for up to %-inch of allowable sheathing We; 41101111111 thickness where combined with wood structural panel or lumber sheathing. 1100- 1 "•$:•• :�° ,� JOIST HANGER ,,, GENERAL INFORMATION: GENERAL INFORMATION: ® The intent of this Tip Sheet is to provide a general understanding of the code requirements and does .x tyoerr��t The intent of this Tip Sheet is to provide a general understanding of the code requiremer)ts cInd does., 'c yGov�r t , r a ioA not address the subject ingreat detail. femt '" r no.address the subject in great detail, i z , r O Additional information can be obtained from your local particiDatinq jurisdiction. e Additional information can be obtained from your local participating iurisdictlon. •". { # , t i Page 6 of b Clage,5-efir— cilD .. c,� ) 2 ' ^f, : _ ' s. I