HomeMy WebLinkAboutCD-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.
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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
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48" DIAMETER " "
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OUTLET PIPE 24"
(MAX.) DIAMETER
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TWO #4 BARS EACH WAY
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#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:
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'PUBLI WORKS DIRECTO CD-407
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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
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1/32" MACHINED SURFACES
26 1/4"
25 5/16"
1 3/8"
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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
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PUBLI WORKS DIRECTO
SHEET 2 OF 3
CD-407
COVER
RECESS TO RECEIVE
SET SCREW
EXTENSION RING
TOP OF MANHOLE
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VARIES
1 1/2" TO 4"
FRAME ~ RECESS TO RECEIVE SET
SCREW AT 1/3 POINTS
TYPICAL CAST IRON
EXTENSION RING
SEE NOTE 7
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BOTTOM OF
MANHOLE
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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