PLANS TOWN OF QUEENSBURY
�,�� ,cite) __BUILDING DEPARTMENT
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R507.4 jaeekh'g.Maximum. allowable spacing for joists sup- fl7007.5.1 Lateral restraint at supports. Joist ends and R
porting decking shall be in accordance with Table R507.4. bearing locations shall be provided with lateral restraint to
Wood decking shall he attached to each supporting member prevent rotation. Where lateral restraint is provided by
with not less than (2) 8d threaded nails or (2) No. 8 wood joist hangers or blocking between joists, their depth shall
screws. equal not less than 60 percent of the joist depth.Where lat-
R507.5 Deck joists.Maximum allowable spans for wood deck era) restraint is provided by rim joists, they shall be
joists,as shown in Figure R507.5,shall be in accordance with secured to the end of each joist with not less than(3) lvd
Table R507.5.Deck joists shall be permitted to cantilever not (3-inch x 0.128-inch) nails or (3) No. 10 x 3-inch (76
greater than one-fourth of the actual,adjacent joist span. mm)long wood screws.
TABLE R507.4
MAXIMUM JOIST SPACING
MATERIAL TYPE AND NOMINAL SIZE MAXIMUM ON CENTER JOIST SPACING
Perpendicular to joist Diagonal to joist'
11/4 inch-thick wood 16 inches 12 inches
2-inch-thick wood 24 inches 16 inches
Plastic composite In accordance with Section R507.3 In accordance with Section R507.3
For SI: 1 inch=25.4 mm,1 foot=304.8 mm,1 degree=0.01745 rad.
a. Maximum angle of 45 degrees from perpendicular for wood deck boards
TABLE R5O?.5
DECK JOIST SPANS FOR COMMON LUMBER SPECIES'(ft.-In.)
SPACING OF DECK JOISTS WITH NO CANTILEVER° SPACING OF DECK JOISTS WITH CANTILEVERS°
SPECIES' SIZE (Inches) (Inches)
12 16 24 12 16 24
2 x 6 9-il 9-0 7-7 6-8 6-8 6-8
2 x 8 13-1 11-10 9-8 10-1 10-1 9-8
Southern pine
2 x 10 16-2 14-0 11-5 14-6 14-0 11-5
2 x 12 18-0 16-6 13-6 18-0 16-6 13-6
2 x 6 9-6 8-8 7-2 6-3 6-3 6-3
Douglas fir-larch°, 2 x 8 12-6 11-1. 9-1 9-5 9-5 9-1.
hem-fir°
spruce-pine-firs 2 x 10 15-8 13-7 11-1 13-7 13-7 11-1
2 x 12 18-0 15-9 12-10 18-0 15-9 12-10
Redwood,
2 x 6 8-10 8-0 7-0 5-7 5-7 5-7
western cedars, 2 x 8 11-8 10-7 8-8 8-6. 8-6 8-6
ponderosa pine`, 2 x 10 14-11 13-0 10-7 12-3 12-3 10-7
red pine`
2 x 12 17-5 15-1 12-4 16-5 15-1 12-4
For SI: 1 inch=25.4 mm, 1 foot=304.8 mm,1 pound per square foot=0.0479 kPa,1 pound=0.454 kg.
a. No.2 grade with wet service factor.
b.Ground snow load,live load=40 psf,dead load=10 psf,IJD=360.
c. Ground snow load,live load=40 psf,dead load=10 psf;Lid=360 att main span,IJA=180 at cantilever with a 220-pound point load applied to end.
d.Includes incising factor.
e. Northern species with no incising factor
f. Cantilevered,spans not exceeding the nominal depth of the joist are permitted.
BUILDING WALL ;r BUILDING WALL—s.-
-:It ]r__]r-�r,rlr�r—lr'—n Ir1i—Ir�r� r Ir p1� rlrlr—Ir—x�lr�u� r�
RIM JOIST JOIST HANGER r BEAM—s 11 Y JOIST HANGER JOIST HANGER r1
f 11���GGnnI�,, 11i1J�
BEAM— LL_I
•I JOIST LEDGER BOARD-1 \.JOIST LEDGER BOARD
} POST—�-
-.a—POST
BEYOND
----------------
OPTIONAL JOIST SPAN JOIST SPAN
CANTILEl/Eitr r e.- -'e1 ?,.
NiaT$WITH MOPPED BEAK 1 !KIZI"1_ gAM
FIGURE R507.5
TYPICAL DECK JOIST SPANS
201E/NTERNATIONAL RESIDENTIAL CODE® 163
FLOORS
R507.6 Deck Beattie. Maximum allowable spans for wood R507.7 Deck joisi and deck beam bearing. The ends of
' deck beams, as shown in Figure R507.6, shall be irt accor each joist and beam shall have not less than 11/2 inches (38
dance with Table.1R507.6.Beam plies shall be fastened with mm) of bearing on wood or metal and not less than 3 inches
two rows of 10d (3-inch x 0.128-inch)nails minimum at 16 (76 mm) on concrete or masonry for the entire width of the
inches (406 mm) on center along each edge. Beams shall be beam. Joist framing into the side of a ledger board or beam
permitted to cantilever at each end up to one-fourth of the shall be supported by approved joist hangers. Joists bearing
actual beam span.Splices of multispan beams shall be located on a beam shall be connected to the beam to resist lateral dis-
at interior post locations. placement.
TABLE FR507.6
DECK BEAM SPAN LENGTHS'.b(ft.-in.)
DECK JOIST SPAN LESS T'riAl9 OR EQUAL TO:
SPECIES` SIZE' (feet)
6 8 i0 12 14 16 18
-
2—2 x 6 6-11 5-11 5-4 4-10 4-6 4-3 4-0
2—2 x 8 8-9 7-7 6-9 6-2 5-9 5-4 5-0
2—2 x 10 10-4 9-0 8-0 7-4 6-9 6-4 6-0
2—2 x 12 12-2 10-7 9-5 8-7 8-0 7-6 7-0
Southern pine
3—2 x 6 8-2 7-5 6-8 6-1 5-8 5-3 5-0
3—2 x 8 10-10 9-6 8-6 7-9 7-2 6-8 6-4
3—2 x 10 13-0 11-3 10-0 9-2 8-6 7-1.1 7-6
3—2 x 12 15-3 13-3 11-10 10-9 10-0 9-4 8-10
3 x 6 or 2 2 x 6 5-5 4-8 4-2 3-10 3-6 3-1 2-9
3 x 8 or 2—2 x 8 6-1.0 5-11 5-4 4-10 4-6 4-1. 3-8
3 x 10 or 2—2 x 10 8-4 7-3 6-6 5-11 5-6 5-1 4-8
3 x 12 or 2—2 x 12 9-8 8-5 7-6 6-10 6-4 5-11 5-7
• Douglas fir-larch`,
hem-fire, 4 x 6 6-5 5-6 4-11 4-6 4-2 3-11 3-8
spruce-pine-fir`, 4 x 8 8-5 7-3 6-6 5-11 5-6 5-2 4-10
redwood,
western cedars, 4 x 10 9-11 8-7 7-8 7-0 6-6 6-1 5-8
ponderosa pinef, 4 x 12 11-5 9-11 8-10 8-1 7-6 7-0 6-7
t, red pinef
3—2 x 6 7-4 6-8 6-0 5-6 5-1 4-9 4-6
3—2 x 8 9-8 8-6 7-7 6-11 6-5 6-0 5-8
3—2 x 10 12-0 10-5 9-4 8-6 7-10 7-4 6-11
3—2 x 12 13-11 12-1 10-9 9-10 9-1 8-6 8-1
For SI: 1 inch=25.4 mm,I foot=304.8 mm,1 poUnd per square foot=0.0479 kPa,I pound=0.454 kg.
a. Ground snow load,live load=40 psf,dead load=10 psf,UO=360 at main.span,UD=180 at cantilever with a 220-pound point load applied at the end.
, b. Beams supporting deck joists from one side only.
c. No.2 grade,Wet service factor.
d.Beam depth shall be greater than or equal to depth of joists with a.flush beam condition.
e. Includes incising factor.
f. Northern species.Incising factor not included.
�Ay' JOISTS ��i` �gl�
Fr Y` �� N N YY �1itt
� JOISTS
L _ _J
BEAM BEAM
.)--POSY a POST
OPTIONAL BEAM SPAN OPTIONAL OPTIONAL. BEAM SPAN OPTIONAL.
® ro-ee s,— a► -t t► rt7 . I s►
CANTILEVER CANTILEVER CANTILEVER. CANTILEVER
DROPPED BEAM PLUSH BEAM
FIGURE F3507.6
1YPICAI.DECK BEAM SPANS
154 2015 INTERNATIONAL RESID SF1AL.CODE
•
Ft.(7:QtiEs1
. •
app./Y.:1.Iliock pos4 to deck beam.Peek beams shall be .E1,$07-04'Deck pose Oa deck.footitil.g..P9Sts shall bear on
attached to deck posts in accordance with Time ic507.7.1 footings in accordance with Section R40.3 and Figure
or by other equivalent means capable to resist lateral dis- g507.8,1. Posts shall be restrained to prevent lateral dis-
.,..
placement. Mantifectnred. post-to-bearn connectors shall placement at the bottom support- Such lateral restraint
' . be sized for the post and beam.sizes. All bolts Shall have Shall be,provided by manufactured connectors installed in.
Washers under the head and nut. accordance with Section R507 and the maaufa.cturers'
instructio s or a tninimum post embedment of A2 inches
ER•cepaon; Whexe deck. beams bear directly on foot- • • -II • - - •
•
ings in accordance with Section R507.8.1. (305 mm)in surrotmcling soils or concrete Oen-
- jit$07.6 Peck pasts. or single-level, wood-framed decks
with beams Sized it),accordance with Table R507.6,deck post
r 'size shall be in accordance with Table R507 8
• TAOLR R507.8
. pg.,,,,ii ROW HEIGHT'
'..-
DECK POST Sriff- MAXIMUM HEIGHT'
4 4 8'
_
4 x 6 8'
6 x 6 14'
•
r:. For SI:1 foot-=.•304.8 ram.
a.1Vieasured to the underside of die bearn.
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r: •
r•-..;-.
V d
L'• • BEAM I.
BEAM 2%"MIN.
APPROVED
P••••. ..::. 1111 POST CAP iii--.....
kf--*•:.; .11111111 (2)1/2"DIAMETER
1.4": .•'• . THROUGH-BOLTS
....t;;.••,..
('-,-,. • Elmiummesslii. WITH WASHERS
fill
DECK =, DECK "- 0
posT NOTCH POST
MINPOST
_514" I.
k' • '''
1 '
1.: ile-i-eass)Pow'
.1.-..• For SI: inch=25.4-inin.
i F-101A1F...l•1607.7.1
- :
i.. - • Qr:Cii likAM TO Pffzel"IPOST
1
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CONCRETE TYPICAL DECK
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Millifi urts.i
TYPICAL E) Cc POSTS TO tic;.--001/NOS
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Fi.t3t1131
in accordance with ASTM D 7032. Plastic or composite R507.3.3 Decay resistance. Plastic composite deck
handrails and guards,or their packaging,shall bear a label boards,stair treads,guards and handrails containing wood,
that indicates compliance to ASTM D 7032 and includes cellulosic or other'biodegradable materials shall be decay
the maximum allowable span determined in accordance resistant in accordance with ASTM D 7032.
with ASTM D 7032. R O7.3.4 Termite resistance. Where required by Section
R507.3.2 Flame spread index. Plastic composite deck 318, plastic composite deck boards, stair treads, guards
boards, stair treads, guards, and handrails shall exhibit a and handrails containing wood, cellulosic or other biode-
flame spread index not exceeding 200 when tested in accor- gradable materials shall be termite resistant in accordance
dance with ASTM E 84 or UL 723 with the test specimen with ASTM D 7032.
remaining in place during the test. 507.3.5 Installation of plastic composites. Plastic com-
Exception: Plastic composites determined to be non- posite deck boards,stair treads,guards and handrails shall
combustible. be installed in accordance with this code and the manufac-
turer's instructions.
TABLE R507.2
DECK LEDGER CONNECTION TO BAND JOISTS
(Deck live load=40 psf,deck dead load=10 psf,snow load<40 psf)
JOIST SPAN
CONNECTION DETAILS 6'and!ass 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
I/2 inch diameter lag screw with 1/2-inch 30 23 18 15 13 11 10
maximum sheathing°'d
I/Z inch diameter bolt with t/2 inch maximum 36 36 34 29 24 21 19
sheathings
I/Z inch diameter bolt with 1-inch maximum 36 36 29 24 21 18 16
sheathing`
For SI: 1 inch=25.4 mm,1 foot=304.8 mm,1 pound per square foot=0.0479 kPa.
a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from contacting the house band joist.
t, .
b. Snow load shall not be assumed to act concurrently with live load.
c. The tip of the lag screw shall fully extend beyond the inside face of the band joist.
d. Sheathing shall be wood structural panel or solid sawn lumber.
e. Sheathing shall be permitted to be wood structural panel,gypsum board,fiberboard,lumber or foam sheathing.Up to'/a inch thickness of stacked washers
shall be permitted to substitute for up to I/2 inch of allowable sheathing thickness where combined with wood structural panel or lumber sheathing.
TABLE R507.2.1
PLACEMENT OF LAG SCREWS AND BOLTS IN DECK LEDGERS AND BAND JOISTS
MINIMUM END AND EDGE DISTANCES AND SPACING BETWEEN ROWS
TOP EDGE BOTTOM EDGE ENDS ROW SPACING
Ledger' 2 inchesd 3/4 inch 2 inches' 15/s inchesb
Band Joist° 3/4 inch 2 inches 2 inches" i5/ inches"
For SI: 1 inch=25.4 mm.
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 Figure R507.2.1.(1).
b. Maximum 5 inches.
c. 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 Figure R507.2.1(1).
150 2015 INTERNATIONAL RESIDENTIAL CODE®
i
FLOORS
1
. z STAGGER FASTENERS
I NIA IN 2 ROWS
I
00 0I Cy'''''
— � 4 5.5"MIN.FOR 2 X 8* `DISTANCE SHALL BE PERMITTED TO
5"MAX4 l I 6.5"MIN.FOR 2 X 10 BE REDUCED TO 4.5"IF LAG SCREWS
I O O te, O _7.5"MIN.FOR 2 X 12 1 ARE USED OR BOLT SPACING IS
REDUCED TO THAT OF LAG SCREWS
_
/ TO ATTACH 2 X 8 LEDGERS TO 2 X 8
2*MIN. BAND JOISTS.
LEDGER LAG SCREW OR BOLT 3/4"MIN.
For SI: 1 inch=25.4 mm.
FIGURE cR507.2.)
PLACEMENT OF LAG SCREWS AND BOLTS IN LEDGERS
SHEATHING
NOTE: SIDING
THIS DETAIL IS APPLICABLE
WHERE FLOOR JOISTS ARE FLASHING FOR
PARALLEL TO DECK JOISTS. - WATER TIGHTNESS
I
DECKING
MITrillAPPROVED JOIST HANGERS
2"MIN 1.. TH FASTENERS
1IISO.1 gal INACCORDAN2x LEDGER CE WITH TABLE R507.2
E arm
—am HOLD-DOWN DEVICE MIN 750 LB. CAPACITY
FLOOR JOISTS AT 4 LOCATIONS, EVENLY DISTRIBUTED
IN ALONG DECK AND ONE WITHIN 24"OF EACH
END OF THE LEDGER. HOLD-DOWN DEVICES
SHALL FULLY ENGAGE DECK JOIST PER
HOLD-DOWN MANUFACTURER.
1
I
I A FULLY THREADED 3/e"DIAMETER LAG
SCREW PREDRILLED W/MIN. 3"PENETRATION
I TO CENTER OF TOP PLATE, STUDS, OR HEADER.
t For SX: 1 inch=25.4 rom.
i:
FIGURE R507.2.1(2)
PLACEMENT OF LAG SCREWS AND BOLTS IN BAND JOISTS
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2015 INTERNATIONAL RESIDEN111M.ti=^ys9r;® •13
10 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE
POST REQUIREMENTS Figure 8B. Alternate Approved Post-to-Beam
All deck post sizes shall be 6x6(nominal)or larger, and Post Cap Attachment.
the maximum height shall be in accordance with Table 4
and measured fromgrade or topof foundation, �= _ sawn
or
- M1:�•-_ •.multull i•Ply beam
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 ,i
limited to a maximum height of 14'-0".Posts shall be
o+`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 a 9 0 1;v.
attached to the post by notching as shown in Figure 8A 6xx66min,t
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). 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 'h"diameter lag screws. rhrough ,
For non-ledger decks,(see Figure 21)diagonal bracing
ma be omitted at the beam and osts adjacent to the Note:5uppai of beams eY P or fasteners only is prohibitedhouse. ails. Bearing is required.See
Figure BA.
Figure 8A. Post-to-Beam Attachment
Requirements.
(2)Yp"diameter
single 3"or 4" through-bolts
nominal or double\ / with washers
2"nominal beam s• ,v *m k"
beam must
f_ s6" Figure 10. Diagonal Bracing.
bear fully on
notched 6x6
6x6 min.
)12):2"
• !beam NI I
_ � r
2x4,typical (1)1/2"diameter
lag screw with
r ash.
a) washers,typical
Typical Post At Splice
DIAGONAL BRACING PARALLEL TO BEAM
Note:Diagonal Bracing is prohibited on center posts.
American Wood Council