2012, 11-09 Permit App BLD-2012-2053 Extend DeckCommunity Development Department
Permit Center
11703 East Sprague Avenue, Suite B-3
Spokane Valley, WA 99206
Tel: (509) 688-0036
Fax: (509) 688-0037
permitcenter@sookanevalley.orci
(Staff Use Only)
PERMIT NUMBER:
PERMIT FEE:
RESIDENTIAL CONSTRUCTION PERMIT APPLICATION
111 NEW CONSTRUCTION E] ADDITION/REMODEL
DECK ❑ OTHER
SITE ADDRESS: g /3 n. C arb�vl C
ASSESSORS PARCEL NO.:
BUILDING OWNER NAME:
ACCESSORY BUILDING
Project # j.)C(- -20\2 - Z033
LEGAL DESCRIP' ION:
RECEIVED
r'/ 2012
NAME: non o k .U4VSY1& Q'Leav"(%�
ADDRESS: g/3 .? Calf 131'Vt C �f
CITY: Greavt.o..cv' ES
PHONE: S.09 - 7.Z:''`IS 96"--
CONTACT NAME:
FAX:
STATE:
CSV PERMIT CENTER
SUB # REV. #
—2IP CJ
CELL: To `8? S o S'2,
PHONE:
FAX: CELL:
CONTRACTOR NAME:
MAILING ADDRESS: 73 / 3 G Krdjiv e
CITY: S,poiCQvte_ Jallej STATE: ZIP: °. 7 ZI
A�1
PHONE: i/ FAX: /VA- CELL: Spg - 343 a $
CONTRACTOR LICENSE NO.: /1/4. EXPIRES: //4, CITY BUSINESS LICENSE NO.: •ii/i4
DESCRIBE THE SCOPE OF WORK IN DETAIL AND ttINDICATE USE & PROPOSED USE:
Peek. ex/ert.sio✓ ., erJo - e eX16i'v, deck. For hovneok.,/rlevs use.
****YOU MUST COMPLETE THE FOLLOWING****
MARK N/A IF NOT APPLICABLE
Height to Peak:
Dimensions:
No. of Stories:
Total Habitable
Space:
Main Floor SQ FT:
Upper Floor SQ FT:
Unfinished Basement SQ
FT:
Finished Basement SQ
FT:
Garage SQ FT:
Deck/Covered Patio SQ
FT: f 80
Impervious Surface
Area:
30% Slopes on
Property:
No. of Bedrooms:
Construction Type:
Heat Source:
Sewer or Septic:
TOTAL COST OF PROJECT: $ 3dQO-
DISCLAIMER
The permitted verifies, acknowledges and agrees by their signature that: 1) if this permit is for construction or on a dwelling, the dwelling is/will
be served by potable water. 2) Ownership of this City of Spokane Valley permit inure to the property owner. 3) The signatory is the property
owner or has permission to represent the property owner in this transaction. 4) All construction is to be done in full compliance with the City of
Spokane Valley Development code. Referenced codes are available for review at the City of Spokane Valley Permit Center. 5) The City of
Spokane Valley permit is not a permit or approval for any violation of federal, state or local laws, codes or ordinances. 6) Plans or additional
information may be required to be submitted and subsequently approved before this application can be processed.
Signature,, -iv, A �. L
Date: :De
Updated 1-11-11 Page 1 of 1
http://www.spoka nevalley.org/filestorage/124/938/210/948/1496/Building_ Permit_-_Residentia l_11-11-11.doc
RESIDENTIAL CHECK LIST DIRECTIONS:
Place a check mark in box next to each document required for complete submittal.
o SITE PLAN
o Property lines and dimensions
o Direction arrow pointing North and orientation to streets
o Proposed/existing buildings (footprint and dimensions)
o Utilities, septic tank/drain field locations and distances
o Setbacks to property lines
o Distance between buildings
o Right of way/easement location & sizes
o Driveway approach size and location
BUILDING PLANS (3 SETS) (minimum 1/8 inch scale or completely dimensioned)
❑ Elevations (Front/Rear/Sides) with roof peak and wall height including basement:
❑ Foundation Plan (crawlspace, basement or slab on grade):
o Footing sizes and locations
o Perimeter concrete foundation wall sizes
❑ Crawsspace ventilation
o Supporting wood cripple walls or beams
o Thickened concrete pads supporting
beams or girder trusses
❑ Floor Plan of each level (finished or unfinished) with dimensions:
o Floor Joist direction, size and spacing
o Header, beam or concrete lintel sizes
o Brace wall panel locations
o Water heater and furnace locations
o Exhaust fan locations
o Deck or concrete patio sizes and locations
❑ Roof Plan:
o Engineered truss direction and spacing
o Rafter and over frame direction, size and spacing
❑ Wall Section Detail including:
Roof
o Slope/ roofing material/ underlayment/ ice dam protection
o Sheathing size and type
Ceiling
o Joist size and spacing
Wall
o Height/ top plate/ stud size and spacing/ sole plate
o Exterior sheathing size and type
Floor
o Joist size and spacing
Foundation Wall
o Concrete or Masonry unit width
o Earth to wood separation distance
Footing
o Size
Radon
o Passive system with 6mil vapor barrier
Miscellaneous Construction Details
❑ Deck:
o Floor plan/ side view/ dimensions
o Floor Joist/ decking direction, size and spacing
❑ Stairway tread rise & run and nosing
o Window and door location and sizes
o Window well locations if applicable
o Room usage labels
o Smoke detector locations
o Attic and crawl space access locations
o Fire Wall construction
o Ridge, eave and valley lines
o Beam and girder size and location
o Truss or rafter size, spacing & connection
o Attic insulation/ air space baffle/ ventilation
❑ Size of ceiling gypsum wall board
o Siding/ exterior house wrap/ anchor bolts
o Insulation, vapor barrier, gypsum wall board
❑ Sheathing or concrete floor size/ insulation
o Footing bottom to finished ground level depth
o Horizontal & vertical reinforcement if any
o Reinforcement if any
❑ Active system with 6 mil vapor barrier
❑ Footings/ post/ and beam size and locations
O Handrail / Guard height & spacing
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DECKING REQUIREMENTS
All decking material shall be composite or dimension
lumber (2"nominal thickness) or span rated decking in ac-
cordance with the American Lumber Standard Committee
Policy for Evaluation of Recommended Spans for Span Rated
Decking Products (November5, 2004). Attach decking to each
joist with 2-8d threaded nails or 2-#8 screws. Space decking
boards approximately 1/8"apart. See Figure II for decking
connection requirements at the rim joist. Decking may be
placed from an angle perpendicular to the joists to an angle
of 45 (reduced joist spacing may be required). Each segment
of decking must bear on a minimum of joists (or4 sup-
ports).
Decking not meeting these requirements may be substi-
tuted when the product has been approved by the authority
having jurisdiction.
JOIST SIZE
The span of a joist is measured from the centerline of bear-
ing at one end of the joist to the centerline of bearing at the
other end of the joist and does not include the length of the
overhangs. Use Table 1 to determine joist span based on
lumber size and joist spacing. Use Table 1A for wood treated
with pressure perservatives. See Figure IA through Figure 2
for joist span types.
FOR USE WITH NON -PRESSURE TREATED WOOD
Table 1. Joist Span
DEAD LOAD = 10 psf
JOIST SPACING
(inches)
SPECIES
SIZE
WITHOUT OVERHANGS'
I WITH OVERHANGS UP TO Li/42
12
16
24
12
16
24
(ft-in.)
(ft-In.)
(ft-in.)
(ft-in.)
(ft-in.)
(ft-in.)
2x6
10-9
9-9
8-1
8-6
8-6
8-1
Douglas Fir
2x8
14-2
12-7
10-3
10-9
10-9
10-3
-Larch
2x10
17-9
15-5
12-7
15-5
15-5
12-7
2x12
20-7
17-10
14-7
20-7
17-10
14-7
2x6
10-0
9-1
7-11
8-3
8-3
7-11
Hem Fir
2x8
13-2
12-0
10-2
10-8
10-8
10-2
2x10
16-10
15-2
12-5
15-2
15-2
12-5
2x12
20-4
17-7
14-4
20-4
17-7
14-4
2x6
10-9
9-9
8-6
9-0
9-0
8-6
2x8
14-2
12-10
11-0
11-7
11-7
11-0
Southern Pine
2x10
18-0
16-1
13-1
16-1
16-1
13-1
2x12
21-9
18-10
15-5
21-9
18-10
15-5
2x6
10-3
9-4
8-1
8-6
8-6
8-1
Spruce -Pine -Fir
2x8
13-6
12-3
10-3
10-9
10-9
10-3
2x10
17-3
15-5
12-7
15-5
15-5
12-7
2x12
20-7
17-10
14-7
20-7
17-10
14-7
1 Assumes 40 psf live load, 10 psf dead load, I/360 defelction, No. 2 grade, and wet service conditions. See Figure 1 B.
2 Assumes 40 psf live Ioad, 10 psf dead Toad, L/180 cantilever deflection with 220 lb point load, No. 2 grade, and wet service conditions.
See Figure 1A and 2.
-3-
FOR USE WITH PRESSURE TREATED WOOD
Table 1A. Maximum Joist Spans (Li/42)
Joist Spacing (o.c.)
Without OverhangsWith Overhanges up to Li/42
Species Size 12" ' 24" 12" 16" 24"
2x8
13'-8" 12'-5" 10'-2"
10'-9"
10`-9" 10'-2"
Southern Pine 2x10 17'-5" 15'-10" 13'-1"
15'-6"
15'-6" 13'-1"
2x12 18'-0" 18'-0" 15'-5"
18,-0"
18'-0" 15'-5"
Douglas Fir -Larch, Hem -Fir,
SPF3
12'-6" 9'-1"
9'-5"
9'-5" 9'-1"
2x10 15'-8" 13'-7" 11'-1"
13'-7"
13'-7" 11'-1 °
2x12 18'-0" 15'-9" 12'-10"
18'-0" 15'-9" 12'-10"
Redwood, Western Cedars,
Ponderosa Pine*, Red Pine4
2x8 11'-8" 10'-7" 8'-8"
8'-6"
8'-6" 8'-6"
2x10 14'-11" 13'-0" 10'-7"
12'-3"
12'-3" 10'-7"
2x12 17'-5" 15'-1" 12'-4"
17'-5"
15'-1" 12'-4°
Assumes 40 psf live Ioad,10 psf dead load,1/360 defelction, No. 2 grade, and wet service conditions. See Figure 1 B.
2 Assumes 40 psf live load, 10 psf dead load, L/180 cantilever deflection with 22016 point load, No. 2 grade, and wet service
conditions. See Figure 1 A and Figure 2.
Incising assumed for refractory species including Douglas fir -larch, hem -fir, and spruce -pine -fir.
4 Design values based on northern species with no incising assumed.
Figure 1 A. Joist Span - Deck Attached at House and Bearing Over Beam
optional overhang existing wall —•--
---3c—]C—`7C--3I"-1i--ir—lrr--il—li—Ir—il—if--ii---Ir--li—it—
rim joist joist hangar—»
beam (flush,--•�-
tight bearing) V_
post
CJ/4 maximum
kw -
overhang
Aut
joist
pressure treated
ledger boar
JoistSpan (Li): see Table 1, 1A
Figure B. Post -to -Beam Attachment Requirements
(1) 3x or 4x or
(2) 2x beam
beam must
bear fully on
6x6 notch
6x6 min. —
(2) 1/2"diameter
thru-bolts
with washers
notch post to
accomodate beam
RIM JOIST REQUIREMENTS
Attach a continuous rim joist to the ends ofjoists as shown
in Figure 11. Attach decking to the rim joist as shown in
Figure 11. For more decking attachment requirements, see
DECKING REQUIREMENTS.
Figure 9. Prohibited Post -to -Beam Attachment
Figure 10. Alternate Approved Post -to -Beam Post Cap
Attachment
Solid sawn or
_multi -ply beam
'tii
Figure 11. Rim Joist Connection Details
joists
rim joist
secure decking to top of rim joist with
10d threaded nails or #10 x 3"
minimum wood screws @ 6"o.c.
common or smooth nails are not permitted
attach rim joist to end of each joist with
(3) 10d threaded nails or (3) #10 x 3"
minimum wood screws
common or smooth nails are not permitted
-9-
FOOTINGS [R4031
See Figure 12 and Table 4 for footing size, footing thickness, Table 4. Footing Sizes'
and post attachment options and requirements. Beam Joist Round Square
All footings shall bear on solid ground and shall be placed Span, Span, Footing Footing Footing
at least 12 inches below the undisturbed ground surface or Le La Diameter Dimension Thickness
below the frost line, whichever is deeper.
Contact the authority having jurisdiction to determine the 510' 15" 13" 6"
specified frost line. Bearing conditions shall be verified in 6' 514' 17" 15" 6"
the field by the building official prior to placement of con-
crete. Where the building official determines that in -place 518' 20" 18" 7"
soils with an allowable bearing capacity of less than 1,500 510' 17" 15" 6"
psf are likely to be present at the site, the allowable bearing
capacity shall be determined by a soils investigation. DECK 8' 514' 20" 18" 8"
FOOTINGS CLOSER THAN 5'-0"TO AN EXISTING EXTERIOR 518' 23" 21" 9"
HOUSE WALL MUST BEAR ATTHE SAME ELEVATIONS ASTHE <_10' 19" 17" 7"
FOOTING OF THE EXISTING HOUSE FOUNDATION.
Do not construct footings over utility lines or enclosed
meters. Contact local utilities (calf 811) befor digging.
Pre -manufactured post anchors shall be galvanized. See
MINIMUM REQUIREMENTS.
10' 514' 22" 20" 9"
518' 25" 23" 10"
510' 21" 19" 8"
12' 514' 24" 22" 10"
518' 28" 26" 11"
510' 22" 20" 9"
14' 514' 26" 24" 11"
518' 30" 28" 12"
510' 24" 22" 9"
16' 514' 28" 26" 12"
518' 32" 30" 13"
510' 25" 23" 10"
18' 514' 30" 28" 12"
518' 34" 32" 14"
' Assumes 1,500 psf soil bearing capacity.
' Assumes 2.500 psi compressive strength of concrete. Coordinate foot-
ing thickness with post base and anchor requirements.
Figure 12. Typical Footing Options
Pressure Treated Post
grade
111=I �
check with Building
Department for
minimum frost depth
requirements
frost depth
posts must be
centered on footing
1=111=
11E11
per Table r
•
•
I
1r
c!J
"14
I
Cut ends of posts shall be field
treated with an approved
preservative (such as copper
naphthenate)
4
footings must bear
on solid ground
pre -manufactured post base
with post anchor, or poured
in place footing per Table 4.
Where soil conditions allow,
soil forms may be allowed.
-10-
LEDGER ATTACHMENT REQUIREMENTS (R502.2.21
GENERAL: Ledger boards shall be pressure treated
material. Attach the ledger board, which shall be equal to
or greater than the deck joist depth but less than or equal
to the rim joist depth, to the existing exterior wall in accor-
dance with Figure 14through Figure 16. When attachments
are made to the existing house band joist, the band joist
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 either a free-standing deck or full plan
submission is required. See FREE-STANDING DECKS.
SIDING AND FLASHING: House siding or the exterior finish
system must be removed prior to installation of the ledger
board. Approved corrosion resistant flashing is required at
any ledger board connection to a wall of wood framed con-
struction (see MINIMUM REQUIREMENTS). See Figure 14for
continuous flashing with drip edge. The threshold shall be
carefully flashed and caulked to prevent water intrusion due
to splash from the deck or melting snow and ice.
MANUFACTURED WOOD I-JOIST:The term "I -Joist" denotes
manufactured wood"I"joists (see Figure 13A). Many new
Figure 13A. Wood I -Joist Profile
FRAMING AT CHIMNEY OR BAY WINDOW
All members at a chimney or bay window shall be framed in
accordance with Figure 5. Headers may span a maximum
of 6`- 0". When a chimney or bay window is wider thant
6-0 , one or more 6x6 posts may be added to reduce header
spans to less than 6'-0': In such cases, the post footing must
meet the requirements in the FOOTINGS section. Headers
with a span length greater than 6'-0"require a plan submis-
sion. Headers shall be located no more than 3'-0"from the
end of the trimmer joist.
Triple trimmer joists are required on each side of the header
ifjoist spacing is 12"or 16" o.c. or if the trimmer joist span
exceeds 8'-6"; otherwise, double trimmer joists are permit-
ted. Trimmer joists may bear on the beam and extend past
the beam centerline up to L14 as shown in Figures 1A and 2,
or the trimmer joist may attach to the side of the beam with
joist hangers as shown in Figure 1 B. Joist hangers shall each
have a minimum download capacity in accordance with
Table 5. Bolts or lag screws used to attach the hanger to the
ledger shall fully extend through the ledger into the 2-inch
nominal lumber band joist (1-1/2"actual) or EWP rim board.
Otherwise a freestanding deck is required.
homes constructed with wood I -joists include 1" or thicker
engineered wood products (EWP)such as oriented strand
board (OSB) or structural composite lumber (SCL) includ-
ing laminated veneer lumber (LVL) - as band joists (or rim
boards) that can support the attachment of a deck (see Fig-
ure 14). However, some older homes might be constructed
with band boards that are too thin (less than 11 to support
a deck. In such cases, a free-standing deck or a full plan
submission is required.
MANUFACTURED WOOD TRUSS: A metal plate connected
wood truss (MPCWT) is an engineered, prefabricated struc-
tural component designed for each specific application. MP-
CWT's used in residential floors are often installed with a 2x4
lumber"ribbon"at the ends of the trusses (see Figure 13B)
to tie the ends of the trusses together. The ribbon board,
by itself, is not intended to support the deck ledger and
deck. Installing residential decks when the floor system for
the house uses MPCWT requires a standard detail provided
by the truss designer, a free-standing deck, or a full plan
submission. Refer to the WTCATechnical Note -Attachment
of Residential Decks to Wood Truss Floor Systems for special
blocking details and attachment requirements (www.sbcin-
dustry.com) .
Figure 13B. Metal Plate Connected (MPC) Wood Floor
Trusses with a 2x4 Lumber "Ribbon" at the ends of the
Trusses
2x4 RIBBON BOARD - not intended for
deck attachment
#441-7MPC FLOOR
TRUSSES
FOUNDATION WALL
Table 5. Trimmer Joist Hanger Download Capacity
Joist Size
Minimum Capacity, lbs
2x8
1050
2x10
1380
2x12
1500
-11-
Figure 14. General Attachment of Ledger Board to Band Joist or Rim Board
exterior sheathing
existing stud wall
existing 2x band joist
or 1"minimum
EWP rim board
2x floor joist,
wood I -joist,
or MPCWT
existing
foundation wall
2„min.1 Ya!1,
1-5/8" axl MN
5"max !
.2"min.V a1il
�T 1
remove siding at ledger
prior to installation
threshold carefully flashed and
caulked to prevent water intrusion
continuous flashing extend-
ing past joist hanger
deckjoist
1/2"diameter lag
screws or
through bolts with
washers
joist hanger
2x pressure treated ledger board; must be greater
than or equal to the depth of the deckjoist and no
greaterthan the depth of the band joist
Figure 15. Attachment of Ledger Board to Foundation Wall (Concrete or Solid Masonry)
existing concrete
or solid masonry
- A.
wall .
embed anchors per manufacturer recommendations
to resist corrosion and decay, this area
should be caulked
1\._
k—joist hanger
2x pressure treated ledger board;
must be greater than or equal to the
size of the joist
deck joist
1/2"diameter
approved expansion,
epoxy, or adhesive
anchors with washers
Figure 16. Attachment of Ledger Board to Foundation Wall (Hollow Masonry)
embeded anchors
per manufacturer
recommendations
existing hollow
masonry wall
block cells filled
with grout or
concrete at
anchor locations
(new construction)
"block wall
minimum
to resist corrosion and decay,
this area should be caulked
deckjoist
1/2"diameter
approved expansion,
epoxy, or adhesive
anchors with washers
joist hanger
2x pressure treated ledger board;
must be greater than or equal to the
size of the joist
-12-
FREE STANDING DECKS
Decks which are free-standing do not utilize the exterior wall
of the existing house to support vertical loads (see Figure
21); instead, an additional beam with posts is provided at
or within L/4 of the existing house. THE ASSOCIATED DECK
POST FOOTINGS HALL BE PLACED AT THE SAME ELEVATION
AS THE EXISTING HOUSE FOOTING IF LOCATED CLOSER
THAN 5'- 0" TO AN EXISTING HOUSE WALL (see Figure 2 and
Figure 12). For houses with basements, a cylindrical footing
(caisson) is recommended to minimize required excavation
at the basement wall. Beam size is determined byTable 2.
Figure 21. Free Standing Deck
install diagonals
per Figure 22
joist overhang
—existing house
foundaton wall
deck footings must be at
same elevation as existing
house footing
DECK STABILITY
Decks greater than 4 feet above grade shall be provided
with diagonal bracing.
Figure 22. Diagonal Bracing Requirements
post to
beam
bracket
BRACING PARALLELTO BEAM
l
— provide blocking when
joists do not align
with posts
eV
beam
2'
4 •s
joist at post
locations
BRACING PERPENDICULARTO BEAM
14'- 0" maximum
-15-
Diagonal Bracing: Provide diagonal bracing both parallel
and perpendicular to the beam at each post as shown in
Figure 22. When parallel to the beam, the bracing shall be
bolted to the post at one end and beam at the other. When
perpendicular to the beam, the bracing shall be bolted to
the post at one end and a joist or blocking between joists at
the other. When a joist does not align with the bracing loca-
tion provide blocking between the adjacent joists. Decks
attached to the house as shown in Figure 23A do not require
diagonal bracing perpendicular to the house. Diagonal
bracing parallel to the house may be omitted at the beam
adjacent to the house for a free-standing deck attached as
shown in Figure 23.
Free-standing Deck- Attachment to House: Attach the
deck rim joist to the existing house exterior wall as shown
in Figure 23 for a free-standing deck. The wall must be
sheathed with minimum 3/8"wood structural panel sheath-
ing. Use lag screws or thru-bolts when fastening to an exist-
ing band joist or wall stud; use expansion anchors or epoxy
Figure 23. Attachment of Free -Standing Deck to House
for Deck Stability
exterior sheathing
min. thickness = 3/8"
existing wall stud,--a—
band joist, or con-
crete or masonry
foundation wall
fasteners @ 16"o.c.
staggered
remove siding at rim joist
location prior to installation
continuous flashing extending
past rim joist fasten -Fs
rim joist
— -- beam & post--r
anchors when fastening to concrete or masonry. DO NOT
ATTACH TO BRICK VENEERS. VERIFY THIS CONDITION IN THE
FIELD PRIORTO UTILIZING THIS METHOD. Fasteners shall
be 16"on center and staggered in 2 rows for free-standing
decks. Flashing over the rim joist is required and must be
installed in accordance with the flashing provisions in the
LEDGER ATTACHMENT REQUIREMENTS.
Deck Supported by Ledger - Attachment to House:
Where supported by attachment to an exterior wall (Fig-
ures 14,15, or 16), decks shall be positively anchored to the
primary structure and designed for both vertical and lateral
loads as applicable [R502.2.2]. The lateral load connection
required shall be permitted to be in accordance with Figure
23A. Hold down tension devices shall be provided in not
less than two locations per deck, and each device shall have
an allowable stress design capacity of not less than 1,500 lb
[R502.2.2.3].
Figure 23A. Example of a Lateral Load Device for a
Deck Attached to a House with a Ledger
floor sheathing nailing
at 6"maximum on
center to joist with hold
down
hold down or similar
tension device
lit
floor joist —1 deck joist
GUARD REQUIREMENTS
All decks greater than 30"above grade are required to have
a guard [R312.1] - one example is shown in Figure 24. Other
methods and materials may be used for guard construction
when installed according to the manufacturers installation
instruction, or as approved by the authority having jurisdic-
tion. Where a guard is required and fixed seating is provided
the guard height is measured from the top of the fixed seat-
ing.
Figure 24. Example Guard Detail - Best Practice
i
—6'-0"maximum spacing ---�
4x4 post, typical-
2x6 or 5/4 board 2x2 baluster, typical
DO NOT NOTCH
► j Jr rail cap !�
1
36"
minimum.'
I
lE
(2) 1/2"diameter thru-bolts- �YJ �Lopenings shall not allow i attach balusters at top and bottom with
and washers the passage of a 4"diameter (1)#8 wood screw or (2)8d post -frame
sphere threaded nails with 0.123" nominal diameter
2x4 top and bottom;
attach to guard post with
(2)#8 wood screws <_ 2-1/2"
long on inside face.
-16-
GUARD POST ATTACHMENTS
Deck guard posts shall be a minimum 4x4 (nominal) with an
adjusted bending design value not less than 1,100 psi.
Guard posts for guards which run parallel to the deck joists
shall be attached to the outside joist per Figure 25. Guard
posts for guards that run perpendicular to the deck joists
shall he attached to the rim joist in accordance with Figure
26. Only hold down anchor models meeting these mini-
mum requirements shall be used. Hold down anchors shall
have a minimum allowable tension load of 1,800 pounds for
a 36" maximum rail height and be installed in accordance
with the manufacturer's instructions.
Figure 25. Guard Post to Outside Joist Example - Best Practice
*guard posts may be
located on either side
of the outside -joist
guard post
(2) 1/2" dia. thru-
bolts and washers
2"min
2-1/2"min. and 5"max.
2" min.!
outside joist
see Figure 24 for guard
component attachment
requirements
SECTION
`guard posts can be installed
as shown in Figure 26 (between
joists) if blocking is installed as
shown below within 12" of each
side of the post
at first interior bay, provide 2x blocking at guard posts
with hold-down anchors; attach blocking with 10d
threaded nails top and bottom, each side
outside joist
guard post
PLAN VIEW
Figure 26. Guard Post to Rim Joist Example - Best Practice
see Figure 24 for guard
component attachment
requirements
guard post
rim joist
hold-down anchor
joist
minimum (2)1/2"
diameter thru-
bolts and washers
SECTION
2"min.
2-1/2" min. and 5" max.
2"min.
hold-down anchor
joist
align guard
post at joist
locations
rim joist
hold-down anchor
at joist location between joists
PLAN VIEWS
1-guard post
rim joist
-17-
STAIR REQUIREMENTS
Stairs, stair stringers, and stair guards shall meet the require-
ments shown in Figure 27 through Figure 31 and Table 7 ex-
cept where amended by the local jurisdiction. All cutstring-
ers shall be a minimum of 2x12, and solid stringers shall
be a minimum of 2x10. Stair stringers shall not span more
than the dimensions shown in Figure 28. If the stringer span
exceeds these dimensions, then a 4x4 post may be provided
to support the stringer and shorten its span length. An
intermediate landing may also be provided to shorten the
stringer span (see provisions below). If the total vertical
height of a stairway exceeds 12'-0", then an intermediate
landing shall be required. All intermediate stair landings
must be designed and constructed as a free-standing deck
Figure 27. Tread and Riser Detail
10"minimum
tread width
7-3/4" maxim um ;
riser, height shall t
not deviate from 1
one another by I-4
more than 3/8",___ j _.
7 riser may be open, but
shall not allow the
. ` passage ofa4"diameter
\sphere-1
—risers: 1x material,
minimum
" -treads: see Figure 29 and Table 6
—0 =,rj0 3/4 1-1/4"nosing;
nosing shall not deviate
from one another by
more than 3/8"
Figure 29. Tread Connection Requirements
Attchment per tread at each stringer or ledger:
2x or 5/4 treads - (2)8d threaded nails or (2)#8 screws
2-1/2"long
3x_treads - (2) 16d threaded nails or (2)#8 screws
3-1/2"long
stringe
eads: 2x or 5/4 board
stringer
CUT STRINGER
treads: see Table 7
1
q't 1
_/ 36"max. /9 91
2x4 ledgers, each side, full
depth of tread; attach with (4)
10d threaded nails or (4)#8
wood screws z 3"long
SOLID STRINGER
using the details in this document. Stairs shall be a mini-
mum of 36"in width, a combination of cut and solid string-
ers can be used, but shall be placed at a maximum spacing
of 18"on center (see Figure 29). The width of each landing
shall not be less than the width of the stairway served. Every
landing shall have a minimum dimension of36"measured
in the direction of travel and no less than the width of the
stairway served [R311.7).
Figure 28. Stair Stringer Requirements
max. span = 7'-0"for Southern Pine
max. span = 6'-0: for other Table
1, 1A species
CUT STRINGER
max. span = 16'-6"for Southern Pine
a
`
max. span = 13'-0"for other Table
1, 1A species
SOLID STRINGER
Table 7. Minimum Tread Size for Cut and Solid
Stringers'
Species
Cut
Stringer
Solid
Stringer
Douglas Fir Larch,
Hem -Fir, SPF2 2x4 or 5/4 2x6 or 3x4
Redwood, Western
Cedars, Ponderosa Pine3,
Red Pine3
2x4 or 5/4 2x6 or 3x4
' Assumes 300 lb concentrated load, L/288 deflection limit,
No. 2 grade, and wet service conditions.
2 Incising assumed for refractory species including Douglas
fir -larch, hem -fir, and spruce -pine -fir.
3 Design values based on northern species with no incising
assumed.
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