Los Angeles City Wood Frame Prescriptive Provisions 2023

INFORMATION BULLETIN / PUBLIC – BUILDING CODE REFERENCE NO.: LARC Effective: 01-01-2017 DOCUMENT NO. P/BC 2023-004 Revised: 01-01-2023...

INFORMATION BULLETIN / PUBLIC – BUILDING CODE REFERENCE NO.: LARC Effective: 01-01-2017 DOCUMENT NO. P/BC 2023-004 Revised: 01-01-2023 Previously Issued As: P/BC 2013-004 WOOD FRAME PRESCRIPTIVE PROVISIONS ONE STORY RESIDENTIAL CONSTRUCTION ONLY (Formerly known as Type V Sheet) The wood frame prescriptive provisions are for one and two family dwellings and townhouses of wood frame construction, not exceeding one story in height. This Information Bulletin is for information and reference only and is not a substitute for accurate drawings prepared for each proposed construction project. LARC refers to the Los Angeles City Residential Code. The number following R references the code section within the Los Angeles City Residential Code. All buildings erected using provisions detailed herein must comply with restrictions listed below: a) Roof and floor boundary elements shall not cantilever past exterior wall line(s) below. b) This prescriptive provisions shall not be used for irregular structures located in Seismic Design Categories C, D0, D1, and D2 per 2023 LARC Section R301.2.2.2.5. FOOTINGS ON EXPANSIVE SOILS Footing systems on expansive soil shall be constructed in a manner that will minimize damage to the structure from movement of the soil. All soil in the City of Los Angeles is considered expansive unless proven otherwise by an approved soils report. 1. Depth of footings below the natural and finished grades shall not be less than 24 inches for exterior and 18 inches for interior footings. 2. Exterior walls and interior bearing walls shall be supported on continuous footings. 3. Footings shall be reinforced with four ½-inch diameter deformed reinforcing bars. Two bars shall be placed 4 inches from the bottom of the footing and two bars within 4 inches from the top of the footing. Reinforcement shall have a minimum 3-inch concrete cover for concrete cast against earth and reinforcement not exceeding 5/8-inch shall have minimum 1-1/2-inch concrete cover when not cast against earth. 4. Concrete floor slabs on grade shall be placed on a 4-inch fill of coarse aggregate or on a 2-inch sand bed covered with a minimum 6 mil moisture barrier membrane. The slabs shall be at least 3-1/2 inches thick and shall be reinforced with ½” diameter deformed reinforcing bars. Reinforcing bars shall be spaced at intervals not exceeding 16 inches each way. 5. The soil below an interior concrete slab shall be saturated with moisture to a depth of 18 inches prior to placing the concrete. 6. All drainage adjacent to footings shall be conducted away from the structure by a 3-ft wide sloped apron draining into an approved non-erosive device. ENERGY REQUIREMENTS All work must comply with the State of California Title 24 Energy Requirements. As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 1 of 9  P/BC 2020-004 ________________________________________________________________ 2x ROOF RAFTERS 1/2" WOOD STR. PANEL W/ 8d @ 6"/6"/12" 2x SOLID BLOCKING E.N. 8d@6"oc 1/2" WOOD STR. PANEL E.N. 8d@6"oc W/ 8d @ 6"/ 6"/ 12" oc (COMMON NAILS) 2X CEILING JOISTS 2x ROOF RAFTER W/ R-30 BATT. INSUL. 2X CEILING JOISTS 3" MINIMUM CEILING JOIST- LAP @ FASCIA BOARD W/ R-30 BATT. INSUL. BEARING WALLW/NAILS PER RAFTER RAFTER TIE CONNECTION TIE CONNECTION (SEE PAGE 3) (SEE PAGE3 ) 2X SOLID BLOCKING FOR EAVE LOCATION 2X SOLID BLOCKING W/ APPROVED FRAMING AND CONSTRUCTION W/ APPROVED FRAMING CLIPS EA. BLOCK SEE NOTE 13 ANCHOR EA. BLOCK 2X DOUBLE TOP PLATE INTERIOR BEARING WALL DOUBLE TOP PLATE R-13 + 10 (BATT + RIGID INSUL.) WHERE STUCCO IS APPLIED 7'-0" MIN. (HABITABLE ROOMS) OVER SHEATHING­ 2X4 STUD WALL @ 16"oc 10'-0" MAX STUD HEIGHT PROVIDE 2-LAYERS 30" MIN. (STUD GRADE) GRADE 'D' PAPER UNDER SEE NOTE 13 SEE NOTE 14 LATH 2X4 STUD WALL @ 16"oc 5/8" WOOD STR. PANEL EXTERIOR BEARING WALL (DF STUD GRADE- MINIMUM) W/10d @ 6"/ 6"/ 12" oc (COMMON NAILS) SEE NOTE 5 FOR WALL & OPENING R-13 + 10 (BATT + RIGID INSUL.) REQUIREMENTS SEE 2X FLOOR JOISTS @ 16"oc SEE NOTES 11, 12 & 13 15/32" WOOD STR. PANEL OR STUCCO SHEAR PANEL 2X BLOCKING @ 8'-0" oc FOR 2X P.T. SILL W/ 1/2" X 10" A.B. JOIST SPANS OVER 8'-0" 15/32" WOOD STR. PANEL @ 6'oc, 0.229" X 3" X 3" 2X SOLID BLOCKING OR STUCCO SHEAR PANEL PLATE WASHERS 2X P.T. SILL W/ PROPERTY LINE 3-1/2" CONC. SLAB, ANCHOR BOLTS AND R-19 BATT INSUL. #4 DEFORMED REINF. PLATE WASHERS @ 16" O.C. EA WAY 2X RIM JOIST 2" SAND BED, 6 MIL AT JOIST SPLICE 2X P.T. SILL W/ SEE NOTE 15 VAPOR RETARDER LAP 3" MIN. W/ 3-10d ANCHOR BOLTS AND PLATE WASHERS #3 DOWELS @ 24"OC, (2)-#4 BAR, TOP EXTEND 36" INTO SLAB (FOR TWO POUR) (2)-#4 BAR, BOTTOM T.O. CONC. T. O. CONCRETE 8" MIN FINISHED (2)-#4 BAR, TOP MIN. 4X GIRDER 8" GRADE (2)-#4 BAR, BOTTOM FINISHED GRADE 18" MIN. 4X4 P.T.POST 12" MIN. 6" W/ POST CAP FINISHED 24" 6" 24" MIN. 6" GRADE 3"CLR. 6" 24" 18" 3"CLR. 18" MIN. MIN. 6" 6" MIN. 12" 12" 12" SQ. PAD 12" UNDIST. GROUND POURED CONC. PIER W/ POST BASE WALL SECTION: SLAB-ON-GRADE CONSTRUCTION WALL SECTION: RAISED FLOOR CONSTRUCTION NOTES: 1. Anchor bolts ½” x 10" embedded 7" and spaced maximum 6' with 0.229" x 3" x 3"" plate washers, minimum 2 anchor bolts per piece, located not more than 12" or less than 7 bolt diameters from each end of the piece. 2. All foundation plates or sills and sleepers on a concrete or masonry slab, which is in direct contact with earth, and sills that rest on concrete or masonry foundations shall be preservative treated wood(AWPA U1) and field cut ends, notches, and drilled holes shall be field treated in accordance with AWPA M4. Fasteners (other than anchor bolts) in preservative treated wood or fire retardant treated wood shall be of hot dipped zinc coated galvanized steel or stainless steel. 3. Minimum concrete strength 2,500-psi. 4. Exterior walls, bearing walls and braced wall panels require continuous footings. R403.1 5. 23/32" plywood required for 24" joist spacing. 6. Where interior walls are shear walls, wall framing and sheathing shall extend to the roof sheathing. 7. Footings on or adjacent to slopes shall meet the requirements of Section R403.1.7. 8. Walls separating units in townhuses shall be provided with parapet in accordance with R302.2.2 9. Projects located in the Very High Fire Hazard Severity Zone (VHFHSZ) must also incorporate the requirements of Section R337 into the design. 10. Exterior walls of dwellings and accessory structures closer than 5-ft. (non-sprinklered) / 3-ft. (sprinklered) to the property line shall be 1-hr fire-resistance rated construction. 11. No openings other than approved foundation vents shall be permitted in the exterior walls of dwellings and accessory buildings where the exterior wall is less than 3-ft. to the property line. 12. The area of exterior wall openings of non-sprinklered dwellings and accessory buildings located = 3-ft. and < 5-ft. to the property line shall be limited to 25% of the wall area. Exterior wall openings are unlimited when exterior walls are located = 5-ft. for non-sprinklered buildings and = 3-ft. for sprinklered buildings. 13. Eaves shall be of 1-hr fire-resistive construction on the underside when located between 2-ft. and 5-ft. from the property line for non-sprinklered buildings and between 2-ft. and 3-ft. from the property line for sprinklered buildings. Detached garages within 2-ft of a property line may have a maximum 4-inch eave, provided the eave does not extend over the property line and is allowed by the Zoning Code. 14. Eaves shall not project more than 4" for each one foot of required side yard, and shall provide a minimum 30" clear space between the eave and the property line (LAMC 12.22C20(b)). 15. Exterior plaster (stucco) walls shall be provided with a corrosion resistant weep screed complying with Section R703.7.2.1 As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 2 of 9  P/BC 2023-004 ________________________________________________________________ Table 1 Table 2 ALLOWABLE SPANS FOR DF #2 ROOF ALLOWABLE SPANS FOR DF #2 ROOF RAFTERS (DF-LARCH) (T-R802.4.1(1)) RAFTERS (DF-LARCH) (T-R802.4.1(1)) Ceiling not attached to rafters, L/Δ = 180 Ceiling not attached to rafters, L/Δ = 180 Minimum Roof Slope: 3:12 Minimum Roof Slope: 3:12 Dead Load:10 psf (asphalt shingles or similar) Dead Load:20 psf (2” clay tile or similar) Live Load: 20 psf Live Load: 20 psf RAFTER SPACING ALLOWABLE RAFTER SPACING ALLOWABLE SIZE SPAN1 SIZE SPAN1 24” 11’-11” 24” 10’-4” 2x6 16” 14’-7” 2x6 16” 12’-7” 12” 16’-10” 12” 14’-7” 24” 13’-6” 24” 13’-0” 2x8 16” 18’-5” 2x8 16” 16’-0” 12” 21’-4” 12” 18’-5” 24” 18’-5” 24” 15’-11” 2x10 16” 22’-6” 2x10 16” 19’-6” Design as a truss system 12” 26’-0” 12” 22’-6” Minimum 3:12 slope 24” 21’-4” 24” 18’-6” 2x12 16” 26’-0” 2x12 16” 22’-7” 12” 26’-0” 12” 26’-0” Table 3 Table 4 ALLOWABLE SPANS FOR DF #2 ROOF ALLOWABLE SPANS FOR DF #2 ROOF RAFTERS (DF-LARCH) (T-R802.4.1(2)) RAFTERS (DF-LARCH) (T-R802.4.1(2)) Ceiling attached to rafters, L/Δ = 240 Ceiling attached to rafters, L/Δ = 240 Dead Load:10 psf (asphalt shingles or similar, Dead Load:20 psf (2” clay tile or similar, includes drywall and insulation) includes drywall and insulation) Live Load: 20 psf Live Load: 20 psf RAFTER SPACING ALLOWABLE JOIST SPACING ALLOWABLE SIZE SPAN1 SIZE SPAN1 24” 11’-11” 24” 10’-4” 2x6 16” 14’-1” 2x6 16” 12’-7” 12” 15’-6” 12” 14’-7” 24” 15’-1” 24” 13’-0” 2x8 16” 18’-5” 2x8 16” 16’-0” 12” 20-5” 12” 18’-5” 24” 18’-5” 24” 15’-11” 2x10 16” 22’-6” 2x10 16” 19’-6” Design as a post and 12” 26’-0” 12” 22’-6” beam 24” 21’-4” 24” 18’-6” 2x12 16” 26’-0” 2x12 16” 22’-7” 12” 26’-0” 12” 26’-0” 1. Rafter spans shall be measured along the horizontal projection of the rafter. Table 5 Table 6 ALLOWABLE SPANS FOR DF #2 CEILING RAFTER TIE CONNECTION JOISTS (DF-LARCH) (T-R802.5.1(2)) ROOF LIVE LOAD 20-psf [Table R802.5.2(1)]* Dead Load: 10 psf Live Load: 20 psf Minimum number of 16d common nails at rafter tie L/Δ = 240 connection. JOIST SPACING ALLOWABLE TIE ROOF SPAN (FT) RAFTER SIZE SPAN SLOPE SPACING 12 24 36 24” 7’-3” 16” 4 7 10 2x4 16” 8’-11” 3:12 12” 9’-10” 24” 5 10 15 24” 10’-8” 16” 3 5 8 2x6 16” 13’-0” 4:12 12” 15’-0” 24” 4 8 11 24” 13’-6” 16” 3 4 6 2x8 16” 16’-6” 5:12 12” 19’-1” 24” 3 6 9 24” 16’-5” 16” 3 3 5 2x10 16” 20’-2” 7:12 12” 23’-3” 24” 3 5 7 1. When nails are clinched, nailing may be reduced 25%. 2. The refer ties shall be minimum 2 x 4 As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 3 of 9  P/BC 2023-004 ________________________________________________________________ Table 7 Table 8 ALLOWABLE SPANS FOR DF #2 HEADERS FOR ALLOWABLE SPANS FOR DF #2 HEADERS FOR EXTERIOR BEARING WALLS INTERIOR BEARING WALLS Max. Roof/Ceiling Dead Load: 20 psf Max. Roof/Ceiling Dead Load: 20 psf Max Live Load 20 psf (T-R602.7(1))1, 2,3 Max Live Load 20 psf (T-R602.7(2))1, 2,3 12-ft 24-ft 36-ft 12-ft 24-ft 36-ft Building Building Building Building Building Building Width Width Width Width Width Width SIZE NJ NJ NJ SIZE NJ NJ NJ 6-ft 12-ft 18-ft 6-ft 12-ft 18-ft Tributary Tributary Tributary Tributary Tributary Tributary Width Width Width Width Width Width 2-2x6 6’- 0” 1 4’- 7” 1 3’- 10” 1 2-2x6 6’- 1” 1 4’-4” 1 3’- 6” 1 2-2x8 7’- 7” 1 5’- 9” 1 4’- 10” 2 2-2x8 7’- 9” 1 5’- 5” 1 4’- 5” 2 2-2x10 9’-0” 1 6’- 10” 2 5’- 9” 2 2-2x10 9’- 2” 1 6’- 6” 2 5’- 5” 2 2-2x12 10’- 7” 2 8’- 1” 2 6’- 10” 2 2-2x12 10’- 9” 1 7’- 7” 2 6’- 3” 2 3-2x8 9’- 5” 1 7’- 3” 1 6’- 1” 1 3-2x8 9’- 8” 1 6’- 10” 1 5’- 7” 1 3-2x10 11’- 3” 1 8’- 7” 1 7’-3” 2 3-2x10 11’- 5” 1 8’-1” 1 6’-7” 2 3-2x12 13’- 2” 1 10’-1” 2 8- 6” 2 3-2x12 13’- 6” 1 9’-6” 2 7-9” 2 1. Building width is perpendicular to ridge measured to exterior walls 2. NJ- Number of Jack Studs required to support each end of a header 3. Tributary width is the effective length that the member supports Table 9 Table 10 ALLOWABLE SPANS FOR DF #2 FLOOR ALLOWABLE SPANS FOR DF #2 FLOOR GIRDERS JOISTS (DF-LARCH) (T-R502.3.1(2)) SUPPORTING ONE FLOOR ONLY (T-R602.7(2)) Light Dead Load: 10 psf Max. Floor Dead Load: 15 psf 1, 2 Live Load: 40 psf 12-ft Building 24-ft Building 36-ft Building L/Δ = 360 Width Width Width SIZE 6-ft Tributary 12-ft Tributary 18-ft Tributary JOIST SPACING ALLOWABLE Width Width Width SIZE SPAN 24” 8’-3” 2-2x6 6’- 1” 4’- 4” 3’- 6” 2x6 16” 9’-9” 12” 10’-9” 2-2x8 7’- 9” 5’- 5” 4’- 5” 24” 10’-5” 2x8 16” 12’-9” 2-2x10 9’- 2” 6’- 6” 5’- 3” 12” 14’-2” 24” 12’-9” 2-2x12 10’- 9” 7’- 7” 6’- 3” 2x10 16” 15’-7” 12” 18’-0” 3-2x8 9’- 8” 6’- 10” 5’- 7” 24” 14’-9” 2x12 16” 18’-1” 3-2x10 11’- 5” 8’- 1” 6’- 7” 12” 20’-11” 3-2x12 13’- 6” 9’- 6” 7-9” 3 1. Building width is perpendicular to ridge measured to exterior walls 2. Minimum 4x post 3. Minimum 4x6 post for 36’ building width and 3-2x12 member. As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 4 of 9  P/BC 2023-004 ________________________________________________________________ ALLOWABLE SPANS AND LOADS FOR WOOD STRUCTURAL PANEL SHEATHING AND SINGLE-FLOOR GRADES CONTINUOUS OVER TWO OR MORE SPANS WITH STRENGTH AXIS PERPENDICULAR TO SUPPORTS NOTE: APPLIES TO PANELS 24” OR WIDER (T- R503.2.1.1(1)) SHEATHING GRADES ROOF FLOOR PANEL SPAN RATING MINIMUM MAXIMUM SPAN (INCHES) LOADS (PSF) MAX. SPAN (INCHES) Roof/Floor Span PANEL EDGE SUPPORT NO EDGE TOTAL LOAD LIVE LOAD Panel edges with THICKNESS SUPPORT tongue and groove (INCHES) joints or with blocking 24/0 3/8 24 20 40 30 24/16 7/16 24 24 50 40 16 32/16 15/32, 1/2 32 28 40 30 16 40/20 19/32, 5/8 40 32 40 30 20 48/24 23/32, 3/4 48 36 45 35 24 CONNECTION FASTENING REMARKS Roof Blocking between joists or rafters to top plate 4-8d box (2-1/2” x 0.113”) Toe nail Ceiling joist to plate 4-8d box (2-1/2” x 0.113”) Toe nail Ceiling Joist not attached to parallel rafter, laps over partitions 4-10d box (3” x 0.128”) Face nail Collar tie rafter, face nail or 1 ¼” 20-gage ridge strap 4-10d box (3” x 0.128”) Face nail Rafter or roof truss to plate 3-16d box nails (3-1/2” x 0.135”) or 2 toe nails on one side and 1 toe nail 3-10d common nails (3” x 0.148”) on opposite side of each rafter or truss 4-16d box (3-1/2” x 0.135”), or Toe nail Roof rafters to ridge, valley or hip rafters or roof rafter to minimum 3-10d common (3-1/2 ”x 0.148”) 2” ridge beam: 3-16d box (3-1/2” x 0.135”), or End nail 2-16d common (3-1/2” x 0.162”) Wall 16d common (3-1/2” x 0.162”) 24” o.c. face nail Stud to Stud (not braced wall panels) 10d box (3” x 0.128”) 16” o.c. face nail Stud to stud and abutting studs at intersecting wall corners (at 16d box (3-1/2” x 0.135”) 12” o.c. face nail braced wall panels) 16d common (3-1/2” x 0.162”) 16” o.c. face nail Abutting Studs at intersecting wall corners, face nail 16d (3-1/2” x 0.135)” 12” o.c. 16d common (3-1/2” x 0.162”) 16” o.c. each edge face nail Built –up header (2” to 2” header with ½” spacer) 16d box (3-1/2” x 0.135”) 12” o.c. each edge face nail Continuous header to stud 5-8d box (2-1/2” x 0.113”) Toe nail 4 8d common (2-1/2” x 0.131”) Toe nail 16 common (3-1/2 ” x 0.162”) 16” o.c. face nail Top plate to top plate 10d box (3” x 0.128”) 12” o.c. face nail Face nail on each side of end joint 8-16d (3-1/2” x 0.135”) Double top plate splice (minimum 24” lap splice length each side of joint Bottom plate to joist, rim joist, band joist or blocking (not at braced 16d common (3-1/2” x 0.162”) 16” o.c. face nail wall panels) 16d box (3-1/2” x 0.135)” 12” o.c. face nail Bottom plate to joist, rim joist, band joist or blocking (at braced 3-16d box (3-1/2” x 0.135”), or 3 each 16” o.c. face nail wall panel) 2-16d common (3-1/2” x 0.162”) 2 each 16” o.c. face nail 4-8d box (2-1/2” x 0.113”), or 3-16d box (3-1/2”x 0.135”), or toe nail 4-8d common (2-1/2” x 0.131)” Top or bottom plate to stud 3-16d box (3-1/2” x 0.135”), or 2-16d common (3 ½” x 0.135”), or End nail 2-10d (3” x 0.162”), or End nail 3-10d box (3” x 0.128”) 3-10d box (3” x 0.128”), or Top plates, lap at corners and intersections Face nail 2-16d common (3 1/2” x 0.162”) Floor 4-8d box (2-1/2” x 0.113”), or Joist to sill, top plate or girder 3-8d common (2-1/2” x 0.131), or Toenail 3-10d box (3” x 0.128”) 8d box (2-1/2” x 0.113”) 4” o.c. Rim Joist, band joist or blocking to sill or top plate (roof 8d common (2-1/2” x 0.131”), or applications also) 6” o.c. 10d box (3” x 0.128”) 3-16d common (3-1/2” x 0.162”), or Band or rim joist to joist End nail 4-10d box (3” x 0.128”) Nail each layer as follows: 32” o.c. at 20d common (4” x 0.192”), or top and bottom and staggered. 24” o.c. face nail at top and bottom 10d box (3” x 0.128”), or staggered on opposite sides Built-up girders and beams, 2-inch lumber layers AND: 2-20d common (4” x 0.192”), or Face nail at ends and at each splice 3-10d box (3” x 0.128”), 4-16d box (3-1/2 ”x 0.135”), or Ledger strip supporting joists or rafters 3-16d common (3-1/2” x 0.162), or At each joist or rafter, face nail 4-10d box (3” x 0.128”) Bridging to Joist 2-10d (3” x 0.128”) Each end, toe nail As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 5 of 9  P/BC 2023-004 ________________________________________________________________ D/6 MAX. D/3 MAX. D/6 MAX. D/4 MAX. 'D' 5/8" 'D' 'D' 5/8" MIN. MIN. D/4 MAX. D/3 MAX. 2" MIN. 40% MAX. 60% MAX. 25% MAX. 40% MAX. 2" MIN. 1/3 'D' 'D' EXTERIOR WALLS AND BEARING PARTITIONS NON-BEARING PARTITIONS NOTCHING & BORING RAFTERS, CEILING JOISTS AND FLOOR JOISTS EXTERIOR WALLS AND BEARING WALLS MAY HAVE BORED HOLES BETWEEN (NOTCHING NOT PERMITTED IN MIDDLE 1/3 JOIST SPAN) 40 AND 60 PERCENT WHEN STUD IS DOUBLED AND NOT MORE THAN TWO (HOLES SHALL NOT BE LOCATED WITHIN 2 IN OF A NOTCH) SUCCESSIVE DOUBLE STUDS ARE BORED (R502.8, R802.7.1 R602.6) 3:12 TO 4:12 SLOPE W/ 2-LAYERS TYPE 15 FELT B.N. 8d@6" OC 4:12 OR GREATER SLOPE W/ 1-LAYER TYPE 15 FELT 20 GA.x 1-1/4" 2-16d EACH SIDE ROOF RAFTER STRAP @48" O.C. ROOF SHEATHING B.N. 8d@6" OC ROOF RAFTER 2X BLOCKING 2X ROOF RAFTER EDGE NAIL 2X SLOPED ROOF RAFTER ROOF RAFTER 2 X RIDGE BOARD- DEEPER THAN 2X BLOCKING CUT END OF ROOF RAFTER EDGE NAIL 2X BLOCKING ROOF SLOPE-COMP SHINGLES (R905.2) RIDGE (R802.3) NAILS (TABLE R602.3(1)) W/ FRAMING ANCHOR EDGE NAIL 2X4 @ 4' O.C. 15/32" WOOD STRUCTURAL PANEL EDGE NAIL 3- 10d NAILS W/8d @ 6"/6"/12"(COMMON NAILS) RAFTER TIE CONNECTION (SEE PAGE 4) B.N. 8d@6" OC CEILING JOIST EDGE NAIL EDGE NAIL 2X CEILING JOIST EDGE NAIL UPLIFT FRAMING CLIP PER TABLE R802.11 2X BLOCKING W/ FRAMING PERPENDICULAR PARALLEL TO ANCHOR @ EACH BLOCKING TO ROOF RAFTERS ROOF RAFTERS BRACED WALL PANEL (SEE PAGE 6) INTERIOR SHEAR WALL AT ATTIC GABLE SUPPORT RAFTER SPAN (SEE PAGE 3) ENGINEERED DESIGNED REQUIRED FOR CONNECTION, WHEN PURLIN USED TO REDUCE RAFTER SPAN 2X RIDGE BOARD 2X ROOF RAFTERS 12 3 MIN. SLOPE NAIL TO JOIST 2X SOLID BLOCKING CEILING JOISTS (SEE PAGE 3) 2X DOUBLE TOP PLATE AT CEILING JOIST SPLICE PROVIDE 2X STUDS NAILS PER RAFTER TIE CONNECTIONS (SEE PAGE 3) BRACED RAFTER CONSTRUCTION (R802.5.1) BEARING PARTITION / INTERIOR SHEAR WALL CONT. DOUBLE TOP PLATE HEADER (SEE PAGE 3 FOR SPAN) SOLID BLKG. @ ALL UNSUPPORTED HEADER PLYWOOD EDGES (SEE PAGE 3 FOR SPAN) 10' MAX. 2X SILL PLATE ANCHOR BOLTS MIN 1/2" DIA. x 10", 7" EMBEDMENT MIN. 2 ANCHOR BOLTS PER BRACED WALL PANEL, MAX 12" & MIN. 4" FROM EACH END OF THE PLATE SECTION 2 #4 TOP & BOTTOM. HOLD DOWN EACH SIDE OF PANEL (1800# MIN. CAPACITY) PER PAGE 6 THICKEN FOOTING AS REQUIRED FOR BOLT EMBEDMENT DEPTH WALL FRAMING As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 6 of 9  P/BC 2023-004 ________________________________________________________________ c1 NOTES: 48" MIN. FOR METHOD WSP (c) 1. BRACED WALL LINES AT EXTERIOR WALLS SHALL HAVE A BRACED WALL AND PANEL LOCATED AT EACH END OF THE BRACED WALL LINE. 96" MIN. FOR GB (a,d) & PCP (b,d) EXCEPTION: FOR METHOD WSP (c) , THE BRACED WALL PANEL SHALL BE SEE NOTE 1. PERMITTED TO BEGIN NO MORE THAN 10 FEET FROM EACH END OF THE BRACED WALL LINE PROVIDED: METHOD WSP (c) H (HEIGHT OF PANEL) 10' MAX. UP TO 10' BRACING ONLY NO PENETRATIONS PERMITTED IN BRACED WALL PANELS A OR 24" A MIN. 24" PANEL IS APPLIED TO EACH SIDE. 24" THIS 24" WIDE PANEL DOES NOT COUNT AS BRACING BWL BWL BWL METHOD WSP UP TO 10' BRACING ONLY B BRACED WALL LINE LENGTH 4' MAX OFFSET DESIGNATED BRACED 4' MAX OFFSET WALL LINE (BWL) 25'-0" MAX. (TYP) BWL 1800 LBF HOLD-DOWN DEVICES REQUIRED AT THE ENDS OF EACH BRACED WALL PANEL 20'-0" MAX. 2. MIXING BRACING METHODS WITHIN A BRACED WALL LINE IS NOT PERMITTED. 3. INTERIOR BRACE WALL PANEL SHALL BE LOCATED NOT MORE THAN 10.0-FT BRACED WALL LINE LENGTH FROM THE END OF A BRACED WALL LINE AS DEMONSTRATED IN FIGURE R602.10.2.2 OF THE LARC. 4. HOLD-DOWN DEVICE SHALL BE APPROVED BY CURRENT LOS ANGELES CITY BRACED WALL PANEL REQUIREMENTS RESEARCH REPORT. BRACING REQUIREMENTS BASED ON SEISMIC DESIGN CATEGORY Roof/Ceiling Dead Load = 15-psf Minimum Total Length of Braced Wall Panels Required Wall Height = 10-ft Along each Braced Wall Line Floor Dead Load = 10-psf (ft) Braced Wall Line Spacing = 25-ft Seismic Design Braced Wall Line Story Location Methods GB a, d and PCP b, d Method WSP c Category (SDC) Length 10 8 4 20 16 5 SDC D2 30 24 7.5 40 32 10 50 40 12.5 (a). Method GB (Gypsum Board) = ½-in. minimum thickness gypsum board with 1-1/2-in. galvanized roofing nail, or 1-1/4-in. screws, Type W or S. for exterior sheathing, or 5d cooler nail, 0.086-in. diameter, 1-5/8-in. long, 15/64-in head for interior gypsum board. Maximum fastener spacing shall be 7-in. o.c. at panel edges, including top and bottom plates, and along intermediate supports. When method GB panels are applied to only one face of a braced wall panel, the minimum total length in the table shall be doubled. (b). Method PCP (Portland Cement Plaster) = 7/8-in. minimum thickness Portland cement plaster with 1-1/2-in., 11-gage, 7/16-in. head nails at 6-in. spacing (16-in stud spacing required). ½-in. minimum gypsum wallboard shall be installed on the side of the wall opposite the bracing material, except when the minimum total length of braced wall panel in the Table is multiplied by a factor of 1.5. (c). Method WSP (Wood Structural Panel) = 15/32-in. minimum thickness wood structural panel with 8d common (2-1/2-in x 0.131-in.) nails at 6-in. spacing along panel edges, 12-in. spacing at intermediate supports, and 3/8-in. distance to panel edge. ½-in. minimum thickness gypsum wall board shall be installed on the side of the wall opposite the bracing material, except when the minimum total length of braced wall panel in the Table is multiplied by a factor of 1.5. (d). Method GB and PCP braced wall panel height to width ratio (h/w) shall not exceed 1:1. (e). Multiply required braced wall panel lengths specified in the table by 1.2 when combined Roof Ceiling Dead load is between 15 psf and 25 psf. As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 7 of 9  P/BC 2023-004 ________________________________________________________________ TOP 1/3 PER. MANUF. RECOMENDATION SEISMIC STRAPS: TWO MIN. RECOMMENDATION PER MANUF. REFER TO IB P/PC 2017-003 FOR REQUIREMENTS EXTERIOR WALL FOR ROOF SLOPE: 24" MIN. T&P VALVE PIPED TO EXTERIOR 12" MIN. FLAT TO 6:12 3/4" MIN. PIPE. NO THREADS LISTED CAP ALLOWED IN BOTTOM PIPING BOTTOM 1/3 4" ROOF SLOPE: FLAT TO 6:12 24" MAX 6" MIN. IN GARAGE SEE LA MECHANICAL CODE SEC. 802.6 RAISE 18" FOR ROOF SLOPE STEEPER THAN 6:12 GARAGE FLOOR NOTE: NO GAS-FIRED WATER HEATER ALLOWED IN BEDROOMS, BATHROOMS, CLOTHES CLOSETS, OR ANY SPACE OPENING INTO A BEDROOM OR BATHROOM. WATER HEATERS WATER HEATER VENT AND ACCESS REQUIREMENTS 20" CLEAR THE FOLLOWING WINDOW SIZES WILL BE THE MINIMUM ALLOWED FOR 5.0 SF. 30" CLEAR 36" CLEAR OPENABLE SINGLE CASEMENT: 2-4 X 4-0, SLIDER: AREA 2-6 X 3-6 4-0 X 4-0 5-0 X 3-6 24" CLEAR DOUBLE CASEMENT: 4-8 X 4-0 44" MAX SINGLE/ DOUBLE HUNG: 6-0 X 3-0 OPENABLE CASEMENT/ FIXED COMBO: 7-0 X 4-0 3-0 X 5-0, 3-0 X 5-6 ,3-4 X 5-0, OTHER WINDOW TYPES: SLIDER/ FIXED COMBO: AREA 3-8 X 5-0, 4-0 X 5-0 AWNING & BAY W/ FIXED CENTER: 8-0 X 4-0 SINGLE/ FIXED COMBO: NONE W/O 10-0 X 4-0 NONE W/O MANUF. DATA MANUF. DATA 12-0 X 3-0 MIN. SIZE WINDOW MIN. SIZE WINDOW 44" MAX FOR 20" CLEAR WIDTH AND NOTE: SIZES ARE TAKEN FROM DATA SUPPLIED BY FOR 24" CLEAR HEIGHT AND 5.0 5.0 S.F. OPENABLE AREA WINDOW MANUFACTURERS. HOWEVER, THESE ARE S.F. OPENABLE AREA GENERAL DIMENSIONS AND MUST BE VERIFIED WITH FLOOR LEVEL ACTUAL WINDOWS INSTALLED TO MEET MINIMUM 1. 20" MIN. CLEAR WIDTH EGRESS REQUIREMENTS. 2. 24" MIN. CLEAR HEIGHT 3. 5.0 SF MIN. OPENABLE AREA AT GRADE-FLOOR ONLY, 5.7 SF MIN. ELSEWHERE. EMERGENCY ESCAPE/ RESCUE OPENING (R310) 1/2" MIN. CLEAR ON TOPS, SIDES AND ENDS CONC. FOUND. WALL FLOOR GIRDER 1:1 P.T. SILL 3" MIN. BEARING 1'-6" MIN. TRENCHES AT FOOTINGS GIRDER (R317.1 / R502.6) As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 8 of 9  P/BC 2023-004 ________________________________________________________________ MINIMUM ROOM DIMENSIONS: (R304 & R305) EMERGENCY ESCAPE / RESCUE WINDOW (SEE PAGE 7) 1. HABITABLE ROOMS SHALL HAVE A FLOOR AREA NOT LESS THAN 70 SF. 2. HABITABLE ROOMS SHALL NOT BE LESS THAN 7 FT. IN ANY HORIZONTAL DIMENSION. 3. HABITABLE SPACE, HALLWAYS, BATHROOMS, TOILET ROOMS, AND LAUNDRY ROOMS SHALL HAVE A CEILING HEIGHT OF NOT LESS THAN 7 FT. LIGHT: (R303) ALL ROOMS REQUIRE NATURAL LIGHT BY MEANS OF EXTERIOR WINDOWS OR SKYLIGHTS MIN. 8% OF THE FLOOR AREA OF THE ROOM. VENTILATION: (R303) ALL ROOMS REQUIRE NATURAL VENTILATION BY MEANS OF OPENABLE WINDOWS MIN. 4% OF THE FLOOR AREA OF THE ROOM. BATHROOMS, WATER CLOSET COMPARTMENTS AND SIMILAR ROOMS SHALL BE PROVIDED WITH AGGREGATE GLAZING AREA IN WINDOWS OF NOT LESS THAN 3 SQ. FT. ONE HALF OF WHICH MUST BE OPENABLE WHEN MECHANICAL VENTILATION IS NOT PROVIDED. SEE NOTE 2 (TYP.) UNDER-FLOOR SPACES SHALL BE VENTILATED BY OPENINGS INTO THE UNDER-FLOOR SPACE EXTERIOR WALLS. SUCH OPENINGS SHALL HAVE A NET AREA OF NOT LESS THAN 1 SQUARE FOOT FOR EACH 150 SQUARE FEET OF UNDER-FLOOR AREA. ONE VENTILATION OPENINGS SHALL BE LOCATED WITHIN SA 3-FT. OF EACH CORNER OF THE BUILDING AND PROVIDE CROSS VENTILATION. VENTILATION OPENINGS SHALL BE COVERED WITH CORROSION RESISTANT ALL WINDOWS WITHIN 24" OF MESH W/ LEAST DIMENSION NOT EXCEEDING 1/4". DOORS SHALL BE TEMPERED (R308.4) THE NET FREE VENTILATING AREA OF ENCLOSED ATTICS AND ENCLOSED RAFTER SPACES SHALL NOT BE LESS THAN 1/150 OF THE AREA OF THE SPACE VENTILATED, EXCEPT THAT REDUCTION OF TOTAL THE AREA TO 1/300 IS PERMITTED PROVIDED THAT AT LEAST 40% AND NOT MORE THAN 50% OF THE CMA REQUIRED VENTILATING AREA IS PROVIDED BY VENTILATORS LOCATED IN THE UPPER PORTION OF THE SPACE TO BE VENTILATED AND NOT MORE THAN 3 FT. DRYER VENT 4" Ø MIN.;14' MAX. BELOW THE RIDGE OR HIGHEST POINT OF THE SPACE MEASURED VERTICALLY SA WITH THE BALANCE OF THE REQUIRED VENTILATION PROVIDED BY EAVE OR W/ TWO 90° BENDS FOR METAL DUCT; CORNICE VENTS. A MINIMUM OF 1-INCH CLEARANCE SHALL BE PROVIDED 6' MAX. FOR FLEX DUCT CONNECTOR BETWEEN THE INSULATION AND ROOF SHEATHING. F 6' HIGH NONABSORBENT SURFACE @ SHOWER WALLS (R307.2) IF LESS THAN 60" ABOVE STANDING SURFACE (R308.4), TUB ACCESS BATHROOMS SHALL BE PROVIDED WITH 50 CFM WINDOWS AT SHOWERS & TUBS SHALL BE TEMPERED. INTERMITTENT VENTILATION EXHAUSTED 30" MIN. SA 12"X12" (PC 402.5) SHOWER DOORS SHALL SWING OUT. NET AREA OF SHOWER DIRECTLY TO THE OUTSIDE (R303.3) SA RECEPTOR SHALL BE MIN. 1024 SQ. IN. OF FLOOR AREA, AND ENCOMPASS 30 IN. Ø CIRCLE (PC 408.6) CMA 24" MIN. CLEAR IN SEE NOTE 2 (TYP.) FRONT OF TOILET (PC 402.5) 16"X24" UNDERFLOOR ACCESS THROUGH A PERIMETER WALL (R408.4) 18"X24" UNDERFLOOR ACCESS (R408.4) GLAZING SHALL MEET THE FOLLOWING: U-FACTOR = 0.32 MAX, SHGC - 0.25 MAX. GLAZING AREA LIMITS: 20% MAX OF TOTAL FLOOR AREA. 5% MAX OF THAT CAN BE WEST FACING. OTHERWISE PROVIDE TITLE 24 ENERGY CALCS. 22" X 30" ATTIC ACCESS, OR 30" X 30" IF FURNACE IS IN ATTIC. MIN SEE NOTE 4 HEADROOM OF 30". (R807.1, MC 304.1) DOOR SHALL BE A SELF-CLOSING & SELF-LATCHING 1-3/8" THICK SOLID WOOD OR SOLID OR HONEYCOMB CORE STEEL DOOR OR 20-MIN. FIRE RATED DOOR. (R302.5.1) NOTE: THE GARAGE SHALL NOT OPEN INTO A SLEEPING ROOM. 1 hour fire rated wall NOTES: 5/8" gyp type x. 1 hour fire rating 1. AN AUTOMATIC RESIDENTIAL FIRE SPRINKLER SHALL BE DESIGNED AND INSTALLED IN 1/2" GYPSUM BOARD TO ROOF LINE ACCORDANCE WITH SECTION R313.3 OR NFPA 13D FOR A NEW ONE- AND TWO-FAMILY (TABLE R302.6) DWELLING AND TOWNHOUSES. (R313) 2. CARBON MONOXIDE ALARMS (CMA) AND SMOKE ALARMS (SA) ARE REQUIRED FOR ALTERATIONS, REPAIRS OR ADDITIONS WHERE A PERMIT VALUATION EXCEEDS $1,000: A. CARBON MONOXIDE ALARMS SHALL BE PROVIDED IN EXISTING DWELLINGS OR SLEEPING PIPE BOLLARD OR OTHER UNITS THAT HAVE ATTACHED GARAGES OR FUEL-BURNING APPLIANCES. LOCATE SUCH PROTECTIVE MEASURE WHEN APPLIANCES ARE ALARMS OUTSIDE OF EACH SEPARATE DWELLING UNIT SLEEPING AREA IN THE 18' MIN. CLR. SUBJECT TO DAMAGE IMMEDIATE VICINITY OF THE BEDROOM(S). 3" MIN. DIA. B. SMOKE ALARMS SHALL BE INSTALLED IN EACH SLEEPING ROOM AND OUTSIDE OF EACH SEPARATE SLEEPING AREA IN THE IMMEDIATE VICINITY OF THE BEDROOM(S). 3. GARAGE FLOOR SURFACE SHALL BE OF APPROVED NON-COMBUSTIBLE MATERIAL. (R309) 4. DUCTS PENETRATING WALLS OR CEILINGS SEPARATING THE DWELLING FROM THE GARAGE SHALL BE CONSTRUCTED OF A MIN. 26 GAGE SHEET STEEL OR APPROVED MATERIAL.(R302.5) 5. EVERY INTERIOR DOOR IN A DOORWAY THROUGH WHICH OCCUPANTS PASS SHALL HAVE A (SEE NOTE 3) MINIMUM WIDTH OF 32" *PC = LOS ANGELES PLUMBING CODE 16' CLR. WIDTH *MC = LOS ANGELES MECHANICAL CODE As a covered entity under Title II of the Americans with Disabilities Act, the City of Los Angeles does not discriminate on the basis of disability and, upon request, will provide reasonable accommodation to ensure equal access to its programs, services and activities. Page 9 of 9