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Appy ved Plans
By Date g � - 1
Typical Deck Detai
Typls AUG . 4 20"
OFFICE COPY
YOU CAN USE TO BUILD YOUR DECK CM 01 TIGARD
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j REVISION
Introduction 2 Lateral Support of Decks 13
Obtaining Permits 2 Joist Hangers 14
General Notes 2 Rim Joist Requirements 14
Getting Started 4 Built-up Beam Requirements 14
Beam, Joist, and Footing Sizes 4 Post-to-Beam Requirements 15
Post Sizes 8 Footings 15
Ledger Attachment Requirements 8 Guardrail Requirements 16
Prohibited Ledger Attachments 10 Stair Requirements 18
Ledger Board Fasteners 11 Stair Handrail Requirements 19
Freestanding Decks 12 Framing at Chimney or Bay Window.. 20
Name: Ai/Ail—VI-Val s,/ h/ 9 Permit No:r5r&o//2 —6'1Y-2-2.--7
Address: /2 Q?6 ,5 to Ay -
The use of this typical deck detail package in lieu of submitted drawings applies to single
span, one level, single-family residential decks only. Decks must be constructed in strict
conformance with the details contained herein. If a permit is required, a copy of this deck
detail package must be on the job site and available to the inspector during the inspection
process. This guide is intended to help provide typical information needed for
constructing a deck; however,you will need to have at least some understanding of typical
construction practices in order to complete the project.
Typical Deck Details revised 2/08 Page 1 of 27
INTRODUCTION
These plans and details are provided to assist you in your deck construction, for
obtaining a building permit (when required), or simply to aid you in constructing a deck
that does not require a permit.
Before proceeding, always check with your local jurisdiction for land use, zoning,
or other regulations that may affect your project.
When Do I Need A Permit For A Deck?
A building permit is required for all decks that are 30 inches or more above grade. A
building permit is not required for decks that are less than 30 inches above the ground
and not less than 3 feet from a property line.
How Do I Use The Plans To Get A Permit?
If you need a building permit for your deck, you will need to submit plans of sufficient
detail to your local building department to indicate what you want to build. If you are
not sure how to draw plans, these plans can be submitted to your local building
department for the permit. You will, however, be required to follow the plans and
details as provided without any deviation. One thing that will be needed is a site plan
that shows an outline of your property (property lines), the house, and outline of where
you will be locating the deck and how it will appear. Be sure to indicate any additional
existing accessory buildings or structures (shed, pool, retaining walls, etc.). The site
plans will need to be drawn to an acceptable scale (you may need to contact your local
building department for this), but usually a scale of 118th or 114th of an inch equal to one
foot or similar is acceptable. Fill out a building permit application, and submit these
plans (along with your site plan). After the plans are reviewed and approved, a permit
to construct your deck will be issued (some jurisdictions may even be able to review and
approve your plans at the counter, so you can leave with a permit the same day).
Consult your local city/county jurisdiction for the number of sets of plans required.
For information on contacting your local building departments, visit
www.BCD.Oregon.gov, and click on Jurisdictions.
How Big Do The Footings, Beams, And Joists Need To Be?
The detail in these plans will help you determine how big the footings, beams, joists,
posts, and ledgers need to be. Much of it depends on the size of the deck, what size
beams and joists you want to use, and how far apart you want to place the beams,
posts, and footings.
General Notes
1. All lumber shall be grade #2 Douglas-Fir, Hem-Fir, or better and shall be pressure
treated (to resist insect and dry rot) in accordance with American Wood-Preservers'
Association Standards (Category). Decking material of redwood or cedar does not
require pressure treatment as it has a natural resistance to decay. The pressure-
treatment category identified below will be identified on the lumber. The level of
treatment depends on the use as follows:
a. Decking material, railings, joists, and beams must be treated to a Category
UC3B.
b. Posts and other woods located on, in, or in contact with the ground must be a
Category UC4B.
c. Any wood less than six inches above the ground or in contact with concrete must
be a Category UC4A.
Typical Deck Details revised 2/08 Page 2 of 27
2. The level of preservative treatment is noted on the tags fixed to the ends of the wood
members. Remember, any time you make a cut, treat the cut end of the wood
with a paint-on preservative. Cut ends expose the inner untreated wood to
potential moisture and insect damage.
3. All nails shall be "common" or"box" galvanized. It is recommended that "common"
nails be used. They have a thicker shank and are stronger than "box" nails.
4. New pressure treatment methods use chemicals that will prematurely corrode
standard fasteners, hardware, and flashing when in contact with pressure
treated lumber; and as a result, fastener and hardware requirements have
changed. Note the following:
a. All screws and nails shall be hot-dipped galvanized or stainless steel.
b. All hardware (joist hangers, cast-in-place post anchors, etc.) shall be
galvanized with 1.85 oz/sf of zinc (G-185 coating) or shall be stainless steel.
Look for products such as "Zmax" from Simpson Strong-Tie or"Triple
Zinc" from USP.
5. Decks constructed according to this handout are not designed to support spas or hot
tubs. Installation of spas or hot tubs will require additional structural supports.
6. Decks shall not be attached to house overhangs, bay windows, brick veneers, or
chimneys.
7. Deck designs that deviate from the conditions of this handout will require a specific
plan submission and may require engineering.
8. Inspections:
a. A footing, framing, and a final inspection are required on all decks.
b. Footing inspections are required PRIOR to the placement of concrete.
c. Framing and final inspections may be combined if all portions of the deck framing
and mechanical attachments are at least four feet above grade.
d. It is the responsibility of the permit holder or the permit holder's representative to
notify the city/county who issued the permit when stages of construction are
reached that require an inspection. For information on contacting your local
building departments, visit www.BCD.Oregon.gov and click on "Jurisdictions."
9. All decking material shall be composed of 2x4, 2x6, or five quarter ("5/4") boards.
Attach decking to each joist with two 10d nails or two #8 screws. Decking may be
placed from an angle perpendicular to the joists to an angle of 45 degrees to the
joists. Decking must have a span length such that each board bears on a minimum
of two joists.
10.Plastic or composite decking products may be used as a substitute for conventional
wood decking, but installation and span lengths of the substituted material must be
in strict conformance with the product listing and the manufacturer's installation
instructions. Copies of the manufacturer's installation instructions must be submitted
with this handout and permit application.
Typical Deck Details revised 2/08 Page 3 of 27
11.The sizing for footings, posts, beams, and joists are only to be used in areas
(counties) that have an elevation at or below that indicated in Table 1. Areas above
those indicated in Table 1 need to consult their local jurisdictions for snow loading to •
determine if the area is subject to snow loads in excess of 40 pounds per square
foot. If the snow loads exceed 40 pounds per square foot, this document cannot be
used.
12. Footings for decks constructed according to this handout shall not be placed on
ground with a slope greater than 2 horizontal for every 1 vertical.
13. Decks that are greater than six feet in width and attached to the house with doors,
windows or openings below must check the to verify the existing headers over those
openings can support the additional load added by the deck. Check with your local
jurisdiction for the Oregon Residential Code table to verify.
Table 1
Snow Load
(Maximum Elevation for Counties with a Snow Load of 40 psf or Less)
Maximum elevation 750 feet: Benton, Clatsop, Columbia, Coos, Curry,
Lincoln, Polk, Tillamook, Washington, Yamhill
Maximum elevation 900 feet: Clackamas, Marion, Lane, Multnomah
Maximum elevation 1,000 feet: Linn
Maximum elevation 2,000 feet: Douglas, Josephine, Sherman, Wasco
Maximum elevation 3,000 feet: Baker, Gilliam, Morrow, Umatilla, Union,
Wallowa
Maximum elevation 4,000 feet: Crook, Deschutes, Grant, Harney, Jefferson,
Klamath, Lake, Malheur, Wheeler
Cannot be used in Hood River County (minimum 50 psf snow load)
Getting Started
To effectively use the information contained in this document, you will need to do the
following:
1. Determine if your deck requires a permit. Note: even if a permit is not required,
zoning regulations (setbacks) and public utility easement restrictions are still
applicable. Before proceeding, always check with your local jurisdiction for
land use, zoning, or other regulations that may affect your proiect.
2. Determine where your property lines are located and what setbacks your jurisdiction
requires from the property line to the edge of the deck.
3. Determine if you have any public easements on your property and whether or not
the deck can be constructed over the easement, if applicable (in most cases, you
cannot build over a public easement).
Typical Deck Details revised 2/08 Page 4 of 27
4. Determine how big and what configuration you want your deck. Note: The drawings
contained in this document may indicate square or rectangular configurations;
however, configurations can be diamond, trapezoidal, or other shapes as long as the
longest spans are used to determine beam, joist, and footing sizes. The deck can
have up to a two-foot maximum joist and/or beam overhang. See Figures 1, 2, and
3. Beams must be support on each end by a post and cannot be supported with
beam hangers off the house. (Beams are identified as item "A", posts as item "B",
joists as item "C," and footings as item "D.") It is recommended that you first
determine the joist span "C," and then note what beam and footing sizes you
will need.
BEAM, JOIST, AND FOOTING SIZES
The span of a joist is measured from the centerline of bearing at one end of the joist to
the centerline of bearing at the other and does not include overhangs. Maximum joist
span lengths are noted in Tables 2 and 3. See Figures 1 and 2 for joist span types.
-- OPTIONAL OVERHANG
, _-- --- BLOCKING
- -- - –
B
--.---�.._- _------
__.--_-_
-__ I I
2'-0-- --- , JOIST SPAN _
'MAX "MIN SPAN =6'-0""WITH OVERHANG'S
Figure 1 -Joist Span—Deck Attached At House
— OPTIONAL OVERHANG ---
r"
- B=LOCKING j
1
II .
r�---- A �r
} c 43
- B
7 -- JOIST SPAN 7-0"
MAX MIN SPAN - 6-0 WITH OVERHANG MAX
Figure 2-Joist Span-Free-Standing Deck
Typical Deck ,-- OPTIONAL pV_Rr.;NG age 5 of 27
5. Tables 2 and 3 provide you with the information to determine how big the footings,
beams, and joists need to be. The size will depend on how big the deck will be and
how many footings and posts are going to be used; how far the beam(s) will span
from post-to-post (or ledger); and how far the joist will span from beam-to-beam. To
start with, contact your local jurisdiction to determine what the assumed soil bearing
value is for your area. This document has footing details for soils that can support
between 1,000 to 1,500 pounds per square foot (psf) (See Table 2) and soils that
can support over 1,500 pounds per square foot (psf) (See Table 3). If you have soil
bearing of less that 1,000 psf, you will need to consult with your local jurisdiction.
Note: The footing details are based on native soil and not soil that has been
deposited on your property (fill) in depths greater than 12 inches. The footing details
require a footing that is a minimum of 18 inches in height so the bottom can be
located a minimum of 12 inches below the finished grade and extend six inches
above the finished grade. If you have fill material that is greater than 12 inches, your
footing will need to extend through the fill to native soil. The footing will need to
extend below the finished grade due to the frost depth for your county. See Table 4
to determine this depth. Footings for freestanding decks (those not attached to the
house) are not required to be placed below the frost line. Footings for freestanding
decks may reduce the footing thickness to a minimum of eight inches.
TABLE 2
Typical Deck Details revised 2/08 Page 6 of 27
DECKS ON SOIL WITH A 1000 PSF TO 1500 PSF BEARING CAPACITY
(Note: All footings are to be placed a minimum of 12 inches below the surface
of the finished grade and cannot be placed on fill.)
2x6 joists cannot be used when a guardrail is required.
1.) If you And 2.) you Then 3.) And 4.) the And 5.) they And 6.) the
have a beam have posts you can minimum can be footings "D"
"A" that is: "B" only span size joist spaced a supporting the
supporting the joists you can use maximum posts will need
the beam "C": is: of: to be a
spaced: I minimum of:
14"x14"x 18" or
4x6 or (2) 2x6 6'-0" apart 6'-0" 2x6 24" apart 16" diameter x
18"
18x18"x 18" or
4x8 or (2) 2x8 8'-6" apart 6'-0" 2x6 24" apart 20" diameter x
18"
4x10 or (2) 20"x20"x18" or
2x12 10'-6" apart 6'-0" 2x6 24" apart 23" diameter x
18"
22"x22"x18" or
4x12 12'-6" apart 6'-0" 2x6 24" apart 25" diameter x
18"
18x18"x 18" or
4x6 or (2) 2x8 6'-0" apart 8'-0" 2x6 or 16" apart or 20" diameter x
2x8 24" apart 18"
4x8 or (2) 20"x20"x18" or
8'-0" apart 8'-0" 2x6 or 16" apart or 23" diameter x
2x10 2x8 24" apart
18"
4x10 or22"x22"x18" or
2
( ) 9,-6„ apart g -0 2x6 or 16” apart or 25" diameter x
2x12 2x8 24" apart
18"
22"x22"x18" or
2x6 or 16" apart or 25" diameter x
4x12 11'-0" apart 8'-0"
2x8 24" apart 18"
18"x 18"x 18" or
4x6 or (2) 2x8 5'-6" apart 101-0" 2x8 or 16" apart or 20" diameter x
2x10 24" apart 18"
4x8 or (2) 20"x20"x18" or
7'-6" apart 101-0" 2x8 or 16" apart or 23" diameter x
2x10 2x10 24" apart 18"
4x10 or (2) 22"x22"x18" or
9-0 apart 10J-0" 2x8 or 16" apart or 25" diameter x
2x122x10 24" apart 18"
2x8 or 16" apart or 24"�x24"x18" or
4x12 10'-6" apart 10'-0" 2x10 24" apart 27 diameter x
18
4x6 or (2) 2x8 5'-0" 12'-0" 2x10 or 16" apart or 18"x18"x18" or
2x12 24" apart 20" diameter x
Typical Deck Details revised 2/08 Page 7 of 27
1.) If you And 2.) you Then 3.) And 4.) the And 5.) they And 6.) the
have a beam have posts you can minimum can be footings "D"
"A" that is: "B" only span size joist spaced a supporting the
supporting the joists you can use maximum posts will need
the beam "C": is: of: to be a
spaced: minimum of:
o
18"
4x8 or (2) 6'-6" 12'-0" 2x10 or 16" apart or 2ia"x18" or
2x10 2x12 24" apart 23" diameter x
18"
4x10 or (2) 8'-6" 12'-0" 2x10 or 16" apart or 25"x22"x18" or
2x12 2x12 24" apart 25 diameter x
18"
2x10 or 16" apart or 24"x24"x18" or
4x12 10'-0" 12'-0" 2x12 24" apart 27" diameter x
18"
18"x18"x18" or
4x6 or (2) 2x8 4'-6" 16'-0" 2x12 16" apart 20" diameter x
18"
4x8 or (2) 22"x22"x18" or
2x10 6'-0" 16'-0" 2X12 16" apart 25" diameter x
18"
4x10 or (2) 24"x24"x18" or
2x12 7'-6" 16'-0" 2X12 16" apart 27" diameter x
18"
26"x26"x18" or
4x12 9'-0" 16'-0" 2x12 16" apart 30" diameter x
18"
TABLE 3
Typical Deck Details revised 2/08 Page 8 of 27
DECKS ON SOIL WITH A 1500 PSF OR GREATER BEARING CAPACITY
(Note:All footings are to be placed minimum of 12 inches below the surface
of the finished grade and cannot be placed on fill.)
2x6 joists cannot be used when a guardrail is required.
1.) If you And 2.) you Then 3.) And 4.) the And 5.) they And 6.) the
have a beam have posts you can minimum can be footings "Cr
"A" that is: "B" only span size joist spaced a supporting the
supporting the joists you can use maximum posts will need
the beam "C": is: of: to be a
i spaced: minimum of:
12"x12"x 18" or
4x6 or (2) 2x6 6'-0" apart 6'-0" 2x6 24" apart 14" diameter x
18"
15x15"x 18" or
4x8 or (2) 2x8 8'-6" apart 6'-0" 2x6 24" apart 17" diameter x
18"
4x10 or (2) 16"x16"x18" or
2x12 10'-6" apart 6'-0" 2x6 24" apart 18" diameter x
18"
18"x18"x18" or
4x12 12'-6" apart 6'-0" 2x6 24" apart 20" diameter x
18"
2x6 or 16" apart or 14x14"x 18" or
4x6 or (2) 2x8 6'-0" apart 8'-0" 16" diameter x
2x8 24" apart 18"
4x8 or (2) 2x6 or 16" apart or 16',',x16"x18" or
2x10
8'-0" apart $ -0 2x8 24" apart 18 diameter x
18"
4x10 or 18"x18"x18" or
2
( ) 9'-6" apart g�_0�� 2x6 or 16" apart or „
2x12 p 2x8 24" apart 20 diameter x
18"
2x6 or 16" apart or 18"x18"x18" or
4x12 11'-0" apart 8'-0" 20" diameter x
2x8 24" apart 18"
2x8 or 16" apart or 14"x14"x 18" or
4x6 or (2) 2x8 5'-6" apart 10'-0" 16" diameter x
2x10 24" apart 18"
4x8 or (2) 2x8 or 16" apart or 16"x16"x18" or
2x10
7'-6" apart 10 -0 2x10 24" apart 18" diameter x
18"
4x10 or (2) 2x8 or 16" apart or 18"x18"x18" or
2x12
9'-0" apart 10 -0 2x10 24" apart 20" diameter x
18"
2x8 or 16" apart or 20"x20"x18" or
4x12 10'-6" apart 10'-0" 23" diameter x
2x10 24" apart 18"
4x6 or (2) 2x8 5'-0" 12'-0" 2x10 or 16" apart or 14"x14"x18" or
2x12 24" apart 16" diameter x
Typical Deck Details revised 2/08 Page 9 of 27
1.) If you And 2.) you Then 3.) And 4.) the And 5.) they And 6.) the
have a beam have posts you can minimum can be footings "D"
"A" that is: "B" only span size joist spaced a supporting the
supporting the joists you can use maximum posts will need
the beam "C": is: of: to be a
spaced: minimum of:
18"
4x8 or (2) 6'-6" 12 -0 2x10 or 16" apart or 16"x16"x18" or
2x102x12 24" apart 18" diameter x
18"
4x10 or (2) 8._6.. 12 -0 2x10 or 16" apart or 18"x18"x18" or
2x12 2x12 24" apart 20" diameter x
18"
4x12 10'-0" 2x10 or 16" apart or 20"x20"x18" or
12'-0" 2x12 24" apart 22" diameter x
18"
4x6 or (2) 4'-6" 15"x15"x18" or
2x8
16'-0" 2x12 16" apart 17" diameter x
18"
4x8 or (2) 18"x18"x18" or
6'-0" 16'-0" 2X12 16" apart 20" diameter x
2x10
18"
20"x2018"
4x10 or (2) 7'-6" 16'-0" 2X12 16" apart 23" diameter xr
2x12
18"
9'-0" 16'-0" or
4x12 g�_p
16'-0" 2x12 16" apart 25" diameter x
18"
Table 4
Frost Depth
Counties with a frost depth of 12 Benton, Clackamas, Clatsop, Columbia, Coos,
inches: Curry, Lane, Lincoln, Linn, Marion, Polk, Tillamook,
Washington, Yamhill
Counties with a frost depth of 18 Crook, Deschutes, Douglas, Jackson, Jefferson,
inches: Josephine, Multnomah
Counties with a frost depth of 24 Baker, Gilliam, Grant, Harney, Hood River,
inches: Klamath, Lake, Malheur, Morrow, Sherman,
Umatilla, Union, Wallowa, Wasco, Wheeler
6. After determining the soil bearing capacity, frost depth, sizes for the footings, posts,
beams, and joist from the table, mark the information in the space provided below:
Typical Deck Details revised 2/08 Page 10 of 27
OFFICE COPY
REVISION
a. Soil Bearing Value: / '''r,0 psf.
b. Frost Depth: /2 inches.
c. Footing Size: �Z x .2-Z x /49 , spaced fG apart.
d. Post Size: le x ,e/ , spaced f apart.
e. Beam Size: ,► x /2 , spaced /G apart.
f. Joist Size: ___2___x /1 , spaced /6 apart.
7. Determine if you will be connecting to a band board (rim joist), see Figure 5; a
concrete wall, see Figure 6; or a sill plate, see Figure 7. Note: This document
cannot be used with masonry walls.
8. See Figures 14 to 36 for bracing, connection, built-up beam, footing, guardrail,
handrail and stairway details.
POST SIZES
Post sizes are 4x4 minimum for decks six feet or less above the ground and 4x6 for
decks over six feet above the ground. Decks with posts over ten feet above the ground
cannot be used and require an engineered design. Use a minimum 4x6 post under all
beam splices.
LEDGER ATTACHMENT REQUIREMENTS
General: There are several methods for attaching a ledger board to the house. How it
is attached depends on how the house is constructed and where the ledger will be
attached. Ledger board attachments to the existing exterior wall shall be constructed in
accordance with Figures 5 through 7. When attachments are made to the existing
house band board, it shall be capable of supporting the new deck. If this cannot be
verified or conditions at the existing house differ from the details herein, then a free-
standing deck is required (See section on Free-Standing Decks.). You must verify the
existing conditions in the field prior to applying for a building permit. Compliance with all
the requirements herein is critical to ensure the structural stability of your deck.
Siding and Flashing: Siding or the exterior finish system must be removed prior to the
installation of the ledger board. Flashing is required at any ledger board connection to a
wall of wood-framed construction and shall be composed of copper (attached using
copper nails), stainless steel, UV-resistant plastic, or galvanized steel coated with 1.85
oz/sf of zinc (G-185 coating).
Manufactured Wood Joist: The term "MWJ" denotes manufactured
t&J
wood "I"joists. See Figure 4. Examples of manufactured wood joists are
TJI, GPI, and LPI. Older homes constructed with MWJs may only
include a plywood band board, while some newer homes may have 1'/ -
inch manufactured wood rim joists. In these cases, a freestanding deck
�,'I" or a full plan submission is required.
9 q
Figure 4: MWJ Profile "
Typical Deck Details revised 2/08 Page 11 of 27
EXTERIOR
SHEATHNG 41 CONT FLASHING W/DRIP
EDGE BEHIND BUILDING
EXISTING WALL PAPER OR WATERPROOF
MEMBRANE
EXISTING 2X
DECKING OVER
RIM(BAND) .-'" , DECK JOIST
N:iiiiiira b.:77.d b.-7%qt ii.-7 7—
Mil m
2X FLR JOIST I I 2X LEDGER
EXISTING WAU. (2)3/8'LAG SCREWS OR
FRAMING OR I (2)#14 WOOD SCREWS OR
CONCRETE WALL I (1)SIMPSON SDS SCREW
(SHOWN DASHED) I OR EQUAL 0 SPACING"S"
Figure 5—Attachment of Ledger Board to Band Board with Lag or Wood Screws
(See Figure 11 for Spacing "S").
SPACING"a"
JOIST SPAN (2)318'DIA LAG SCREWS (2)1114 WOOD SCREWS SIMPSON SDS 114 X 3 1/2"
0 t SPAN 1 8' r 10• 16"
8'<SPANS 10' 5' g" 16"
10'<SPAN 414' 4" 8" 12'
14'4 SPAN x1$' 3' 5" 9'
Typical Deck Details revised 2/08 Page 12 of 27
EXTERIOR CONT FLASHING W/DRIP
SHEATHING EDGE BEHIND BUILDING
PAPER OR WATERPROOF
EXISTING WALL MEMBRANE
EXISTING 2X DECKING OVER
RIM (BAND) DECK JOIST
IMF 111111111
2X FLRII 2X LEDGER W/ 1/2"DIA BOLTS
JOIST OR MWJ I STAGGERED AT SPACING"S"
LOCATE FIRST BOLT 2"FROM
EXISTING WALL f END OF LEDGER.
FRAMING OR
CONCRETE WALL I
(SHOWN DASHED)
Figure 6—Attachment of Ledger Board to Band Board with Bolts.
(See Figure 11 for Spacing "S").
JOIST SPAN SPACING"S"
0 < SPAN18' 10"
8'< SPAN__< 10' 8"
1011 SPAN 114' 6"
14'1 SPAN 1116' 5"
SEE FIGURE 11 FOR DETAIL
Typical Deck Details revised 2/08 Page 13 of27
CONCRETE WALL
DECKING OVER
DECK JOIST
1.�
2X LEDGER W/1/2" DIA
EXPANSION ANCHORS
STAGGERED AT SPACING"S"
WITH MINIMUM 21/2"
EMBEDMENT.
Figure 7—Attachment of Ledger Board to Concrete Wall.
(See Figure 11 for Spacing "S").
JOIST SPAN SPACING "S"
0< SPAN 8' 18"
8' < SPAN s 10' 15°
10'< SPAN 414' 10'
14'< SPAN s16' 5"
SEE FIGURE 11 FOR DETAIL
Typical Deck Details revised 2/08 Page 14 of 27
PROHIBITED LEDGER ATTACHMENTS
Attachments to the ends of premanufactured open web joists, to brick veneers, and to
house overhang/bay windows are strictly prohibited; see Figure 8 through Figure 10. In
such cases the decks shall be free-standing. See section on Free-Standing Decks.
A oPtrussssIII li Iii. 1
1,1
ikIv �. ; MtIrAll'olilkwid pi
w, 0......, .1 _ 0.---...12,
� I II ri 1, iii /444 1
=
44
tI ► .I�II
rid 1..„
crrwso
Figure 8: No Attachment Figure 9: No Attachment Figure 10: No Attachment
To Open Web Trusses To Brick Veneer To House Overhang
LEDGER BOARD FASTENERS
All fastener types shall be spaced per the tables provided with Figures 5 through 7 and
installed per Figure 11. All fasteners shall be installed with washers and must be
thoroughly tightened. Adequacy of connections shall be verified by the building
inspector. If a ladder is required to access the ledger board fro inspection, one must
be provided by the property owner, permit holder, or their representative.
WHERE SIMPSON SDS SCREWS
1 112" ARE USED,STAGGER SCREWS
1 TOP AND BOTTOM
I .i.4„
4 0 0
EG
EU 1% ^ 1 o 0 o ....1, PLATE BEYOND
4 SPACING"Si_
Figure 11 -Ledger Board Fastener Spacing and Clearances
Thru-bolts: Thru-bolts shall have a minimum diameter of %'. Lead (pilot) holes for
thru-bolts shall be 17/32" to 9/16" in diameter. Thru-bolts must be equipped with washers
at the bolt head as well as the nut. Thru-bolts are those where a hole is drilled all the
way through the wood members and a nut and washer are attached to complete the
connection.
Typical Deck Details revised 2/08 Page 15 of 27
Expansion (Wedge) Anchors: Use expansion anchors when attaching a ledger board
to a concrete wall as shown in Figure 7. Bolt diameters of the anchors shall be a
minimum of ; in some cases, this may require an anchor size of 5/8". Minimum
embedment length shall be 2W. Expansion anchors must have washers.
IMPORTANT NOTE: Expansion anchors must be installed as required by the
manufacturer's instructions. This may include cleaning the holes drilled in the
concrete to ensure they are free of dirt, debris, and moisture. Improper
installation of the anchors can result in catastrophic failure and collapse of the
deck.
Copies of the manufacturer's installation instructions must be submitted with this
handout and permit application.
Lag Screws: Lag screws shall have a minimum diameter of 3/8" and shall be hot-
dipped galvanized or stainless steel. Lag screws may be used only when the field
conditions match those shown in Figure 12. You must verify the existing conditions
in the field prior to applying for a building permit and installing lag screws.
Compliance with all the requirements herein is critical to ensure the structural
stability of your deck. See Figure 12 for lag screw length and shank requirements.
All lag screws shall be installed with washers. Lag screws are those where a pilot hole
is drilled into the wood members that are to be connected together and the lag is
screwed into the hole, a washer is required on the lag head, but no nut and washer is
needed on the screw end.
lag screws crust be hot-
dipped galvanized or
4\1\1\1%141\10
1 stainless steel only
screw must penetrate
1-1/2"shank length must extend through beyond band boardMm
(no threads) existing band board 1m Joist ) a minimum o!1!2'
Figure 12-Lag Screw Requirements
Lag Screw Installation Requirements: Each lag screw shall have lead (pilot) holes
drilled as follows: 1) drill a 3/8" diameter hole in the ledger board, 2) drill a /16 diameter
hole into the solid connection material of the existing house. DO NOT DRILL A 3/8"
DIAMETER HOLE INTO THE SOLID CONNECTION MATERIAL.
The threaded portion of the lag screw shall be inserted into the lead hole by turning.
DO NOT DRIVE WITH A HAMMER. Use soap or a wood-compatible lubricant as
required to help facilitate tightening. Each lag screw shall be thoroughly tightened.
Typical Deck Details revised 2/08 Page 16 of 27
FREESTANDING DECKS
RIM 411$7—
Decks that are free- 1
standing do not utilize the
exterior wall of the existing 14:111arm
house to support vertical
or lateral loads. Support at
1111%111A.1, '
or near the house is II
provided by an additional r` C.tea,:
beam and posts. See ,„,,,s., r _ • )
Figure 13. Beam size is j� ..� 174'; '8
scRre \/ �})
determined by Table 2 or 1 it.
Table 3. \ J J _ 11 ;> r`
1
I
Figure 13-Free-Standing Deck
LATERAL SUPPORT OF DECKS
Decks greater than 30-inches above grade shall resist lateral loading and movement by
the following methods:
111111 I I'II ill IiIJIi[11111111 IiII1w . t. . _ _ _ li . .
THROUGH / \ •\\2XX 6— ti
_ .
/ CROSS \ '-
0 _, •i
•1T ATCEq:H BRACE '' \
11-
/ ,, // �
L.
SOLID BLOCK AT INTERSECTION �~
OF WOOD BRACES WITH
(1)3/8-DIA.THROUGH BOLT(TYPICAL)
Figure 14
DIAGONAL BRACING REQUIREMENTS
Diagonal Cross Bracing: Provide diagonal cross bracing as shown in Figure 14.
Bracing shall be located between posts parallel to beams and bolted by a minimum 3/8”
diameter through-bolt at each end to the posts as shown. Diagonal bracing shall also be
located perpendicular to beams, and in such cases, bracing shall be bolted to the post
and joist above the post location. If the deck is free-standing, diagonal bracing must be
provided on all the posts and in both directions. Bracing shown in figure 14 is required
in every bay between posts for decks with joist spans up to 8 feet. Decks with joist
spans greater than 8 feet require an engineered design.
Typical Deck Details revised 2/08 Page 17 of 27
Attachment to House: Lateral support is provided for one-half of the deck by the
attachment of the deck rim joist to the existing house as shown in Figure 15 (the beams
and posts furthest from the house still require the diagonal bracing as shown in Figure
14). The existing exterior wall must have sheathing consisting of structural wood panels
with a minimum thickness of 3/8", and the fasteners shall attach to an existing band
board or wall stud. The deck rim joist may also attach to a concrete wall, but not to a
brick veneer. You must verify this condition in the field prior to utilizing this
method. Fasteners shall be 16" on center and must penetrate existing wall studs. See
also the provisions noted on page 11. Flashing over the rim joist is required and must
be installed in accordance with the flashing provisions noted on page 11.
REMOVE SIDING AT
RIM JOIST LOCATION
PRIOR TO INSTALLATION
EXTERIOR SHEATHING
IIII
MIN. THICKNESS f 3/8' CONI INUOUS FLASHING
EXISTING WALL .
WITH DRIP EDGE
FASTENERS @ 16"O.C. f.
SEE TABLE 5 -41111111et,
III
Figure 15—Attachment to House Lateral Support
Table 5
Attachment to House
Joist span Required Fasteners to each Stud
or 16 inches o.c. max.
0'<span< 8' (3)#10 x 4 wood screws
8'<span < 10' (4)#10 x 4 wood screws
10'<span < 14' (6)#10 x 4 wood screws
14'< span < 16' (6)#10 x 4 wood screws
JOIST HANGERS
Joist hangers, as shown in Figure 16, shall r
have a minimum capacity of 1,000 pounds. 111111iiii
Joist hangers used shall be manufactured for
their intended lumber size. Joist hangers shall
II 0 k
be galvanized with 1.85 oz/sf of zinc (G-185
coating) or shall be stainless steel.
Figure 16-Typical Joist Hangers
Typical Deck Details revised 2/08 Page 18 of 27
Joist-to-Beam Connection: Each joist shall
... F., n kdce vi m°`�"'"�'�"t, be attached to the beam as shown in Figure
sy fk instalFM in
Feu of toe-na�7s
��`, ��>, 17. Mechanical fasteners shall be galvanized
with 1.85 oz/sf of zinc (G-185 coating) or shall
MI= be stainless steel.
Figure 17-Joist-to-Beam Detail
Rim Joist
Requirements: Attach a r__SECURE DECKING TO
continuous rim joist to % TOP Of RIM JOIST
the ends of joists as '' `Tk '� "M
JOISTSt WOOD SCREW E"0.C.
shown in Figure 18. '--,�
Please note that the rim .
joists are required at o
both ends of joists
associated with free- N
standing decks. — ATTACH RIS JOIST TO
END OF EACH Jos,'Minimum rim joist le N-.. WITH 5.010 x 3'MIN
dimensions shall be j/ SCREWS
equal to the dimensions l RIS`'J°'sT
of the joist.
Figure 18-Rim Joist Connection
Built-Up Beam 10d nail or#10
Requirements: ,,,d screw,typ. 2-fasteners,each end
Built-up beams -
shall be • •
assembled
in accordance
with Figure 19. x„
The nailing typ. typ.
pattern shall be Figure 19-Built-Up Beam Detail
staggered as
shown.
POST-TO-BEAM REQUIREMENTS
The post-to-beam connection shall be made with premanufactured mechanical
connectors. Mechanical connectors shall be galvanized with 1.85 oz/sf of zinc (G-185
coating) or shall be stainless steel as shown in Figure 20. Post-to-beam connections
may also be accomplished using a minimum 4x6 post notched for a 4x beam as shown
in Figure 21. All thru-bolts shall have washers at the bolt head and nut.
Typical Deck Details revised 2/08 Page 19 of 27
2"MIN. },
(2)2X BEAM \ _1�3' 2-112"DIA.THRU
; j (2)2X BEAM •. >-- BOLTS AND
'Vtk 11 " 47 P#' WASHERS
POST TO BEAM ., 12 MIN _�__-
CONNECTOR j._
----4 X d INN 4X6 MIN. - � NOTCH POST TO
ACCOMODATE BEAM
Figure 20-Post-to-Beam Requirements Figure 21 -Post-to-Beam Requirements
FOOTINGS
See Table 2 or 3 for footing `
size and footing thickness and PRE-MANUFACTURED
Figure 22 for post attachment r CAST-1N-1N
All footings 6"MIN_ "�1 POST ANCHOR
shall bear on solid ground. .-: .
•Bearing conditions shall be -'
•
verified in the field by your
local jurisdiction during the
footing inspection, prior to 16"SQUARE OR
placement of concrete. 18" DIA. ROUND
Footings closer than 3'-0" to
the existing exterior house Figure 22-Typical Footing Detail
wall must bear at the same
elevation as the existing wall footing. Do not construct footings over utility lines or
enclosed meters. Call 1-800-332-2344 before you dig.
Premanufactured post anchors shall be galvanized with 1.85 oz/sf of zinc (G-185
coating) or shall be stainless steel. Post anchors shall be capable of supporting a
minimum of 3,000 pounds. Where bracing is required by figure 14, the post anchors
must be rated for horizontal (seismic) forces. Footings must extend below the frost
depth for your area. See Table 4 for the frost depths in your county. Footings for
freestanding decks (those not attached to the house) are not required to be placed
below the frost line. Footings for freestanding decks may reduce the footing thickness
to a minimum of eight inches.
Note: Footings for decks constructed according to this handout shall not be
placed on ground with a slope greater than 2 horizontal for every 1 vertical.
Footings adjacent to the top of a retaining wall must be set-back from the top of
the wall a distance equal to the height of the wall, or be placed below grade an
amount equal to the height of the retaining wall.
Typical Deck Details revised 2/08 Page 20 of 27
GUARDRAIL REQUIREMENTS
Decks less than 30" above grade are not required to have a guardrail; however, if one is
installed, you must follow these requirements. All decks and stairways over 30" above
grade require guardrails. All guardrails shall be constructed in strict conformance with
the figures herein; any deviations require a plan submission.
4 X 4 POST, TYP, 1, 4'-0" MAX SPACING 2 X 2 PICKET, TYP.
DO NOT NOTCH f 2 X 6 OR 5/4 BOARD
,
t RAIL CAP
\
--:--:_-: :L_.__-__-__•__-__•__•__ : --: J:L-:--
o
M 2 2X4ATTOP
eTh
. . .//
OPENINGS SHALL NOT ATTACH PICKETS AT TOP
SEE GUARD POST ALLOW THE PASSAGE AND BOTTOM WITH
ATTACHMENT DETAILS OF A 4" DIA SPHERE 2-#8 SCREWS OR 2-8d
SPIRAL SHANK NAILS EACH.
Figure 23—Typical Guardrail Detail
Any prefabricated wood, plastic, or manufactured guardrail system purchased from a
home center store, lumber company, or somewhere similar will also require a plan
submission. The guardrail shall be designed to withstand a concentrated load of 200
pounds anywhere along its length, and the infill area is designed to withstand a load of
50 pounds on a square foot area.
Guardrail Post Attachment: There are three options for guardrail attachment provided,
you may choose one that suites your needs or provide a design for approval. Guardrail
posts shall be spaced per Figure 23 and attached per Figures 24, 25 or 27 and 26, 29.
Note: 2x8 minimum joists are required for Figures 24 and 25, and minimum 2x10
joists for Figure 27.
Holdowns, tie plates, bolts, nuts and washers must be hot dipped galvanized with 1.85
oz/sf of zinc (G-185 coating) or shall be stainless steel. Look for products such as
"Zmax" from Simpson Strong-Tie or "Triple Zinc" from USP.
Typical Deck Details revised 2/08 Page 21 of 27
4X4 POSTS(PICKETS — SIMPSON HD2A HOLDOWN
&RAILS NOT SHOWN W/(2)5/8"DIA.GALV.
FOR CLARITY) -- THROUGH BOLTS W/
DECKING— A WASHERS Al FAR SIDE
ire.+`.=`.►=4 (2)5/8" DIA. GALV. THROUGH
1 1/2"MIN. !;T' (�I BOLTS W/WASHERS
1 1/2"MIN. � -!!-��t�1�
AM
(3) 16d NAILS AT EACH JOIST
2. X 8 MIN. 2 X 8 RIM JOIST
DECK JOISTS
POST ON OUTSIDE
Figure 24—Guardrail Attachment Option 1
4X4 POSTS(PICKETS SIMPSON HD2A HOLDOWN
&RAILS NOT SHOWN W/(2) 5/8" DIA.GALV.
FOR CLARIIY) f --- THROUGH BOLTS VW
DECKING / WASHERS AT FAR SIDE
(2)5/8" DIA. GALV.THROUGH
1 1/2" MIN. 'miry& f, BOLTS W/WASHERS
1 1/2"MIN. C arm).11 _ (3)3"STAINLESS STEEL
SCREWS ATJOIST EACH JOIST
2X8 .
DECK JOISTS
X 8 RIM
DECK OISTS
RIM JOIST ON OUTSIDE
Figure 25—Guardrail Attachment Option 2
Typical Deck Details revised 2/08 Page 22 of 27
4X4 POSTS(PICKETS - SIMPSON HD2A HOLDOWN
&RAILS NOT SHOWN W/(2)5/8"DIA,GALV.
FOR CLARITY) -- THROUGH BOLTS WI
Aooi WASHERS AT FAR SIDE
DECKING—
►�., (2)5/8"DIA. GALV.THROUGH
BOLTS W/WASHERS
�� et mai{
7 j9 Ni
- 2 X 8 MIN. RIM JOIST
2 X 8 MIN. 2X BLOCKING W/SIMPSON A34
DECK JOISTS FRAMING ANGLE AT EACH SIDE AT
EACH END(4 TOTAL)
POST SUPPORTED ON PARALLEL FRAMING
Figure 26-Guardrail Attachment Fraiming Parallel to Framing
2 X 6 TOP RAILING
CONNECT 10 POST
W(2)#10 X 3"WOOD 2X2 PICKET@51/2"O.0 MAX.
SCREWS(MAY BE -- I ATTACH PICKETS AT TOP AND
FLAT OR VERTICAL) e BOTTOM W/(2)#8 WOOD
7 X 4 BOTTOMSCREWS OR (2)8d SPIRAL
RAILING.CONNECT SHANK NAILS EACH.
TOPOSTWI(2) 4 X 4 POST
#10 X 3"WOOD - 2-1/2"DIA.THROUGH
SCREWS A-A ` BOLTS WI OVERSIZED
4" MAX WASHER. (1 112"DIA,MIN.)
1 IN. '.‘1i I/ =ii 1 1/2"
A ## �i6 A
1" MIN.-- •
1 114" L6 X 3 X 1/4 X 0'-8"
_-2 X 10 MIN. \ STEEL ANGLE W/(2)
x-3/4"DIA.THROUGH
BOLTS W/(2)VERTICAL.
SHORT SLOTTED HOLES
Figure 27-Guardrail Attachment Option 3
Typical Deck Details revised 2/08 Page 23 of 27
(2)3/4"DIA.
THROUGH BOLTS
dm /— 4 X 4 POST
—7 2X 10JOESTOR I _
2 X 10 BLOCKING W/SIMPSON A34
FRAMING ANGLE AT EACH SIDE AT
EACH END. (4 TOTAL) 2 X 10 RIM JOIST
SECTION A-A
Figure 28-Guardrail Attachment Section for Option 3
2 X 6 TOP RAILING
CONNECT TO POST
W(2)#10 X 3"WOOD -- 2X2PICKET
SCREWS ( RAILING MAY B _._E MAX.FLAT OR VERTICAL) L 51/2`O.C. MAX
ATTACH PICKETS
2 X 4 BOTTOM ? AT TOP AND BOTTOM
RAILING.CONNECT 2 W/(2)#8 WOOD
TO POST W/(2) SCREWS OR(2)8d
#10 X 3"WOOD ♦ SPIRAL SHANK
DECKING SCREWS A NAILS EACH.
4 X 4 POST
0. -mit
DECK
FRAMING
SEE GUARD POST—'
ATTACHMENT DETAILS
Figure 29-Guardrail Railing and Picket Detail
Typical Deck Details revised 2/08 Page 24 of 27
STAIR REQUIREMENTS
Stairs, stair stringers, and
TREAD WIDTH SHALL
NOT DEb7ATE FROM RISER MAY es OFEN stair guardrail shall meet the
ONE ANOTNER ITV RUT
sit WI nlltNv requirements shown in Figure
MORE THAN 313 THE PASSAGE OF A
CDASPHERE 30 through Figure 36. All
stringers shall be minimum
5r IAIN
-f-4%-e 2x12. A level landing
8'MAT.RISEA 'WIDTH }� minimum 3 feet by3 feet is
HF1GIfrSF!A mINT -- RISERS 1X MATER:AI MIN
DEvLATEFSIirMONE required at the top (usually
TTA;S ER e.`MORE this is the deck) and at the
-lY1—314'TO 1 1/7 NOSING bottom (usually a concrete
NOSING SIIALLNO7 ad of the stairway.
DEVIATE FROM ONE pad) Y
ANOTHER eV MORE
I HAN 3ET
Figure 30-Tread and Riser Detail
f
f
s:
4, i • --'A.".-'-----;„.1.,,"''''''- ---'-' I
i
y
MAX SPAN=8'-0'W 2 STRINGERS MAX SPAN=15'$ l
MAX SPAN=1O-T W 3 STRINGERS )'
CUT STRINGER SOLID STRINGLIT
Figure 31 —Stair Stringer Requirements
attach 2x tread material ad stringer
248 screws or 2-8d nails per
2x material board at each stringer
or ledger
iiitimimaimilmimmimit �
1:111.1M� f� iji ��
1 1 >1 1
stringers 2x4 ledger,each side,full
depth of tread;attach w/
4-10d nails or 88 wood screws
CUT STRINGER SOLID STRINGER
Figure 32—Tread Connection Requirements
Note: The stair design in this document is for a three-foot wide maximum stairway with
minimum 2x tread material. Plastic or composite decking products may be used for stair
treads; however, they may require additional stair stringers for bracing. Check with the
manufacturer's requirements.
Typical Deck Details revised 2/08 Page 25 of 27
5' max.
-0"
between posts
stair guardrail required
�a�sefor stairs with a total
rise of 30`or more 1111
e TYPICAL GUARDRAILDETAILS for more
information
stair ��,
guardrail height: j�_
34 measure from0111-
nosing of step / ��
triangular opening shall not
niPpermit the passage of a 8-
diameter sphere
Figure 33—Stair Guard Requirements
BAND BOARD
OR OUTSIDE JOIST
mom 7.146.
SLOPED HANGER
OR LS50 EACH SIDE
Figure 34—Stair Stringer Connection Detail
STAIR HANDRAIL REQUIREMENTS
All stairs with four or more risers shall have a
handrail on one side. Handrails shall be graspable
and shall be of decay-resistant and/or corrosion- a 1/2 max
IIII
resistant material. See Figure 35. The hand grip 1-1n"min
portion, if circular, shall be between111
1%" and 2" in cross section. Shapes other than ���- - handrail
circular shall have a perimeter dimension I`
between 4" and
not greater than 6%" with a corrosion-resistant
maximum cross sectional dimension of 2%". All handrail hardware
shapes shall have a smooth surface with no sharp Figure 35—Handrail Requirements
corners. Handrails shall run continuously from a point directly over the lowest riser to a
point directly over the highest riser and shall return to the guard at each end. See
Figure 36. Handrails may be interrupted at guardrail posts only at a turn in the stair.
Typical Deck Details revised 2/08 Page 26 of 27
. M
= R L
_ __ lawarm roam. omn.
0 O �
I 111 !K!" !L
CO O
D CI)O Z
M Z
r 1 _ _ - ,
HANDRAIL ---0
HANDRAIL SHALL
RETURN AT
EACH END
-- 4x4 PT POSTS
EMBEDDED IN
CONCRETE
T
" MAX SPAN '_ BETWEEN 'A ;.
• r _'.,._ TRINGERS
FOOTING: 12" x 12"
Figure 36—Miscellaneous Stair Requirements
FRAMING AT CHIMNEY OR BAY WINDOW
All members at a chimney or bay window shall be framed in accordance with Figure
37. Headers with a span length greater than 6'-0" require a plan submission.
6'-0"maximum [—,.] decking may
extend 6"max.
/
chimney 'Ise °.1
/ chimney or / Of ba
4
bey window le er win w X)(_)
ik
r 11
double joist) d ouble 1 joist \double header 2-1/2"dla.btu-bolt
each side hanger,typ. I or lag screws at ledger
PLAN SECTION
Figure 37-Requirements for Framing at Chimney or Bay Window
Typical Deck Details revised 2/08 Page 27 of 27
FOR OFFICE USE ONLY—SITE ADDRESS: /4 / 76 S4(-) /4)-'772/<211Z-.-E--
This
)- /<21 �-
This form is recognized by most building departments in the Tri-County area for transmitting information.
Please complete this form when submitting information for plan review responses and revisions.
This form and the information it provides helps the review process and response to your project.
City of Tigard • COMMUNITY DEVELOPMENT DEPARTMENT
'PI Transmittal Letter
I c A Iz n 13125 SW Hall Blvd. • Tigard, Oregon 97223 • 503.718.2439 • www.tigard-or.gov
TO: pn\ DATE RECEIVED:
DEPT: BUILDING DIVISION RECEIVI)ti
aZ�
AUG 2,4017
FROM: :���C Af/r1W5
CITY OF TIGARD
COMPANY: Ait ite,Lvf La,t$-
BUILDING IVIS
PHONE: -7 6/6 - 4/3). By:
RE: /.2 Q)c S J /74 r Sj` ab-O '7
(Site Address) Permit Num
I 11 � ' d4'
(Prori�m-a or subdivision name and lot num )
ATTACHED ARE THE FOLLOWING ITEMS:
Copies: Description: Copies: Description:
Additional set(s)of plans. Revisions:
Cross section(s) and details. Wall bracing and/or lateral analysis.
Floor/roof framing. Basement and retaining walls.
Beam calculations. Engineer's calculations.
Other(explain):
REMARKS: c_ 4/te41 d..e...4,/,/-„_/4 J '8 1- ''s
.5.,C. G res.b;. :-- ..s.44,181.... Dec k 0e e.: 1_S
FOR OFFICE USE ONLY
Routed to Permit Technician: Date: g 30 - Initials: -f
Fees Due: TZ Yes ❑No Fee Description: Amount Due:
. S .Hr p1 ,h r...,J : e✓ $ y.s--
M2 ,°z'1, $ /7,&aP
/9-bo ''c /9-,1 2 vw $ //. 9
/2.04 5 e,e-c -- $ 2 , /..2-
Special e*s2SL 707 -c. ,c6--t ' 7(0, 01 9
Instructions:
Reprint Permit(per PE): Yes ❑No a 1 on:i
Notified: Da /-
��G� �/��//? Initials: _-0.----
Applicant �r
I:\Building\Forms\TransmittalLetter-Revisions_061316.doc