ORDINANCE 1455ORDINANCE NO. 1455
AN ORDINANCE INCORPORATING THE 2010 CALIFORNIA
RESIDENTIAL CODE ( "CRC ") BY REFERENCE AND
AMENDING THE CRC BASED UPON LOCAL CLIMATIC,
TOPOGRAPHIC, AND GEOLOGICAL CONDITIONS.
The council of the city of El Segundo does ordain as follows:
SECTION 1: FINDINGS. The City Council finds and declares as follows:
A. In accord with Health & Safety Code § 17958.7, it is in the public interest to adopt
the California Residential Code ( "CRC') with the changes set forth in this Ordinance.
B. Pursuant to the requirements of Health & Safety Code Section 17958.7, the City Council
finds that there are local geological conditions justifying the CRC amendments set forth below.
The City of El Segundo and the greater Los Angeles region is a densely populated area having
buildings and structures constructed over and near a vast array of fault systems capable of
producing major earthquakes, including but not limited to the recent 1994 Northridge Earthquake.
The proposed modification emphasize that the design concern is for seismic - force - resisting
elements and therefore need to be incorporated into the code to assure that new buildings and
structures and additions or alterations to existing buildings or structures are designed and
constructed in accordance with the scope and objectives of the International Building Code.
Experts predict a major earthquake in our area within the next 50 years. This situation creates
the need for both additional fire protection measures and automatic on -site fire protection of
building occupants since a multitude of fires may result from breakage of gas and electric lines as
a result of an earthquake. After due consideration, the City Council finds and determines that due
to local climatic, geological, or topographical conditions, the structural and fire protection
amendments to the 2010 CRC are necessary to give buildings a reasonable degree of structural
integrity and fire life safety to help protect public health and safety in the event of a seismic event;
Additional amendments have been made to Codes are hereby found to be either administrative or
procedural in nature or concern themselves with subjects not covered in such Codes. The
changes made include provisions making each of said Codes compatible with other Codes
enforced by the City.
C. The specific amendments of the CRC that fulfill this requirement are:
1. Amend CRC Section R301.1.3.2 Woodframe Structures
2. Amend CRC Section R301.2.2.2.5 Irregular Buildings
3. Amend CRC Section R311.2.2.3.5.1 AISI S230 Section B1
4. Amend CRC Section R322.1.4.1 Design Flood Elevations
5. Amend CRC Section R322.1.4.1 Design Flood Elevations
6. Amend CRC Section R401.1 Foundation Application
7. Amend CRC Section R403.1 General Footings
8. Amend CRC Section R404.2 Wood Foundation Walls
9. Amend CRC Section R501.1 Application
10. Amend CRC Section R503.2.4 Openings In Horizontal Diaphragms
11. Amend CRC Table R602.3(1) Fastener Schedule
12. Amend CRC Table R602.3(2) Alternate Attachment
13. Amend CRC Table R602.10.1.2(2) Bracing Requirement
14. Amend CRC Table R602.10.2 Intermittent Bracing Method
15. Amend CRC Figure R602.10.3.2 Alternate Braced Wall Panel
16. Amend CRC Figure R602.10.3.3 Portal Frame
17. Amend CRC Section R602.10.3.3 Method PFH
18. Amend CRC Table R602.10.4.1 Continuous Sheathing
19. Amend CRC Figure 8602.10.4.1.1 Method CS -PF
20. Delete CRC Section R602.10.7.1 Braced Wall Panel
21. Amend CRC Section R606.2.4 Parapet Walls
22. Amend CRC Section R606.12.2.2.3 Reinforcement for Masonry
23. Amend CRC Section R602.3.2 Single Top Plate
24. Amend CRC Table R802.5.1(9) Joist Heel Joint Connection
25. Amend CRC Section R802.8 Lateral Support
26. Amend CRC Section R802.10.2 Design of Wood Trusses
27. Add CRC Section R803.2.4 Openings in Horizontal Diaphragms
28. Amend CRC Section R1001.3.1 Vertical Reinforcing
D. At least one copy of the CBC was filed with the City Clerk of the City was available for public
inspection for at least fifteen ( 15) days preceding the date of the hearing
SECTION 2: El Segundo Municipal Code ( "ESMC ") § 13 -16 -1 is added in its entirety
to read as follows:
CHAPTER 16
RESIDENTIAL CODE
13 -16 -1: California Residential Code Adopted
13 -16 -2: Amendments to California Residential Code
13 -16 -1: ADOPTION OF CALIFORNIA RESIDENTIAL CODE,
2010 EDITION. Pursuant to California Government Code § 50022.2, the
California Residential Code, 2010 Edition, published at Title 24, Part 2.5, of the
California Code of Regulations is adopted by reference, subject to the
amendments, additions and deletions set forth below. One true copy of the CRC,
is on file in the office of the Building Official and is available for public
inspection as required by law."
SECTION 3: ESMC § 13 -16 -2 is added to read as follows:
"13 -16 -2: AMENDMENTS TO THE CALIFORNIA RESIDENTIAL
CODE:
Section R301.1.3.2 of the 2010 Edition of the California Residential Code is amended to read as follows:
R301.1.3.2 Woodframe structures. The building official shall require construction documents to be
approved and stamped by a California licensed architect or engineer for all dwellings of woodframe
construction more than two stories and basement in height located in Seismic Design Category A, B or C.
Notwithstanding other sections the law, the law establishing these provisions is found in Business and
Professions Code Section 5537 and 6737.1.
The building official shall require construction documents to be approved and stamped by a California
licensed architect or engineer for all dwellings of woodframe construction more than one story in height or
with a basement located in Seismic Design Category Do, D1, Dz or E.
Section R301.2.2.2.5 of the 2010 Edition of the California Residential Code is amended to read as
follows:
1. When exterior shear wall lines or braced wall panels are not in one plane vertically from the
foundation to the uppermost story in which they are required.
3. When the end of a braced wall panel occurs over an opening in the wall below.
5. When portions of a floor level are vertically offset.
Section R301.2.2.3.5.1 is added to Section 301.2.2.3.5 of the 2010 Edition of the California Residential Code as
follows:
R301.2.2.3.5.1 AISI S230, Section B1. Modify AISI S230, Section B1 to read as follows:
Where No. 8 screws are specified, the required number of screws in a steel -to -steel connection shall be
permitted to be reduced in accordance with the reduction factors in Table 131 -1 when larger screws are
used or when the sheets of steel being connected is thicker than 33 mils (0.84mm). When applying the
reduction factor, the resulting number of screws shall be rounded up.
Section R322.1.4.1 of the 2010 Edition of the California Residential Code is amended to read as follows:
R322.1.4.1 Determination of design flood elevations. If design flood elevations are not specified, the
building official is authorized to require the applicant to:
1. Obtain and reasonably use data available from a federal, state or other source; or
2. Determine the design flood elevation in accordance with accepted hydrologic and hydraulic
undertaken by a registered civil engineer who shall determine that the technical methods used reflect
currently accepted engineering practice. Studies, analyses and computations shall be submitted
insufficient detail to allow thorough review and approval.
Section R401.1 of the 2010 Edition of the California Residential Code is amended to read as follows:
R401.1 Application. The provisions of this chapter shall control the design and construction of the
foundation and foundation spaces for all buildings. In addition to the provisions of this chapter, the design
and construction of foundations in areas prone to flooding as established by Table R301.2(1) shall meet
the provisions of Section R322. Wood foundations shall be designed and installed in accordance with
AF &PA PWF.
Exception: The provisions of this chapter shall be permitted to be used for wood foundations only in
the following situations:
1. In buildings that have no more than two floors and a roof.
2. When interior basement and foundation walls are constructed at intervals not exceeding 50 feet
(15 240 mm).
Wood foundations in Seismic Design Category Do, Di or D2 shall not be permitted.
Exception: In non - occupied, single- story, detached storage sheds and similar uses other than
carport or garage, provided the gross floor area does not exceed 200 square feet, the plate height
does not exceed 12 feet in height above the grade plane at any point, and the maximum roof
projection does not exceed 24 inches.
Sections R403.1.2, R403.1.3, R403.1.5 of the 2010 Edition of the California Residential Code are
amended to read as follows:
R403.1.2 Continuous footing in Seismic Design Categories Do, D, and D2. The braced wall panels at
exterior walls of buildings located in Seismic Design Categories Do, D, and D2 shall be supported by
continuous footings. All required interior braced wall panels in buildings shall be supported by continuous
footings.
R403.1.3 Seismic reinforcing. Concrete footings located in Seismic Design Categories Do, D, and D2, as
established in Table R301.2(1), shall have minimum reinforcement. Bottom reinforcement shall be located
a minimum of 3 inches (76 mm) clear from the bottom of the footing.
In Seismic Design Categories Do, D, and D2 where construction joint is created between a concrete
footing and a stem wall, a minimum of one No. 4 bar shall be installed at not more than 4 feet (1219 mm)
on center. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing, have a
standard hook and extend a minimum of 14 inches (357 mm) into the stem wall.
In Seismic Design Categories Do, D, and D2 where a grouted masonry stem wall is supported on a
concrete footing and stem wall, a minimum of one No. 4 bar shall be installed at not more than 4 feet
(1219 mm) on center. The vertical bar shall extend to 3 inches (76 mm) clear of the bottom of the footing
and have a standard hook.
In Seismic Design Categories Do, D, and D2 masonry stem walls without solid grout and vertical
reinforcing are not permitted.
Exception: in detached one- and two - family dwellings located in Seismic Design Category A, B or C
which are three stories or less in height and constructed with stud bearing walls, plain concrete
footings without longitudinal reinforcement supporting walls and isolated plain concrete footings
supporting columns or pedestals are permitted.
R403.1.5 Slope. The top surface of footings shall be level. The bottom surface of footings shall be
permitted to have a slope not exceeding one unit vertical in 10 units horizontal (10- percent slope).
Footings shall be stepped where it is necessary to change the elevation of the top surface of the footing
or where the surface of the ground slopes more than one unit vertical in 10 units horizontal (10- percent
slope).
For structures located in Seismic Design Categories Do, D, or D2, stepped footings shall be reinforced
with four 1/2 -inch diameter (12.7 mm) deformed reinforcing bars. Two bars shall be place at the top and
bottom of the footings as shown in Figure R403.1.5.
RECOMMI : a > b
bS2V
MIN. 2 -04 REBAR (TOP & BOTTOM)
r BOrlo f PLATE 0 YP,I
� , I
GRADE
........ .. .. -i-
STEPPED FOUNDATIONS
FIGURE R403.1.5
STEPPED FOOTING
Section R404.2 of the 2010 Edition of the California Residential Code is amended to read as follows:
R404.2 Wood foundation walls. Wood foundation walls shall be constructed in accordance with the
provisions of Sections R404.2.1 through R404.2.6 and with the details shown in Figures R403.1(2) and
R403.2(3). Wood foundation walls shall not be used for structures located in Seismic Design Category Do,
D, or DZ.
Section R501.1 of the 2010 Edition of the California Residential Code is amended to read as follows:
R501.1 Application. The provision of this chapter shall control the design and construction of the floors
for all buildings including the floors of attic spaces used to house mechanical or plumbing fixtures and
equipment weighing less than 400 Ibs and maximum height of 4 feet above the floor or attic level.
Section R503.2.4 is added to Chapter 5 of the 2010 Edition of the California Residential Code to read as
follows:
R503.2.4 Openings in horizontal diaphragms. Openings in horizontal diaphragms with a dimension
perpendicular to the joist that is greater than 4 feet (1.2 m) shall be constructed in accordance with Figure
R503.2.4.
PLYWOOD SHEATHING
METALTIE 16GA. x 1 Itr" x 4'-W MIN., (4 TOTAL)
W1 1E -16d COMMON NAILS AS SHOWN
Ia
METAL TIE 16GA. x 1 1/2"X (OPENING WIDTH + 4'-V) MIN.,
(2 TOTAL) W1 24.164 COMMON NAILS
Fur SI: I uxh = 25.4 mm, l ra>t - 304.8 mm.
.,*"
a. Blockings shall be provided beyond headers.
b. Metal ties not less than 0.058 inch [1.47 mm (16 galvanized gage)] by 1.5 inches (38 mm) wide with eight 16d common nails on
each side of the header -joist intersection. The metal ties shall have a minimum yield of 33,000 psi (227 MPa).
c. Openings in diaphragms shall be further limited in accordance with Section R301.2.2.2.5.
FIGURE R503.2.4
OPENINGS IN HORIZONTAL DIAPHRAGMS
Lines 34 thru 37 of Table R602.3(1) of the 2010 Edition of the California Residential Code are amended
to read as follows:
Other wall sheathing
tJ "structural cellulosic
t/ "galvanized roofing nail ,z— f— �rewirer
2 16
34
2
3
6
fiberboard sheathing
4
251 " structural cellulosic
1314" galvanized roofing nail, z 16, er ewr OF '
35
32
�
3
6
fiberboard sheathing
2
1t/ "galvanized roofing nail;�ize�
36
�/ "gypsum sheathings
2
2
t� '-long'
7
7
'— screws, Type W or S
4
131 " glavamzed roofing nail, staple ga�nized,
37
5/ "gypsum sheathings
e
4
5 a5 leng 15" screws W or S
/8
7
7
Table R602.3(2) of the 2010 Edition of the California Residential Code is amended to read as follows:
Wood structural panels subfloot, roof and wall sheathing to (raining and paniclebowd wall sheathing to flaming'
Plywood
Staple 15 98 3
4
111 ring or screw shank nail- minimum
0097 -0099 Nail 2114
3
6
up to 1/2
Stepp —
1/ and 5/
121/ ga (0 099 ") shank diameter
0 113 Nail 2
3
6
Staple 15 and 16 ga--2--
#—
$
19/ and s/
32 8
0 097 - 0 099 Nail 21/4
4
8
--2-
Sta
#
__&
Staple i5 go 4? 4-
4
�r
and 3/
32 4
0 097 - 0 099 Nail 21/4
4
B
1
12 /2 ga. (0 099 ) shank diameter
Staple 16 go 2--
-4
$
1
Staple # 4
$
0 113 Nail 2114
3
6
Staple !Sge
p
#
$
1
Floor underlayrnent; plywood - hardb oat d- patticleboardt
Plywood
111 ring or screw shank nail- minimum
4
3
6
1/ and 5/
121/ ga (0 099 ") shank diameter
4 16
2
7 3
8 16
--2-
111 ring or screw shank nail- minimum
11/ 3/ 1s/ ,and 1/
4
6
6°
,
32 8 32 2
1
12 /2 ga. (0 099 ) shank diameter
11/ ring or screw shank nail - minimum
2
fi
8
191 5/ 23/ and 3/
1211 ga (0 099' ) shank diameter
, ,
32 8 32 4
2
1 it-
Staple 16 9a
2
$
Table R602.10.1.2(2) of the 2010 Edition of the California Residential Code is amended to read as
follows:
TABLE R602.10.1.2(2) -b,
BRACING REQUIREMENTS BASED ON SEISMIC DESIGN CATEGORY
(AS A FUNCTION OF BRACED WALL LINE LENGTH)
SOIL CLASS D'
WALL HEIGHT - 10 FT
NP
10 PSF FLOOR DEAD LOAD
20
15 PSF ROOF'CEILING DEAD LOAD
MINIMUM TOTAL LENGTH (teen OF BRACED WALL PANELS REOUIRED
BRACED WALL LINE SPACING S 25 FT
ALONG EACH BRACED WALL LINE
Seismic Design
34
30
NP
Methods4
60
5 1
Category
NP
Braced Wall
80
DWB, SFB, GB,
50
Continuous
(SDQ
Story Location
Line Length
Method LIB
PBS, PCP, HPS
MetlroJ WSP
Sheathing
d. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC Do, D1, and D2.
Methods DWB, SFB, PBS, and HPS are not permitted in SDC Do, D1, and D2.
10
NP
-3-8- u
20
1 7
20
NP
$0- i1g
4.0
34
30
NP
4J18- 10.4
60
5 1
40
NP
42$ 24 Q
80
68
50
NP
-15 a 2u
100
8.5
SDC Door D1
^
10
NP
-6-& WP
45
38
20
NP
1215 -.N
9.0
77
30
NP
}8.0 t
135
115
40
NP
- 24-8 - NE
180
15.3
50
NP
--3" Ha
225
191
G
LHJ
10
NP
o.c �'±P
60
51
20
NP
4;,-4 �t
120
102
30
NP
35-s N
180
153
40
NP
-34$ M
240
204
50
NP
42 5-M-
300
255
d. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC Do, D1, and D2.
Methods DWB, SFB, PBS, and HPS are not permitted in SDC Do, D1, and D2.
10
NP
4 8 u
2.5
20
NP
& Lu
so
30
NP
t2-0 2i-Q
75
40
NP
J&Q 32 0
100
50
NP
204 40 0
125
SDC D2
^
10
NP
-7-& 1L
55
20
NP
, NP
11.0
30
NP
SNP
16.5
40
NP
-39-8-N
22.0
50
NP
-375- NP
27.5
10
NP
NP
NP
20
NP
NP
NP
30
NP
NP
NP
40
NP
NP
NP
50
NP
NP
NP
d. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC Do, D1, and D2.
Methods DWB, SFB, PBS, and HPS are not permitted in SDC Do, D1, and D2.
Table R602.10.2 of the 2010 Edition of the California Residential Code is amended to read as follows:
TABLE R602.10.2
INTERMITTENT BRACING METHODSa
WSP wood structural panel I 3�•_
(see Section RCd34)
8d common (2 1/2" x 0.131) nails at 6"
spacing (panel edge) at 12" spacing
(intermediate supports), 3/8" edge
distance to panel edge
see Table RE>B? d*??
1112" galvanized roofing nails or
112
25!32'
SFB
Structural
or for maximum 16"
Eld common (liJ " x 0 131) nails
fiberboard sheathing
stud spacing
z
at 3" spacing (panel edges) at 6"
spacing (intermediate supports)
Nails or screws at 7" spacing at
panel edges including top and
bottom plates. for all braced wall
GB
Gypsum board
/ "
panel locations for exterior
2
sheathing nail or screw size, see
Table P60' 3i 1 i, for interior
gypsum board nail or screw size.
see Table P.7CJ 3 `
111 2 " galvanized roofing nails or
PBS
Particleboard sheathing
31 " or'/ " maximum 16"
e 2
t
Bid common (1 /2' x 0 131) nails
(see Section PO-jr)
stud spacing
at 3' spacing (panel edges) at 6
spacing (intermediate supports)
111 ", 11 2 16 gage. 7/ ' head nails at
PCP Portland cement See Section R%0' E. } 6' spacing er-
plaster For maximum 16" stud spacing ! I
F-- I e
SP81F Rill
a. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC Do, D1, and D2.
Methods LIB, DWB, SFB, PBS, HPS, and PFG are not permitted in SDC Do, D1i and D2.
Figure R602.10.3.2 of the 2010 Edition of the California Residential Code is amended to read as follows:
TOP PLATES SHALL BE CONTINUOUS OVER A BRACED WALL PANEL
FIGURE R602.10.3.2
ALTERNATE BRACED WALL PANEL
FOR PANEL SPLICE (IF NEEDED)
ADJOINF4G PANEL EDGES SHALL
MEETOVERAND BE FASTENED TO
COMMON FRAMING
8D COMMON GR GAL*. Be*
NAILS @ 6' O.C. AT PANEL EDGES.
FOR SINGLE STORY AND AT 4.O.C.
PANEL EDGES FOR THE FIRST OF 2
STORIES.
60 COMMON AR6dr Y- BRIE
INTERIOR SUPPORTS
(2)W DWMETERANCHOR BOLTS
PER FIGURE R403.1.1. LOCATED
BETWEEN 6 AND 12 INCHES OF
EACH END OF THE SEGMENT
�— MINIMUM REINFORCING OF
FOUNDATION. ONE $4 BAR TOP AND
BOTTOM OF FOOTING REWORCING
SHALL BE LAPPEDI5rINCHES
-� MINIMUM FOOTING SIZE U24 4
OPENING IS 12x17. *4 R - NE6 BdYMN
- OPENINGS. REINFORCING SHALL
BE AS SHOrIIN ABOVE.
Kn.15f32"
-MOW-4,-THICK WOOD STRUCTURAL
PANEL SHEATHING ON ONE FACE - -.
MINIMUM 2 z 4
=
FRAMING MINIMUM
DOUBLE STUDS
3
REQUIRED
STUDS UNDER HEADER AS,
B
REQUIRED
U
HOLD-DOWN OR STRAP-TYPE
ANCHOR PER TABLE
R602.10.3.2. (BOTH SHOWN FOR
CLARITY.) STRAP-STYLE
ANCHORS SHALL BE PERMITTED
TO BE ATTACHED OVER THE
WOOD STRUCTURAL PANEL
FIGURE R602.10.3.2
ALTERNATE BRACED WALL PANEL
FOR PANEL SPLICE (IF NEEDED)
ADJOINF4G PANEL EDGES SHALL
MEETOVERAND BE FASTENED TO
COMMON FRAMING
8D COMMON GR GAL*. Be*
NAILS @ 6' O.C. AT PANEL EDGES.
FOR SINGLE STORY AND AT 4.O.C.
PANEL EDGES FOR THE FIRST OF 2
STORIES.
60 COMMON AR6dr Y- BRIE
INTERIOR SUPPORTS
(2)W DWMETERANCHOR BOLTS
PER FIGURE R403.1.1. LOCATED
BETWEEN 6 AND 12 INCHES OF
EACH END OF THE SEGMENT
�— MINIMUM REINFORCING OF
FOUNDATION. ONE $4 BAR TOP AND
BOTTOM OF FOOTING REWORCING
SHALL BE LAPPEDI5rINCHES
-� MINIMUM FOOTING SIZE U24 4
OPENING IS 12x17. *4 R - NE6 BdYMN
- OPENINGS. REINFORCING SHALL
BE AS SHOrIIN ABOVE.
Figure R602.10.3.3 of the 2010 Edition of the California Residential Code is amended to read as follows:
EXTENT OF HEADER
DOUBLE PORTAL FRAME (TWO BRACED WALL PANELS)
MIN. Y x 1125' NET HEADER
FIGURE R602.10.3.3
METHOD PFH: PORTAL FRAME WITH HOLD -DOWNS AT DETACHED GARAGE DOOR OPENINGS
Item 1 of Section R602.10.3.3 of the 2010 Edition of the California Residential Code is amended to read
as follows:
Each panel shall be fabricated in accordance with Figure R602.10.3.3. The wood structural panel
sheathing shall extend up over the solid sawn or glued - laminated header and shall be nailed in
accordance with Figure R602.10.3.3. A spacer, if used with a built -up header, shall be placed on
the side of the built -up beam opposite the wood structural panel sheathing. The header shall
extend between the inside faces of the first full - length outer studs of each panel. One anchor bolt
not less than 5/8- inch - diameter (16 mm) and installed in accordance with Section R403.1.6 shall
be provided in the center of each sill plate. The hold -down devices shall be an embedded -strap
type, installed in accordance with the manufacturer's recommendations. The panels shall be
supported directly on a foundation that is continuous across the entire length of the braced wall
line. The foundation shall be reinforced as shown on Figure R602.10.3.2. This reinforcement shall
be lapped not less than 24 inches (610 mm) with the reinforcement required in the continuous
foundation located directly under the braced wall line.
6' TO 18' —�
FASTEN TOP PLATE TO HEADER WITH TWO
TYPICAL PORTAL
ROWS OF 18D SN103R NAZIS AT 3' O.0 TYP. 1 O LB
FRAME
CONSTRUCTION
S P
1000 LB STRAP OPPOSITE SHEATHING
FOR A PANEL SPLICE
OF NEEDED')
FASTEN SHEATHING TO HEADER WITH aD COMMON OR
LL BE
EDGES SHALL BE
MAX
9JktdAl1�69d( NAILS IN 3' GRID PATTERN AS SHOWN AND
BLOCKED, AND OCCUR
HEIGHT
3' O.C. INALLFRAMING ( STUDS. BLOCIONa AND SILLS)TYP.
NITHN 242 OF MID -
10'
24
HEIGHT. ONE ROW OF
TYP. SHEATHING -TO-
MIN.WIDTH = W FOR ONE STORY STRUCTURE
FRAMING NAILING IS
-
REOURED.
IF 2x4 BLOCKING IS
USED, THE W-S MUST
SE NAILED TOGETHER
MIN. 2x4 FRAMING
M
WITH 3 16D SINKERS
15132" DOU E
IN. THICKNESS WOOD
2x1 ST
STRUCTURAL PANEL SHEATHING
MIN. 4200 LB TIE-DoWN DEVICE (EMBEDDED INTO
CONCRETE AND NAILED INTO FRAMING)
M . 1000 LB
n
SEESECTION R60210.3.3
FIGURE R602.10.3.3
METHOD PFH: PORTAL FRAME WITH HOLD -DOWNS AT DETACHED GARAGE DOOR OPENINGS
Item 1 of Section R602.10.3.3 of the 2010 Edition of the California Residential Code is amended to read
as follows:
Each panel shall be fabricated in accordance with Figure R602.10.3.3. The wood structural panel
sheathing shall extend up over the solid sawn or glued - laminated header and shall be nailed in
accordance with Figure R602.10.3.3. A spacer, if used with a built -up header, shall be placed on
the side of the built -up beam opposite the wood structural panel sheathing. The header shall
extend between the inside faces of the first full - length outer studs of each panel. One anchor bolt
not less than 5/8- inch - diameter (16 mm) and installed in accordance with Section R403.1.6 shall
be provided in the center of each sill plate. The hold -down devices shall be an embedded -strap
type, installed in accordance with the manufacturer's recommendations. The panels shall be
supported directly on a foundation that is continuous across the entire length of the braced wall
line. The foundation shall be reinforced as shown on Figure R602.10.3.2. This reinforcement shall
be lapped not less than 24 inches (610 mm) with the reinforcement required in the continuous
foundation located directly under the braced wall line.
Table R602.10.4.1 of the 2010 Edition of the California Residential Code is amended to read as follows:
TABLE R602.10.4.1
CONTINUOUS SHEATHING METHODS
METHOD
MATERIAL
MINIMUM THICKNESS
FIGURE
CONNECTION CRITERIA
Q�
frd- common (2" x 0.113 ") nails
15132'
at 6" spacing (panel edges) and
at 12" spacing (intermediate
CS -WSP
Wood structural panel
3 e
l--I --I tu
supports) 3
4
ai;32 spaelng (paRel edges) aFid
CS -G
Wood structural panel adjacent
to garage openings and
supporting roof load onlyo'b
15/3
—2�L—
8
See Method CS -WSP
N
CS -PF
Continuous portal frame
See Section
P60 10 4 1 1
See Section
P602 l0 4 1 1
W
Figure 8602.10.4.1.1 of the 2010 Edition of the California Residential Code is amended to read as
follows:
I
-
2. �, i ;.;�� _
'
MIN. 1000 LB
PONY
l
TENSION STRAP.
WALL -
BRACED WALL SEGMENT PER R602.10.4 -
l :
y
STRAP SHALL BE
HEIGHT'.
f:
i;
i
CENTERED AT
�.
BOTTOM OF
MIN 3' X 11 1 M' NET HEADER
!
.... ;.I
HEADER
p'
SHEATHING FILLER
�•
••
2' TO 19 ;FINISHED WIDTH)
•S;
. -
If NEEDED
FASTEN SHEATHING TO HEADER WITH BID COMMON
12 ,
NAILS IN 3' GRID PATTERN AS SHOWN AND 3.O C IN
160
MAX ..
yx
ALL FRAMING ISTUDS AND SILLS) TYP
l;
..I
SINKER
NAILS IN 2 ROWS
WALL ..
HEADER SHALL BE FASTENED TO THE KING STUD WITH
�;
-
(L0 YO .0
6 -16D SINKER NAILS
HE ;;
MINIMUM 1000 LB STRAP SHALL BE CENTERED AT —
^.
WOOD STRUCTURAL
PANEL MUST BE
BOTTOM OF HEADER AND INSTALLED ON BACKSIDE
II
CONTINUOUS FROM
10 -.
AS SHOWN ON SIDE ELEVATION
TOP OF WAIL TO
�__
MAX
HEIGHT..
FOR A PANEL SPLICE (IF NEEDED), PANEL EDGES SHALL
�;
µ
BOTTOM OF WALL,
OCCUR OVER AND BE NAILED TO COMMON BLOCKING AND
_ -'"1
OR FROM TOP OF
OCCUR WITHIN MIDDLE 24' OF WALL HEIGHT ONE ROW OF
WALL TO PERMITTED
3" O.C. NAILING IS REQUIRED IN EACH PANEL EDGE
,•
SPLICE AREA
WOOD STRUCTURAL PANEL STRENGTH AXIS
-•
15f32"
-•
•• -
9M' MIN
MIN. NUMBER OF STUDS SHOWN
THICKNESS WOOD
STRUCTURAL PANEL
SHEATHING.
••
•^
MIN LENGTH BASED ON 6 1 HEIGHT-TO-LENGTH RATIO- .24" MM. VNDTH ••
ANCHOR BOLT PER R403 1 6 TYP
2 ANCHOR BOLTS PER R403.1 6 REQUIRED
NO OF JACK STUDS
PER TABLE R5025(1 d2)
MIN.2'>G�43l16' PLATE WASHER
PER TABLE 8602 10 4.6
3 "X3 "X0.229"
nVFR CC)NfRFTF AR MA'inNRY RI CWK
FAIINAATIAN
Section R602.10.7.1 of the 2010 Edition of the California Residential Code is deleted in its entirety:
Section R606.2.4 of the 2010 Edition of the California Residential Code is amended to read as follows:
R606.2.4 Parapet walls. Unreinforced solid masonry parapet walls shall not be less than 8 inches (203
mm) thick and their height shall not exceed four times their thickness. Unreinforced hollow unit masonry
parapet walls shall be not less than 8 inches (203 mm) thick, and their height shall not exceed three times
their thickness. Masonry parapet walls in areas subject to wind loads of 30 pounds per square foot (1.44
kPa) or located in Seismic Design Category Do, D, or D2, or on townhouses in Seismic Design Category
C shall be reinforced in accordance with Section R606.12.
Section 8606.12.2.2.3 of the 2010 Edition of the California Residential Code is amended to read as
follows:
R606.12.2.2.3 Reinforcement of requirements for masonry elements. Masonry elements listed in
Section 8606.12.2.2.2 shall be reinforced in either the horizontal or vertical direction as shown in Figure
P606:1 4 (2-)R606.11(3) and in accordance with the following:
1. Horizontal reinforcement. Horizontal joint reinforcement shall consist of at least one No. 4 bar spaced
not more than 48 inches (1219 mm). Horizontal reinforcement shall be provided within 16 inches (406
mm) of the top and bottom of these masonry elements.
2. Vertical reinforcement. Vertical reinforcement shall consist of at least one No. 4 bar spaced not more
than 48 inches (1219 mm). Vertical reinforcement shall be within 8 inches (406mm) of the ends of
masonry walls.
Exception of Section 602.3.2 of the 2010 Edition of the California Residential Code is amended to read as
follows:
Exception: In other than Seismic Design Category Do, D, or D2, a single top plate may be installed in stud
walls, provided the plate is adequately tied at joints, corners and interesting walls by a minimum 3 -inch-
by -6 -inch by a 0.036- inch -thick (76 mm by 152 mm by 0.914 mm) galvanized steel plate that is nailed to
each wall or segment of wall by six 8d nails on each side, provided the rafters or joists are centered over
the studs with a tolerance of no more than 1 inch (25 mm). The top plate may be omitted over lintels that
are adequately tied to adjacent wall sections with steel plates or equivalent as previously described.
Footnote "i" is added to Table R802.5.1(9) of the 2010 Edition of the California Residential Code to read
as follows:
Edge distances, end distances and spacings for nails shall be sufficient to prevent splitting of the wood.
Section R802.8 of the 2010 Edition of the California Residential Code is amended to read as follows:
R802.8 Lateral support. Roof framing members and ceiling joists having a depth -to- thickness ratio
exceeding 62 to 1 based on nominal dimensions shall be provided with lateral support at points of bearing
to prevent rotation. For roof rafters with ceiling joists attached per Table R602.3(1), the depth- thickness
ratio for the total assembly shall be determined using the combined thickness of the rafter plus the
attached ceiling joist.
Section R802.10.2 of the 2010 Edition of the California Residential Code is amended to read as follows:
R802.10.2 Design. Wood trusses shall be designed in accordance with accepted engineering practice.
The design and manufacture of metal - plate- connected wood trusses shall comply with ANSI/TPI 1. The
truss design drawings shall be prepared by a registered professional.
Section R803.2.4 is added to Chapter 8 of the 2010 Edition of the California Residential Code to read as
follows:
R803.2.4 Openings in horizontal diaphragms. Openings in horizontal diaphragms shall conform with
Section R503.2.4.
Section R1001.3.1 of the 2010 Edition of the California Residential Code is amended to read as follows:
R1001.3.1 Vertical reinforcing. For chimneys up to 40 inches (1016 mm) wide, four No. 4 continuous
vertical bars adequately anchored into the concrete foundation shall be placed between wythes of solid
masonry or within the cells of hollow unit masonry and grouted in accordance with Section 8609. Grout
shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal
expansion. For chimneys more than 40 inches (1016 mm) wide, two additional No. 4 vertical bars
adequately anchored into the concrete foundation shall be provided for each additional flue incorporated
into the chimney or for each additional 40 inches (1016 mm) in width or fraction thereof.
SECTION 3: CALIFORNIA ENVIRONMENTAL QUALITY ACT EXEMPTION. The City
Council determines that this ordinance is exempt from review under the California
Environmental Quality Act (California Public Resources Code §§ 21000, et seq., "CEQA ") and
the regulations promulgated thereunder (14 California Code of Regulations §§ 15000, et seq., the
"State CEQA Guidelines ") because it consists only of minor revisions and clarifications to an
existing code of construction- related regulations and specification of procedures related thereto
and will not have the effect of deleting or substantially changing any regulatory standards or
findings required therefor. This ordinance, therefore, is an action being taken for enhanced
protection of the environment and that does not have the potential to cause significant effects on
the environment.
SECTION 4: SAVINGS CLAUSE. Repeal of any provision of the ESMC or any other city
ordinance herein will not affect any penalty, forfeiture, or liability incurred before, or preclude
prosecution and imposition of penalties for any violation occurring before, this Ordinance's
effective date. Any such repealed part will remain in full force and effect for sustaining action or
prosecuting violations occurring before the effective date of this Ordinance.
SECTION 5: SEVERABILITY. If any part of this Ordinance or its application is deemed
invalid by a court of competent jurisdiction, the city council intends that such invalidity will not
affect the effectiveness of the remaining provisions or applications and, to this end, the
provisions of this Ordinance are severable.
SECTION 6: VALIDITY OF PREVIOUS CODE SECTIONS. If this the entire Ordinance or its
application is deemed invalid by a court of competent jurisdiction, any repeal of the ESMC or
other the city ordinance by this Ordinance will be rendered void and cause such ESMC provision
or other the city ordinance to remain in full force and effect for all purposes.
SECTION 7: EFFECTIVE DATE. This Ordinance will take effect on January 1, 2011.
PASSED AND ADOPTED this 16thday of November 2010.
ric Busch, ayor
APPROVED AS TO FORM
MARK //7�2
LEY, CITY ATTORNEY
By:
C�
Berger �L 1
Assistant City Attorney
ATTEST:
STATE OF CALIFORNIA )
COUNTY OF LOS ANGELES ) SS
CITY OF EL SEGUNDO )
I, Cindy Mortesen, City Clerk of the City of El Segundo, California, do hereby certify that the
whole number of members of the City Council of said City is five; that the foregoing Ordinance
No. 1455 was duly introduced by said City Council at a regular meeting held on the 2nd day
of November , 2010, and was duly passed and adopted by said City Council, approved
and signed by the Mayor, and attested to by the City Clerk, all at a regular meeting of said
Council held on the t 6th day of November, , 2010, and the same was so passed and
adopted by the following vote:
AYES: Busch, Fisher, Brann, Fuentes
NOES: None
ABSENT: Jacopson
ABSTAIN' Non¢
Mortesey', Qity C