Item 30 - 4th and Mortimer Mixed-Use Development Project Located at 409 and 509 East Fourth Street

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LVSUPDN 2.2%125.00'124.70'12'-10"4'-0"STAIR WIDTH10'-3"14'-8" RUN (16) 11" T 7'-9 1/2"4'-8 3/4"23'-4 1/4"7'-11 1/2" 23" MIN 2'-7"1'-4 1/4"7'-6"8'-1 1/4"12'-10"1A5-738.8A8.99BCC.2S8S7S4S5S9S1322AD-71S12"EXIT RAMP UP"S11S12"EXIT"20AD-33(TYP. ALL LEVELS)3-HRS10S1817AD-71.1LVDNUP12'-10"4'-0"STAIR WIDTH5'-1 1/2"8'-7 1/2" LANDING 23'-4 1/4"7'-11 1/2"5'-1 1/2"23" MIN 12" MIN 2'-7"9'-10 1/4" LANDING 4'-8 3/4"8'-1 1/4"12'-10"1A5-738.8A8.99BCC.2S8S7S4S5S9S1322AD-71S12S10"EXIT STAIR DOWN"S11S1017AD-71.1LV144.96' FS9.08' CH144.96'DNUP12'-10"4'-0"STAIR WIDTH5'-1 1/2"15'-7" RUN (17) 11" T 23'-4 1/4"7'-11 1/2"5'-1 1/2"23" MIN 12" MIN 2'-7"4'-8 3/4"8'-1 1/4"12'-10"1A5-738.8A8.99BCC.2S8S7S4S5S9S138'-7 1/2" LANDING 7'-1 1/4" LANDING 22AD-71S12"EXIT STAIR DOWN"S11S10S12S1117AD-71.13'LVDN12'-10"4'-0"STAIR WIDTH5'-1 1/2"9'-7" 22'-10 3/4"7'-11 1/2"5'-1 1/2"12" MIN 2'-7"4'-8 3/4"8'-1 1/4"12'-10"1A5-738.8A8.99BCC.2S8S4S5S9S137'-1 1/4" LANDING S1422AD-71S12"EXIT STAIR DOWN"S11S10S12S1117AD-71.1S15ROOF HATCH W/GUARDRAIL ANDSELF-CLOSINGGATE.13'1A5-738.8A8.99BCC.210AD-61.1S22CCOPYRIGHTIt is the clients responsibility prior to or during construction to notify the architect in writingof any perceived errors or omissions in the plans and specifications of which a contractorthoroughly knowledgeable with the building codes and methods of construction shouldreasonably be aware. Written instructions addressing such perceived errors or omissionsshall be received from the architect prior to the client or clients subcontractors proceedingwith the work. The client will be responsible for any defects in construction if theseprocedures are not followed.Architecture + Planning17911 Von Karman Ave.Suite 200Irvine, CA 92614ktgy.com949.851.2133License StampProject Contact:Email:Principal: Project Designer:Project Director:KTGY Project No:2017-0934Debbie Hollanddholland@ktgy.comWil WongD. SchoolmeesterDebbie HollandDeveloperPHONE NO.4199 CAMPUS DRIVEIRVINE, CA 92612(714) 342-2502415 & 515 E. 4TH STREET, SANTA ANA, CA 92701 4TH AND MORTIMERNo.Date Description06-21-2023 FIFTH BUILDING DEPARTMENT SUBMITTALA03-21-23ADDENDUM ASTAIR A2 ENLARGEDPLANSA5-72SCALE:11/4"=1'-0"STAIR PLAN LEVEL 11.FOR TYPICAL STAIR DETAILS, REFER TO2.TREADS: ALL TREAD SURFACES SHALL BE SLIP RESISTANT. TREADS SHALL HAVE SMOOTH,ROUNDED OR CHAMFERED EXPOSED EDGES AND NO ABRUPT EDGES AT THE NOSING.3.TREAD AND RISER DIMENSIONAL UNIFORMITY: STAIR TREADS AND RISERS SHALL BE OFUNIFORM SIZE AND SHAPE. THE TOLERANCE BETWEEN THE LARGEST AND SMALLEST RISERHEIGHT OR BETWEEN THE LARGEST AND SMALLEST TREAD DEPTH SHALL NOT EXCEED0.375 INCH IN ANY FLIGHT OF STAIRS.4.TREAD PROFILE: THE RADIUS OF THE LEADING EDGE OF THE TREAD SHALL BE NOTGREATER THAN 0.5 INCH. BEVELING OF NOSING SHALL NOT EXCEED 0.5 INCH. RISERS SHALLBE SOLID AND VERTICAL OR SLOPED FROM THE UNDERSIDE OF THE LEADING EDGE OF THETREAD ABOVE AT AN ANGLE NOT MORE THAN 30 DEGREES FROM THE VERTICAL. THELEADING EDGE (NOSING) OF TREADS SHALL PROJECT NOT MORE THAN 1.25 INCHESBEYOND THE TREAD BELOW AND ALL PROJECTIONS OF THE LEADING EDGES SHALL BE OFUNIFORM SIZE, INCLUDING THE LEADING EDGE OF THE FLOOR AT THE TOP OF A FLIGHT.5.HANDRAIL CONTINUITY: HANDRAIL-GRIPPING SURFACES SHALL BE CONTINUOUS, WITHOUTINTERRUPTION BY NEWEL POSTS OR OTHER OBSTRUCTIONS.6.HANDRAIL EXTENSIONS: HANDRAILS SHALL RETURN TO THE WALL, GUARD OR THE WALKINGSURFACE OR SHALL BE CONTINUOUS TO THE HANDRAIL OF AN ADJACENT STAIR FLIGHT. ATSTAIRWAYS WHERE HANDRAILS ARE NOT CONTINUOUS BETWEEN FLIGHTS, THE HANDRAILSSHALL EXTEND AT LEAST 12 INCHES BEYOND THE TOP RISER AND 12 INCHES, PLUS THETREAD WIDTH, BEYOND THE BOTTOM RISER. WHERE THE STAIRS ARE CONTINUOUS FROMLANDING TO LANDING, THE INNER RAIL SHALL BE CONTINUOUS AND NEED NOT EXTEND OUTINTO THE LANDING.7.EXIT ENCLOSURE PENETRATIONS: PENETRATIONS INTO AND OPENINGS THROUGH AN EXITENCLOSURE ARE PROHIBITED EXCEPT FOR REQUIRED EXIT DOORS, SPRINKLER PIPING,STANDPIPES, ELECTRICAL RACEWAY(S) FOR FIRE DEPARTMENT COMMUNICATION SYSTEMSAND ELECTRICAL RACEWAY(S) SERVING THE EXIT ENCLOSURE. THERE SHALL BE NOPENETRATIONS OR COMMUNICATION OPENINGS, WHETHER PROTECTED OR NOT, BETWEENADJACENT EXIT ENCLOSURES.8.STRIPING FOR THE VISUALLY IMPAIRED: INTERIOR EXIT STAIRWAYS SHALL HAVE THE UPPERAPPROACH AND LOWER TREAD MARKED BY A STRIPE PROVIDING CLEAR VISUAL CONTRAST.EXTERIOR EXIT STAIRWAYS SHALL HAVE STRIPES ON THE UPPER APPROACH AND ON ALLTREADS. THE STRIPE SHALL BE A MINIMUM OF 2 INCHES WIDE TO A MAXIMUM OF 4 INCHESWIDE PLACED PARALLEL TO, AND NOT MORE THAN 1 INCH FROM, THE NOSE OF THE STEPOR UPPER APPROACH. THE STRIPE SHALL EXTEND THE FULL WIDTH OF THE STEP ORUPPER APPROACH AND SHALL BE OF MATERIAL THAT IS AT LEAST AS SLIP-RESISTANT ASTHE OTHER TREADS OF THE STAIR. A PAINTED STRIPE SHALL BE ACCEPTABLE.9.ALL DIMENSIONS ARE TO THE FACE OF STUD, CMU OR CONCRETE AS OCCURS, U.N.O.STANDPIPESTAIR NOTESLEGEND-AD-71STAIR KEYNOTESS1S2S3S4S5S6S7S8S9S10S11S12S13S14S15S16S17S18S19S20S21S2221AD-7117AD-7118AD-71HANDRAIL - 34" MIN TO 38" MAX ABOVE TREAD NOSING PER CBC 1012.2. MAX. 4.5"PROJECTION INTO REQURED WIDTH PER CBC 1012.8.GUARD - 42" MIN HIGH RAILING w/ OPENINGS SPACED SO A 4" SPHERE CANNOT PASSTHROUGHGUARDWALL - 42" MIN HIGHSECURITY SCREEN SYSTEM- 1" STEEL BAR TOP AND BOTTOM RAILS WITH 1/4" PICKETS AT 4"O.C.- MOUNT TO FLOOR SLAB OR STAIR STRINGERS- PROVIDE 1/4" SQ. , 9 GAUGE WIRE MESH ASNOTED ON PLANBARRIER GUARDRAIL - 27" H, BELOW STAIRSLIP-RESISTANT WARNING STRIPE AT TOP APPROACH AND BOTTOM TREADSTAIRWAY IDENTIFICATION SIGNTACTILE FLOOR DESIGNATION SIGNTACTILE EXIT SIGNSTANDPIPE - CLASS IALTERNATING TREAD DEVICESTAIR LANDING : STAIR CONSTRUCTIONPLYWOOD TREAD AND RISER2X WOOD STRINGER - REFER TO STRUCTURAL PLANSWOOD FRAMED LANDING - REFER TO STRUCTURAL PLANSCAST-IN-PLACE CONCRETE STAIRDASHED ARC INDICATING 44" CLEAR PATH ABOUT STAIR / HANDRAIL, PER CBC 1011.2KNOX BOX - SEE BUILDING PLANSMETAL STAIR GATE BARRIER - PER CBC 1023.823AD-71STEEL CHANNEL STRINGER1-PIECE SLIP RESISTANT PRE-CAST CONC TREAD AND RISERS20aDASHED ARC INDICATING 48" CLEAR PATH ABOUT STAIR / HANDRAIL, PER CBC 1011.2NYSTROM ROOF HATCH WITH INTEGRAL OSHA COMPLIANT ALUMINUM SAFETY RAILS (POWDERCOATSAFETY YELLOW) - SEE STAIR ROOF LEVEL FOR OPENING SIZES23PER CBC SEC. 1011.6 THE DOOR AT ANY POSITION SHALL NOT REDUCE THE REQUIRED STAIRLANDING DIMENSION TO LESS THAN ONE-HALF ITS REQUIRED WIDTH. - CLEAR SPACE IS SHOWN ONPLAN WITH DASHED ARC.-AD-71.130" x48" CLEAR FLOOR AREA5'-0" DIAMETER TURN AROUND SPACEENLARGED PLAN REFERENCES1.FOR WALL FIRE-RATINGS AND DETAIL REFERENCES, FIRE EXTINGUISHERLOCATIONS AND FIRE ACCESS ANALYSIS, SEE SHEETS A0-11 THRU A0-25 .2.FOR EXITING ANALYSIS INCLUDING OCCUPANT LOADS, EXIT SIGNS AND DOOR PANICHARDWARE LOCATIONS, SEE SHEETS A0-31 THRU A0-45.EXTENT OF EXTERIOR CEMENT PLASTER FINISHDIAGONAL HATCH INDICATES EXTENT OF EXTERIOR PLASTER SOFFIT ORDROPPED GYP. BD. CEILING BELOW RATED FLOOR/CEILING ASSEMBLY. SOFFITHEIGHT AS INDICATED IN PLAN. EXTERIOR CEMENT PLASTER OVER EXTRUDEDMETAL LATH OCCURS AT LOBBIES WITH EXTERIOR WALL OPENINGS. SEEENLARGED PLANS FOR EXTENT.CMU WALL - SEE STRUCTURALCONCRETE WALL - SEE STRUCTURAL18AD-61.1S24SIGN INDICATING DOOR AS A DETECTABLE WARNING2X4 WALL (1-1/2"x3-1/2" METAL STUD AT TYPE 1A CONSTRUCTION, 2X4FIRE-RETARDANT TREATED WOOD STUD AT ALL OTHER LOCATIONS)2X6 WALL (1-1/2"x5-1/2" METAL STUD AT TYPE 1A CONSTRUCTION, 2X6FIRE-RETARDANT TREATED WOOD STUD AT ALL OTHER LOCATIONS)SCALE:21/4"=1'-0"STAIR PLAN LEVEL 2SCALE:31/4"=1'-0"STAIR PLAN LEVEL 3, 4SCALE:41/4"=1'-0"STAIR PLAN LEVEL 5SCALE:51/4"=1'-0"STAIR PLAN ROOF LEVELSCALE:61/4"=1'-0"NOT USEDAAAAAAAAAAAAAAAAAAAA06-21-23