HomeMy WebLinkAbout221.20 (2022)GENERAL NOTES:
7" COUPLING BAND
12" OR 24" COUPLING BAND
MATERIAL TO BE ASTM A
36 1/4" PLATE GALVANIZED
AFTER FABRICATION PER
ASTM A123
all holes
3/4" diam.
slots to be
119/32 x 3/4"
SMOOTH COUPLING BAND
FOR SMOOTH PIPE
PLATE DETAIL
ANCHOR ASSEMBLY
CORRUGATED METAL PIPE
12"
3"
R1" (TYP.)R1" (TYP.)
2"
6 5/8"
4 1/8"
3/4"
7/8"
1 7/8"1 7/8"
4 1/2"4 1/2"
12"
PIPE STAKE (TYP.)
COUPLING BAND
WELD
PLATE (SEE DETAIL)
MATERIAL TO BE ASTM A36
GALVANIZED AFTER FABRICATION
PER ASTM A153
WELD
FLATTEN
TO POINT
1"
1 1/2" x 6' PIPE
STAKES EACH
SIDE OF CULVERT
1.THE SMOOTH COUPLING BAND SHALL BE USED IN COMBINATION
WITH CONCRETE PIPE.
2.CONCRETE PIPE WITHOUT BELL AND SPIGOT SHALL NOT BE
INSTALLED ON GRADES IN EXCESS OF 20%.
3.THE FIRST ANCHOR SHALL BE INSTALLED ON THE FIRST SECTION
OF THE LOWER END OF THE PIPE AND REMAINING ANCHORS
EVENLY SPACED THROUGHOUT THE INSTALLATION.
4.IF THE PIPE BEING INSTALLED HAS A MANHOLE OR CATCH BASIN
ON THE LOWER END OF THE PIPE, THE FIRST PIPE ANCHOR MAY
BE ELIMINATED.
5.WHEN CMP IS USED, THE ANCHORS MAY BE ATTACHED TO THE
COUPLING BANDS USED TO JOIN THE PIPE AS LONG AS THE
SPECIFIED SPACING IS NOT EXCEEDED.
6.ALL PIPE ANCHORS SHALL BE SECURELY INSTALLED BEFORE
BACKFILLING AROUND THE PIPE.
TABLE 4.2.1.A3 MAXIMUM PIPE SLOPES AND VELOCITIES
PIPE MATERIAL
PIPE SLOPE ABOVE
WHICH PIPE
ANCHORS REQUIRED
AND MIN. ANCHOR
SPACING
MAX. SLOPE
ALLOWED
MAX. VELOCITY AT
FULL FLOW
CMP, SPIRAL RIB, PVC1 20% (1 ANCHOR PER
100 LF OF PIPE)30%3 30 FPS
CONCRETE, CPE, OR PP1 10% (1 ANCHOR PER
50 LF OF PIPE)20%3 30 FPS
DUCTILE IRON2 20% (1 ANCHOR PER
PIPE SECTION)NONE NONE
SOLID WALL HDPE2
20% (1 ANCHOR PER
100 LF OF PIPE,
CROSS-SLOPE
INSTALLATIONS ONLY)
NONE NONE
NOTES:
1 THESE MATERIALS ARE NOT ALLOWED IN LANDSLIDE HAZARD AREAS.
2 BUTT-FUSED OR FLANGED PIPE JOINTS ARE REQUIRED; ABOVE GROUND INSTALLATION IS
RECOMMENDED ON SLOPES GREATER THAN 40%.
3 A MAXIMUM SLOPE OF 200% IS ALLOWED FOR THESE PIPE MATERIALS WITH NO JOINTS (ONE
SECTION), WITH STRUCTURES AT EACH END, AND WITH PROPER GROUTING
CORRUGATED METAL PIPE COUPLING
AND GENERAL PIPE ANCHOR ASSEMBLY
STD. PLAN - 221.20
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEGregg Zimmerman
Public Works Administrator
UNLESS OTHERWISE NOTED, DRAWING IS NOT TO SCALE (NTS)
DocuSign Envelope ID: 6EECF5B6-602A-4E4A-B436-A317AA638878
9/28/2018 | 9:45 AM PDT