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: � : . . i TREADS & R/SERS: � TNE HE/GHT OF R/SERS SHALL NOT EXCEED 7 3/4 /NCHES, AND TREAD (EXCLUS/VE OF NOS/NG) SHALL BE NO LESS THAN 10 /NCHES W/DE. TREADS W/TN A NOSING ARE ALLOWED A MAX. PROJECTION OF 1 INCH OVER THE LEI�EL IMMEDlATELY BELOW THAT TREAD. OPEN R/SERS ARE PERM/TTED, PROVIDED THAT TNE OPEN/NG BE7WEEN TREADS DOES NOT PERM/T TNE PASSAGE OF A 4-INCH D/AMETER SPHERE. HANDRA/LS: R311.7.7 HANDRAlLS - HANDRA/LS SNALL BE PROVIDED ON AT LEAST ONE SIDE OF EACN CONTINUOUS RUN OF TREADS OR FLIGHT WITH FOUR OR MORE RISERS. R311.7.7.1 HEIGHT - HANDRAIL NEIGHT, MEASURED �ERTICALLY FROM SLOPED PLANE ADJOININ� THE TREAD NOSING, OR FINISH SURFACE OF THE R.4MP SLOPE, SNALL BE NOT LESS THAN 34 /NCHES AND NOT MORE THAN 38 /NCHES. R311.7.7.2 CONT/NUITY - HANDRA/LS FOR STA/RWAYS SHALL BE CONT/NUOUS FOR THE FULL LENGTN OF THE FLI�HT, FROM A POINT DIRECTLY ABOI/E THE TOP RISER OF THE FLIGNT TO A POINT DIRECTLY AB01/E THE LOWEST RISER OF THE FUGHT. HAILRAILS ENDS SHALL BE RETURNED OR SHALL TERMINATE lN NEWEL POSTS OR SAFE7Y TERMINALS. HANDR.4/LS ADJACENT TO A WALL SN,4LL HAVE A SPACE OF NOT LESS THAN 1 1/2 /NCH BETWEEN THE WALL AND THE HANDRAILS 8311.7.7.3 GRIP-SIZE - ALL REQUIRED HANDR.4/LS SNALL BE ONE OF THE FOLLOWING 7YPES OR PROVIDE EqUII/ALENT GRASPABILITY. 1) 7YPE l. NANDR.4/LS WITN CIRCULAR CROSS SECTION SHALL HAVE AN OUTSIDE DIAMETER OF AT LEAST 1 1/4 INCHES AND NOT GREATER THAN 2 /NCHES. lF THE NANDRAIL lS NOT CIRCULAR, IT SHALL NAI/E A PERIMETER DIMENSION OF AT LEAST 4 INCHES AND NOT GREATER THAN 6 1/4 /NCHES WITH A MAXIMUM CROSS SECTION OF THE DlMENSION OF 2 1/4 /NCHES. EDGES SHALL N,4VE A MlNIMUM RADIUS OF0.01 /NCH. 2) TYPE lL NANDRAILS WITH A PERIMETER GREATER THAN 6 1/4 /NCHES SHALL HAVE A GRASPABLE FlNGER RECESS AREA ON BOTH SIDES OF THE PROFILE. THE FINGER RECESS SNALL BEGIN WITHIN A DISTANCE OF 3/4 /NCH MEASURED l/ERTICALLY FROM THE TALLEST POR770N OF THE PROFILE AND ACHIEVE A DEPTH OF AT LEAST 5/16 /NCH WITHIN 7/8 /NCH BELOW THE WIDEST POR770N OF THE PROFILE. THE REQUIRED DEPTH SHALL CONTINUE FOR AT LEAST 3/8 INCN TO A LEYEL TNAT lS NOT LESS TNAN 1 3/4 INCNES BELOW THE TALLEST PORTION OF THE PROFlLE. THE MlNIMUM WIDTN OF THE HANDR.4/L ABOVE THE RECESS SHALL BE 1 1/4 /NCHES TO A MAXIMUM OF 2 3/4 INCHES. EDGES SHALL HAI/E A M!NIMUM RADIUS OF 0.01 /NCH. R311.7.7.4 EXTER/OR WOODfPLAST/C COMPOSITE GUARDS - WOOD/PLASTIC COMPOSlTE GUAROS SHALL COMPLY WITH THE PROVISIONS OF SECTION R317.4 GUARORAILS: R312.i WHERE RE�JIRED - GUARDS SHALL BE LOCATED ALONG OPEN-SIDED WALKING SURFAC£S, INCLUDING STAIRS, R.4MPS AND LANDINGS, THAT ARE LOCATED MORE THAN 30.INCHES-MEASURED VERTICALLY TO THE FLOOR OR GRADE BELOW AT ANY POINT WITHIN.36 /NCHES HORIZONTALLY TO THE ED�E OF THE OPEN SIDE. INSECT SCREENlNG SHALL NOT BE CONSIDERED AS A GUARD. R312.2 HEIGHT - REQUIRED GUARDS AT OPEN-SIDED WALKING SURFACES, INCLUDlNG STAIRS. PORCHES, BALCONIES OR LANDINGS, SHALL BE NOT LESS THAN 36 /NCHES HIGN MEASURED VERTICALLY ABOVE THE ADJACENT WALKING SURFACE, ADJACENT FIXED SEATJNG OR THE LINE CONNECTING THE LEADING EDGES OF-=THE TREADS. 8312.3 OPEN/NG LIMITATIONS - REQUIRED GUARO SH,ALL lyOT=l=IAVE OP.ENINGS FROM TNE WALK/NG SURFACE TO THE REQUIRED GUARD NEIG1-lT WHICH ALLOW PASSAGE OF A SPHERE 4 INCHES lN OIAMETER. -_ -- - . � 8312 4 EXTER/OR WOODfPLA.snr COMPOS/TE GUAROS - WOOD/PLAS77C COMPOSI E CUARDS SHALL COMPLY WITN THE PROVI 191�/5 OF-SEC�IO R3�74= - _-- - : - � �- ,- _ -- - _ _- -" :C��,��I ��' DA VID NORRIS ENGINE£RING _ � 112 COLEMAN RD. WINTFR HAVEN, FL 33880 (863) 299-f04B P.E. 32186 Pg. 5-B C.A. 8283