REVIEWED BLD2022-0298+Calculations+2.24.2022_10.05.23_AM+2700237Basic Deck
This tip sheet reflects code requirements of the 2018 International Residential Code (IRC) with
Washington State Amendments.
Typical Deck
This document provides building code information applicable to prescriptive residential wood
deck design. You may need to hire a licensed architect or engineer to design a deck where any of
the following conditions apply:
• The deck serves other than a one- or two-family dwelling building
• The deck design includes more than one level
+ The deck will support a hot tub, spa or other heavy object, including heavy deck covering (such
as pavers)
The walking surface is more than 14 feet above grade
• The deck ledger is attached to house overhangs, bay windows, bricks, stone, or concrete block
+ The deck is bearing on ground with a slope greater than 1 foot horizontal for every 1 foot
vertical
The deck is self-supporting (not attached to an exterior wall)
See DOW t rar
co!mecr," a
Joist Hanger
Joist
Decking
Vanly *i'afr"i' dI
plaposaa deolrg
Joist Overhang
74' maximum
` C
See Page 6
Joist Spacing t
for Ledger
Attachment
See Span taao Ard / -,I
tdolRK]SGIRr�NH. / r
Post
04 min. Up to a- 6 hn1®trt
5,6 iNn. up to I i 1,61wil
f
:��I.�+pSpan
a
Non -corrosive metal
posUheam connector
Note: Guards are
Seam
Soo span tahla.
required when the deck
Continuous solid brooking
walking surface is more
Footing
between joists
that 30" above � rade.
_
s� spnn table and
1ao!irtg scliDdute.
Beam Overhang
24' maximum
Copyright 2022
All Decks, Inc
THESE DRAWINGS ARE COPYRIGHTED
MAiERUU- AND MAY NOT BE COPIED OR
REDRAWN WITHOUT THE EXPRESSED
WRITTEN CONSENT OF ALL DECKS, ii
THESE DRAWINGS ARE LIMITED TO A
iPROJECT FOR PERSONS NAMED
ND ron THE USE AND
COMPLETION OF ONE CONSTRUCTICN
PROJECT. ANY OTHER USE OR REUSE IS
STRICTLY PRDHI RrcED W171 WRITTEN
CONSENT BY ALL DECKS, INC.
A L L D E (A';"K Z05"
17455 bath Ave NE - Suite 101
<enlmore, LJAshington SSf�28
fnF0ea I ldecics�om
.2C6 919 .5016 License No. ALLDEDDB&01:)U
Deck Construction Notes
• Design loading for decks is based on 60 pounds per square feet (PSF) live load, 10 PSF dead
load, and 1500 PSF soil -bearing capacity.
• The illustrations and information in this tip Sheet may be used for decks whether or not they
require a permit. See Tip Sheet 0 for when a permit is required.
• All wood must be pressure -treated or naturally resistant to decay. Treat cuts, holes, and
notches with end -cut solution.
• Fasteners, hangers, nails, etc., must be stainless steel, hot -dipped galvanized, or as specifically
required for the specified wood preservative used. The coating weights for zinc -coated
fasteners to be in accordance with ASTM A 153. Provide documentation in the field showing
the required fastener protection for the wood chosen for your deck.
+ You may modify any components of this Tip Sheet using accepted engineering practices. Any
modifications must be reviewed prior to permit issuance. All attachments must be per
manufacturer's installation instructions.
• Visit MyBuildingPermit.com for additional Tip Sheets for stairs, handrails, and notching and
boring.
36' minimum high guard
with Intermediate rails Attachment of
spaced so that a sphere pre -manufactured guardall
-- Existing building 4" In diameter cannot syyhall ms tobe deck components
pass through (Sae Tip Special blocking details may be
LF11ashIng. Sheet 3). required by the reviewer.
ee detail 1 on page
forledger - Refer table on page See page 8 for guardrail
tachment options 3 for Joist Sizes post connection
/ [Pecking and Spans
Secure baliusters with (1) #8d
wood screw top & bottom
a You spacing Refer to Table on Beam Size and Spans
e 3 for
recommended \ /
Note, for drainage
Contractor to field
verify adequacy of Knee braces are required If
sogd lu bar for ledger distance from grade to top of
connection. post exceeds 48". See detall
Ir an exit or egress from an page 7
the existing building
passes under the For post size and maximum
pproposed deck, or If there allowable height, see page 4
is an existing patio under
the pproposed deck, 6'-8"
minimum clearance must
be maintained. Please
Indicate openinga in Manufactured post base cast in
existing wall in elevation fogting
view.
- Refer to Table on page 4 for
Footing Size
3,O00 psi concrete (no special
Inspection required)
Finished grade
1"clear
Minimum (2) #4 ea. way, 3" clear
de th of wiw=z�_
'to bottom of footing.
foctin 12"Footng to bear on
gundisturbed earth.
The Nelson Deck
Evan & Anna Nelson
20509 15th Place W
i=dmoni WA SaO2G
425 23,a9847
Standard Deck Framing
Details - IRC 2018
BLD2022-0298
RECEIVED
Mar 09 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
Data January 21t,h 2022
6T6
IRC 1
When using the tables below, interpolation is allowed, extrapolation is not allowed.
Sizing of Structural Elements
Maximum Deck Joist Span
Joist
Joist Spacing b
inches
Joist Back Span
Size
12 16 24
4
6
8
10
12
14
16
18
Allowable Joist Span
Maximum
Cantilever (feet inches)
Joist S
an feet
2x6
7-11
7-1
5-9
1-0
1-6
NP
NP
NP
NAd'acent
P
NP
NP
2x8
10-5
9-5
7-8
1-0
1-6
2-0
2-1
NP
NP
NP
NP
2x10
13-3
11-6
9-5
1-0
1-6
2-0
2-6
2-8
NP
NP
NP__
2x 12
15-5
13-4
10-11
1-0
1-6
2-0
2-6
3-0
3-3
N P
NP
a. Includes Incising Factor.
b. When using composite decking, refer to manufacturer's installation instructions for
maximum spacing of joists.
c. Spans based on Doug Fir -Larch, Hem Fir and Spruce -Pine -Fir, No. 2 grade, wet service
factor.
Minimum Beam Size_
Deck Joist Span feet
6 8 10 12 14 16 18
Beam
Size c,d,e
Maximum Beam Span a,b,d (feet -inches)
4x6
5-2
4-6
4-0
3-5
3-1
2-10
2-7
48
6-11
6-0
5-3
4-7
4-1
3-8
3-5
410
8-5
7-4
6-6
5-10
5-2
4-9
4-5
4x12
9-10
8-6
7-7
6-11
6-4
5-9
5-4
6x6
6-6
5-7
5-0
4-7 _
4-2
3-9
3-5
6x8
8-8
7-6
6-8
6-1
5-6
5-0
4-7
6x10
10-7
9-2
8-2
7-6
6-11
6-4
5-10
6x12
12-4
10-8
9-7
8-9
8-1
7-7
7-1
a. Spans based on Doug Fir -Larch, Hem Fir ana Spruce-rine-l-Ir, ]Vo. [ graue, wt;L SClvit.:C
factor.
b. If 2x built up beams to make 4x or 6x beams, they shall be fastened with two rows of 10d
(3-inch x 0.128-inch) nails minimum at 16 inches on center along each edge (507.5)
c. Beam depth shall be equal to or greater than the depth of intersecting joist for a flush
beam connection.
d. Beam cantilevers are limited to the adjacent beam's span divided by 4.
e. Includes incising factor.
:0 Capyright2022
All [:>e;cks, Inc
THESE DRAWINGS ARE COPYRIGHTED
MATERAL AND MAY NOT BE COPIED OR
REDRAWN WITHOUT THE EXPRESSED
W RI_EN CONSENT OF ALL DECKS. INC.
THESE DRAWINGSARE uAMTED TO A
SPECIFIC PROJECT FOR PERSONS NAMED
HEREIN AND FOR THE USE AND
COMPLETION OF ONE CONSTRUCTION
EROJECT, ANY OTHER USE OR RELSE IS
STRICTLY PROHIBITED WITHOUT WRITTEN
CONSENT BY ALL DECKS, INC.
ALLDECKS
I-1455 65th Ave NE - Sulte 101
Kenmore, UJ45hington e5025
inPoaa I (decics.com
2J�6 9/9 b916 License No. ALLDEDD560DU
Maximum Deck Post Hei ht
Tributary Area e
_
Post
20
40
60 80 100
120 1
140
160
Size c,d
Maximum
Deck Post Height a feet -inches
4x4
10-0
10-0
8-7
7-0
5-8
4-1
NP
NP
4x6
14-0
13-10
11-1
9-5
8-2
7-3
6-4
5-4
6x6
14-0
14-0
14-0
14-0
14-0
13-3
10-9
6-11
8x8
14-0
1 14-0
14-0
14-0
14-0
14-0
14-0
14-0
a. Measured from the underside of the beam to top oT rooting.
b. Based on Doug Fir, Hem Fir and Spruce -Pine -Fir, No. 2 grade, wet service factor.
c. Notched deck posts shall be sized to accommodate beam size.
d. Includes incising factor.
e. Area, in square feet, of deck surface supported by post and footing.
Footin Size a
Tributary Area b
Side of Square
Footing (inches)
Diameter of a
Round Footing
inches
Thickness
inches
(inches)
5
7
8
6
_. 20
12
14
6
40
18
20
6
60
21
24
8
80
25
28
9
100
28
31
11
120
30
34
12
140
33
37
13
160
35
1 40
15
a. Footing dimensions shall allow complete Dearing oT the post.
b. Area, in square feet, of deck surface supported by post and footings.
12" min. frost depth
In allowable soils
a
Thickness `
per Table
Note: Posts must be Width
centered on or In tooting per
Table
The Nelson Deck
Evan & Anna Nelson
20509 78th Place ld
Edmonds, WA 98026
42 5 2 38 984-1
--- Manufactured post connector
1z°
f1"
kill
a
112" diameter
through -bolts in both �
4" gravel
directions
Note: not screws
Typical P.T. post
E r Y�ii
a
Min. 12" of
embedment
Standard Deck Framing
Details - IRC 2018
RECEIVED
Mar 09 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
pate January 2 1th, 2=
Fraje t 875
IRC 2
EXTER[ORSHt A1IiiNG
EXISTING STUD WALL --
Exisling 1x BAND JOIiST
OR ENGINEERING phut
80ARD
�^ 4t#N I
_L T DECK JOIST
fW141r t
s' MAX
LAG SCREWS DR BOLT$
JOIST HANGER
Leg screw or gait Stagger fasteners in 2 rows
2" min.
5 112" min. for 2x8 "
5" max. 6 112" min. for 2x1D
7 112" min. for 2x12
3/4" min.
Ledger A Distance can be reduced to
211 min. 4 1/2" if lag screws are used or
Minimum edge distance for if bolt spacing is reduced to
specialized screws. See that of lag screws to attach 2x8
manufacturer's technirai bulletin. ledgers to 2x8 band joists
Hold-down or
tension device
with 1 a€lCi #
capacity
Flashing
0,ock,toist
Detail 1 — Ledger Attachment for Lateral Loads
(Knee braces are required on posts greater than 4 feet in height.)
Option # 1
Flow sheathing nailing
at 6' o,c. (max) to Est
with bold -clown.
® Copyright2022
All Decks, Eno
THESE DRAWINGS ARE COPYRIGHTED
MATERIAL AND MAY NOT BE CDPIc'❑ DR
REDRAW N W RHOUT THE EXPRESSED
WRITTEN CONSENT OF ALL DECKS, INC.
THESE DRAWINGS ARE LIMITED TDA
SPECIFIC PROJECT FOR PERSONS NAMED
HEREIN AND FOR THE USE AMC
COMPLETION OF ONE CONSTRUCTION
PROJECTL ANVOTHER USE OR REUSE IS
STRICTLYPRISHIRI FED WITHOUT WRITTEN
CONSENT BY ALL DECKS, INC,
Sheathing
Siding
Flashing
Decking
Joists
Joist Hangers
Treated 2xledger
Flow last 750# capacity holddown device
at 4 locations evenly distributed
along the deck and within 2 ft of
each end, install per manufacturer
Fully threaded 318" diameter lag screw
predrltled with a minimum of 3 in
embedment into solid framing.
Option # 2
2` min..
Floor joists
U Kf " b" "
A L L ur" E "0' A
11455 65th Ave NE - Sulu 101
Kenmons, WAshington 98028
infoda Ildecks,com
206 3/3 a5916 License Na_ ALLDEDD860D%�
Deck Ledger and Connections
Deck Ledger Connection to Band Joist
On -Center Spacing of Fasteners inches
Joist Span °
(feet)
1/2-inch diameter lag
screw with %-inch
maximum sheathing b'c'e
'/2-inch diameter bolt
with '/x-inch
maximum sheathing c
'/z-inch diameter bolt
screw with 1-inch
maximum sheathing d
6 T
22
36
35
8
16
31
26
10
_
13
25
21
12
11
20
17
14
9
17
15
16
8
15
13 _
18
7
. _
13�
_
11
a. Ledgers shall be flashed in accordance with Section R703.4 to prevent water from
contacting the house band joist.
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 washers shall be permitted to
substitute for up to 112-inch of allowable sheathing thickness where combined with wood
structural panel or lumber sheathing.
e. For on -center spacing of specialized fasteners refer to the manufacturer's installation
instructions.
Placement of Lag Screws and Bolts in Ledgers and Band Joists
Minimum End and Edge Distance and Spacing Between Rows
Top Edge
Bottom Edge
Ends
Row Spacing
Ledger'
2 inches d
3/4 inch
2 inches b
1-5/8 inches b
Band joist
3/4 inch
2 Inches e
2 inches h
1-5/8 inches
a. Lag screws or bolts must be staggered from the top and bottom along the horizontal run.
See figure below.
b. Maximum 5 inches.
c. For engineered rim joists, the manufacturer's recommendations govern.
d. The minimum distance from the bottom row to the top edge of the ledger must be in
accordance with figure below.
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.
The Nelson Deck
Evan & Anna Nelson
20509 15th Place W
Edmcnds, WA 9802r.
425 238 9841
Standard Deck Framing
Details - IRC 2018
RECEIVED
Mar 09 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
Mate Jam"ru 211h.2=
!'roject eT6
IRC 3
Connections and Fasteners
(Ali fasteners, nails, bolts, screws, and connectors must be corrosion resistant.)
Type of Connection:
Notes:
Manufactured Connectors
Follow manufacturer's instructions
Post to Footing
Post base is required
Post to Footing (High Winds)
Consult with jurisdiction about additional uplift loads where wind
exposure is greater than Risk Category B
Post to Beam
Connector is required
Ledger to House Framing
See information on Sheet 5 and Sheet 6
Joist to Beam or Girder
3 8d — Toe nailed
Blocking or Bridging to Joist
2 10d — Toe nailed at each end
Wooden Deck Boards
48d threaded nails OR (2) No. 8 screws
Composite Decking
Follow manufacturer's instructions
Post to Beam Connection with Knee Brace
(Knee braces are required on posts greater than 4 feet in height.)
.or 1 3 the height of the post, gy
whiohever is gfeater
Gorrosio n resistant,
metal calu'mn cap.
Follow manufacturer's
installaliori instwrtions,
iV
Alternate Knee :Brace Detall:
W knee brace face nailed Asa. side Df
post and bearn with 4-1 rid: nails at each
face wind connection
® Copynght2D22
All Decks, Inc
THESE DRAWINGS ARE COPYRIGHTED
MATERIAL AND MAY NOT BE COPIED OR
REDRAWN NIITHOUT THE EXPRESSFD
WRITTEN CONSENTCF ALL DECKS, INC
THESE DRAWINGS ARE LIMITED TO A
SPECIFIC PROJECT FOR PERSONS NA FD
HEREIN AND FOR THE USE AND
COMPLETION OF ONE CONSTRUCTION
PROJECT. ANY OTHER USE OR REUSE IB
STRICTLY PROHIBITED WITHDU1 WRITTEN
CONSENT BY ALL DECKS, INC.
Beam splices must occur
over posts with 1-V2" min- nearing
Girder team
4 x 4 knee brace
(i) 118" dierneterthru-boot or &!2
lard screws with washers, tgp & outtom
(typical)
Pressure treated
wood post
Guards $ Attachment
Guards are required when the deck is more than 30 inches above grade.)
2x2 Baluster, typical
6'_0" max. spacing ---- ---- 2x6 or 5/4 board ail cap: attach
to guard past with (3) #12 by 3"
long screws or (3) 16d threaded
nails with 0.148 nominal
diameter
2x4 top and bottom; attach to
guard post with (2) 8d threaded
nails or (2) #8 wood screws
>_ 2 112" long on inside face
�- 4x4 guard post, typical
nn Nnt Nntrtt
2 x 8 nominal rim or outside
------------ joist, minimum
2 5/8" diameter Openings shall Attach balusters at top and bottom with
through -bolts not allow the (1) #8 wood screw or (2) 8d post -frame
and washers passage of a 4" threated nails with 0.135 nominal
diameter sphere diameter
O.D. galvanized bolt
or threaded rod w/
nuts & washers
Zf min and F max
Min. 1800#
tension device
4x4 min. post
@ 60" o.c. max., Typ
—1 7min
Section A
2x8 min. blocking
2"min
2x8 min. deck 2"min
joists& rims 2min and 4"max
2"min
Note:
Use above details for guard canner#ions or provide engineered Arlin. 1800# tension straps
design that shows Guards can resist a single concentrated load []
of 200 � applied in any direction at any point along the top and Section B
have attachment devices and supporting structure to transfer this
load to appropriate structural elements of the building per IBC
sec 1607.7.1.1
The Nelson Deck
Evan & Anna Nelson
20509 i8th Place LU
Edmonds, WA 9802(0
425 238 e84'1
5/s" D.D. galvanized bolt
or threaded rod w/
nuts & washers
Standard Deck Framing
Details - IRC 2018
RECEIVED
Mar 09 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT
DAie January 21fh, 2=2
Project mr,
IRC 4