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*THIS SPACING AND SPAN IS
FOR LATTICE PATIO
COVERINGS ONLY.
NOTES:
a.TWO 2X MEMBERS MAY BE SUBSTITUTED FOR ONE 4X HORIZONTAL FRAMING
MEMBER, EXCEPT IN HIGH FIRE ZONE.
DISCLAIMER:
Alternate patio designs may be possible when provided with
an engineered analysis. Use of this conventional standard
design is at the user’s risk and carries no implied or inferred
guarantee against failure or defects.
b.LAG BOLTS MUST FULLY ENGAGE A WOOD STUD OR RIM JOIST AND BE
PROVIDED WITH APPROPRIATE WASHERS. LAG BOLTS SHALL BE LOCATED A
MINIMUM OF 1-½” FROM THE TOP OR BOTTOM OF THE LEDGER.
c.NOT DESIGNED TO BE ENCLOSED - ADDITIONAL ENGINEERING ANALYSIS
WILL BE REQUIRED IF ENCLOSED.
d.SEE PAGE 2 OF 2 FOR CONSTRUCTION DETAILS.
RAFTER SPACING:
SEE TABLE “A”
TABLE "B"
HEADER SIZE & SPANS
(DOUGLAS FIR #2 OR BETTER)
TABLE "A"
RAFTER SPANS
(DOUGLAS FIR #2 OR BETTER)
SIZE SPACING SPAN
TABLE "C"
FOOTING SIZE
BASE ON 1,000
P.S.F. SOIL BEARING
PRESSURE.
TABLE "D"
LEDGER
BOLTING
12' -1"
TO
20' - 0"
18" SQ. X 12" DEEP
18" SQ. X 12" DEEP
18" SQ. X 12" DEEP
18" SQ. X 12" DEEP
ALL LAG BOLTS
SHALL HAVE ¼”
PRE-DRILLED
HOLES (See Note b) SPAN SIZE
2 x 4 12" O.C. 9' -10"
16" O.C. 8' - 11"
24" O.C. 7' - 8"
32" O.C. *6' - 3"
3/8" DIA. X 5"
LONG AT 16" O.C.
STAGGERED
(2) 3/8" DIA X 5" LONG AT 16" O.C.
UP TO
12' - 0"
8'-0" MAX 4 x 6
10'-0" MAX 4 x 8
12'-0" MAX 4 x 10
14'-0" MAX 4 x 12
8'-0" MAX 4 x 8
10'-0" MAX 4 x 10
12'-0" MAX 4 x 12
14'-0" MAX 4 x 14
RAFTER HEADER
SPAN
24" SQ. X 12" DEEP
24" SQ. X 12" DEEP
24" SQ. X 12" DEEP
24" SQ. X 12" DEEP
2 x 6 12" O.C. 15' - 4"
16" O.C. 13' - 9"
24" O.C. 11' - 3"
32" O.C. *9' - 7"
2 x 8 12" O.C. 20' - 0"
16" O.C. 18' - 2"
24" O.C. 14' - 10"
32" O.C. *12' - 8"
2 x10 12" O.C. 20' - 0"
16" O.C. 20' - 0"
24" O.C. 18' - 11"
32" O.C. *16' - 2"
4 x 4 24" O.C. 10' - 0"
32" O.C. *9' - 3"
48" O.C. *7' - 8"
4 x 6 24" O.C. 15' - 11"
32" O.C. *13' - 9"
48" O.C. *11' - 3"
4 x 8 24" O.C. 20' - 0"
32" O.C. *18' - 2"
48" O.C. *14' - 10"
2X2 OR 2X4 @3" O.C. MIN. SPACING
LATTICE OR ½” nominal PLYWOOD
WITH BUILT-UP OR ROLL ROOFING
SIMPSON (OR EQUAL)
POST CAPS OR
"T" STRAP EACH SIDE
½” DIA. THRU BOLTS
OR 16d NAILS
2X SOLID BLOCKING REQUIRED FOR
ALL SOLID PATIO COVERS W/ MIN (3)
16d TOENAILS TO HEADER, OR A-34
OR EQUAL FRAMING ANGLES
24"
MAX.
OVERHANG
KNEE BRACE:
SEE FRAMING
DETAILS (PG. 2)
HEADER SPAN & SIZE:
SEE TABLE “B”
CLEARANCE:
6' - 8" MIN.
8' - 0" MAX.
RAFTER SPAN & SIZE SEE TABLE "A"
EXISTING WOOD
STUD WALL
ROOF SLOPE: ¼" PER FOOT MIN.
3 ½" CONCRETE
SLAB TYPICAL
LEDGER: SEE TABLE “D” &
FRAMING DETAILS (PG. 2)
24"
MAX.
OVERHANG
SLOPE
SIMPSON H2.5A (OR EQUAL)
HURRICANE CLIPES @ 48" O.C.
EDGE NAIL PLYWOOD W/ 8d
NAILS @ 6" O.C. (Standard 6" /
12" nailing elsewhere)
Typical
4x4 Posts
min
4X4 POST
1" STANDOFF BETWEEN
CONCRETE AND WOOD
POST
FOOTING SIZE:
SEE TABLE “C”
COLUMN BASE - USE
SIMPSON CBSQ, PBS
OR EQUAL W/BOLTS/
SCREWS/NAILS PER
MFG. SPECS.
Dr
RScntyLMNptioFNL.vs
RScntyLMNptioFNL.vd d PAGE 1 OF 2
Patio Cover Standard
Dr
04/2021 PAGE 1 OF 2
e.2x JOISTS ARE NOT ALLOWED IN HIGH FIRE ZONE. PLEASE REFER TO 4x JOIST
SCHEDULE FOR HIGH FIRE ZONE.
f.PLYWOOD AND ROOFING MATERIAL USED IN HIGH FIRE ZONE SHALL BE CLASS "A".
4 x 4
4 x 6
4 x 8
4 x10
(e)
(e)
(e)
(e)
(f )
NOTE: VERIFY STRUCTURAL SOUNDNESS OF ROOF
RAFTERS FOR DECAY OR TERMITE DAMAGE,
AND REPLACE WITH LIKE MATERIALS AS
NEEDED, AFTER CONSULTATION WITH THE
BUILDING DEPARTMENT.
TWO ½" DIA. THRU-BOLTS
(W/ WASHERS), PER
CONNECTION AS SHOWN
FOR HEADERS OR RAFTERS-
TWO 2X MEMBERS MAY BE
SUBSTITUTED FOR ONE 4X
MEMBER EXCEPT IN HIGH
FIRE ZONE. SEE TABLES “A”
& “B” FOR SPAN LIMITS
INVERTED HEADER DESIGN OPTION (lattice only)
2X FASCIA (OVERHANG) ATTACHMENT – LATTICE ONLY
NOTES:
1. USE A CONTINUOUS 2x MIN LEDGER – SAME
DEPTH AS RAFTER OR LARGER. ATTACH-2x
BLOCKINGS TO 2x LEGDGER WITH 10 D NAILS
2.SEE TABLE ''D'' FOR BOLTING REQUIREMENTS
NOTE:
RAFTER
APPROVED JOIST
HANGER
EXISTING
STUDS
EXISTING
ROOF
LEDGER ATTACHMENT
DETAIL
3/8" X 5"
LAG
BOLTS
4x4
POST
(MIN.)
KNEE BRACE DETAIL AT END POSTS
(REQUIRED WHEN RAFTER SPAN EXCEEDS 12 FT.)
OPTION 1
24
"
3"
4x4 BRACE
24"
24
"
(2) 2X4 BRACES
24"
A A4x4 POST
HEADER
½” DIA BOLTS W/NUTS &
WASHERS TYPICAL ALL
BRACED CONNECTIONS
OPTION 2
EDGE NAIL
PLYWOOD AT 6"
O.C. AT LEDGER
SIMPSON A-35 OR
EQUAL ANCHOR
2X6 OR LARGER RAFTERS
OPTION 2
PATIO RAFTERS
SEE TABLE “A”
30" MAX
OVERHANG
PATIO RAFTERS
SEE TABLE “A”
2X4 RAFTERS OR PRE-FAB. ROOF TRUSSES
2X4 LEDGER W/ 20d NAILS OR ¼" DIA. X 4"
LONG LAG BOLTS @32" O.C.
2X4 STRUT W/(3) 8d TOENAILS
FROM STRUT TO LEDGER
(2) 16d NAILS
OPTION 1
PATIO RAFTER SPAN
LIMITEDTO 8'FOR LATTICE
COVER
30" MAX
OVERHANG
3"
2x MIN LEDGER
SECTION A-A
APPROVED JOIST HANGER
A-35 OR EQUAL ANCHOR
NOTCH:
1- ½”
(typical)
2X FASCIA
2X2 OR 2X4
PATIO RAFTER SPAN
LIMITEDTO 8'FOR LATTICE
COVER
2X FASCIA
APPROVED
JOIST HANGER
PAGE 2 OF 2
Patio Cover Standard
04/2021 PAGE 2 OF 2
*4x4 BRACES FOR H.F.Z
KNEE BRACING REQUIRED WHEN
RAFTER SPAN EXCEEDS 12 FEET.