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CD-407 Precast Manhole, Type I Base, Frame & Cover CONCRETE BLOCK, 4'-6" SQUARE SIDED PARALLEL TO OR AT RIGHT ANGLES TO EDGE OF PAVEMENT. FORM VERTICAL EDGES AT TOP. CLASS "3" CONCRETE. - "1 PRECAST INLET SHALL BE SANTA ROSA CAST PRODUCTS DRAWING NO. M46E OR EQUIVALENT. NOTE: ORIENT ECCENTRIC CONE FOR STEPS SO THEY ARE NOT OVER A PIPE OPENING. GROUT FRAME AND COVER ,- GROUND SURF ACE <3 - f- x III 11 b <3 ~ '" III:~I- ~~ ~ 0::: W W o:::f- Z OW o I..L.~ U ~ u '00 0::: .1 d f- r<1 0::: r5 .0::: U X<l:: U <l::CD W ~: 00 -.;t- AC ROADWAY \ 48" DIAMETER " " " ' '. . ;. : ~ OUTLET PIPE 24" (MAX.) DIAMETER . .. :.., TWO #4 BARS EACH WAY " "<!<3' 'fl. . 4 ~ . 4 . 4 z ~ o .' ~~. .' <iT' :<1' . o I <f!4 4:3 .: 4 . :0. #4 BARS @ 12" 6" DIAMETER BASE J PRECAST MANHOLE WITH TYPE 1 BASE PRECAST MANHOLE, TYPE I BASE, FRAME & COVER SCALE: NOT TO SCALE DATE: SEPTEMBER 13, 2006 DRAWN BY: LDH V:\CAD\NEW STANDARDS APPROVED: ~k.J"'~ SHEET 1 OF J 'PUBLI WORKS DIRECTO CD-407 i- BLIND PICK HOLE MANHOLE FRAME SET SCREWS FOR EXTENSION RING. 3 REQUIRED EQUALLY SPACED ASTM GRID PATTERN j EDGE PRY HOLE GROUT HOLES (OPTIONAL) 4 - EQUALLY SPACED ...> -<9" 1/32" MACHINED SURFACES 26 1/4" 25 5/16" 1 3/8" ~ l l .1 .111 00 ......... ~ I. I. 24" 31 1/2" SECTION A-A TYPICAL FRAME AND COVER DETAIL PRECAST MANHOLE, TYPE I BASE, FRAME & COVER SCALE: NOT TO SCALE DATE: SEPTEMBER 13, 2006 DRAWN BY: LDH V:\CAD\NEW STANDARDS ~m,~ PUBLI WORKS DIRECTO SHEET 2 OF 3 CD-407 COVER RECESS TO RECEIVE SET SCREW EXTENSION RING TOP OF MANHOLE ~. : X tD<l:: ~ VARIES 1 1/2" TO 4" FRAME ~ RECESS TO RECEIVE SET SCREW AT 1/3 POINTS TYPICAL CAST IRON EXTENSION RING SEE NOTE 7 <.0 ~ ~6 f1----1\ BOTTOM OF MANHOLE : X N <l:: ~ ~ NOTES STEP DETAIL SEE NOTE 8 1. ALL REINFORCED CONCRETE SHALL BE CLASS "2" (590 LBS. PC PER CUBIC YARD). 2. ALL CONCRETE JOINTS SHALL BE CLEANED, WETTED, AND MORTARED PRIOR TO SETTING NEXT SECTION. JOINTS SHALL THEN BE PATCHED, TROWELED, AND BRUSHED SMOOTH. 3. TYPE I MANHOLE BASES ARE FOR USE WITH PIPES TO 24" IN DIAMETER AND WHERE THERE IS SUFFICIENT COVER TO USE MINIMUM LENGTH MANHOLE BARREL, ECCENTRIC CONE AND COVER FRAME. TYPE II MANHOLE BASES (STD. PLAN CD-408) ARE FOR USE WITH PIPES TO 42" IN DIAMETER. TYPE III MANHOLE BASES (STD PLAN CD-409) ARE FOR USE WITH PIPES TO 60" DIAMETER. MANHOLE BASES FOR PIPES LARGER THAN 60" IN DIAMETER SHALL REQUIRE A SPECIAL DESIGN. 4. FRAME AND EXTENSION RINGS MUST BE SECURED BY PAVEMENT OR CONCRETE BLOCK. 5. MANHOLE COVER FRAME SHALL BE ADJUSTED TO CONFORM TO GRADE AND CROSS SLOPE OF PAVEMENT. 6. MANHOLE FRAME AND COVER SHALL BE PHOENIX IRON (OAKLAND) MODEL P-1090 OR SOUTH BAY FOUNDRY (LODI) MODEL A-640 OR APPROVED EQUIVALENT. 7. USE OF EXTENSION RINGS IS LIMITED BY 18" MAXIMUM MANHOLE THROAT LENGTH. EXTENSION RINGS ARE ALLOWED FOR CONFORMS TO PAVEMENT OVERLAYS ONLY. 8. STEPS SHALL BE STEEL REINFORCED POLYPROPYLENE PLASTIC, SANTA ROSA CAST PRODUCTS CO. DWG. NO. PS2-PF OR EQUIVILANT. STEPS TO BE CAST IN PLACE OR PRESS FITTED INTO PROVIDED HOLES AS PER MANUFACTURER. INSTALL STEPS WITH LOWEST RUNG 1'-0" ABOVE THE FLOOR AND HIGHEST RUNG NOT MORE THAN 6" BELOW TOP OF MANHOLE. THE SPACING BETWEEN STEPS SHALL NOT EXCEED 1'-0" AND SHALL BE UNIFORM THROUGHOUT THE LENGTH OF THE WALL. PLACE STEPS IN THE WALL WITHOUT A PIPE OPENING. NO STEPS REQUIRED WHERE DISTANCE FROM FLOOR OF MANHOLE TO TOP OF MANHOLE IS LESS THAN 2'-6". PRECAST MANHOLE, TYPE I BASE, FRAME & COVER SCALE: NOT TO SCALE DATE: SEPTEMBER 13, 2006 DRAWN BY: LDH V:\CAD\NEW STANDARDS ~. ~ h~ ~ SHEET 3 OF 3 , PUBLI WORKS DIRECT CD-407