HomeMy WebLinkAbout330.3NOTES:
1.NO CHANGE IN PIPE DIRECTION OR DIAMETER SHALL OCCUR WITHIN 36' OF THE VERTICAL BEND. BENDS, TEES, REDUCERS, ETC. BEYOND
THE 36' LIMIT MAY BE RESTRAINED BY STANDARD CONCRETE BLOCKING PER STD PLANS 330.1 AND 330.2.
2.FITTINGS SHALL BE POLYWRAPPED AFTER INSTALLATION OF PIPE CLAMPS AND ANCHOR RODS PRIOR TO POURING CONCRETE BLOCKING.
3.PIPE CLAMPS AND ANCHOR RODS SHALL BE INSTALLED PER STD PLAN 330.4.
4.JOINT RESTRAINT SHALL BE MEGALUG SERIES 1100 OR EQUAL.
5.WATER MAIN SHALL NOT BE PRESSURIZED UNTIL ALL TRENCHING WITHIN 100' OF VERTICAL BEND IS BACKFILLED AND COMPACTED TO
MINIMUM 3' COVER.
6.90° VERTICAL BENDS SHALL ONLY BE INSTALLED WHERE GIVEN PRIOR APPROVAL BY THE CITY.
7.ALL CONCRETE SHALL BE MECHANICALLY MIXED. JOB SITE MIXING, HAND-MIXED CONCRETE, AND MOBILE CONCRETE MIXERS ARE NOT
ALLOWED.
8.BACKFILL TRENCH BEYOND 90° VERTICAL BLOCK WITH CRUSHED SURFACING TOP COURSE MATERIAL COMPACTED TO 95% MDD. CRUSHED
BACKFILL SHALL EXTEND 20' BEYOND BLOCK OR TO FIRM BEARING TRENCH WALL, WHICHEVER IS LESS.
9.CONCRETE BLOCKING SHALL BE LEFT OPEN OR SHEETED FOR MINIMUM 24 HOURS.
MINIMUM DIMENSIONS
PIPE
SIZE BEND VOLUME
(CF)A D *L
4"
11 1 4°
BLOCKING NOT REQUIRED22 1 2°
45°
90°16 2.5'3 4"2.0'
6"
11 1 4°
BLOCKING NOT REQUIRED
22 1 2°
45°13 2.3'3 4"2.0'
90°43 3.5'3 4"2.0'
8"
11 1 4°
BLOCKING NOT REQUIRED
22 1 2°
45°33 3.2'3 4"2.0'
90°86 4.4'3 4"2.0'
10"
11 1 4°BLOCKING NOT REQUIRED
22 1 2°13 2.3'3 4"2.0'
45°64 4.0'3 4"2.0'
90°141 5.2'1"3.5'
12"
11 1 4°BLOCKING NOT REQUIRED
22 1 2°20 2.7'3 4"2.0'
45°111 4.8'3 4"2.0'
90°206 5.9'1 1 8"4.0'
* D = ANCHOR ROD DIAMETER
MINIMUM DIMENSIONS BASED ON FOLLOWING CONDITIONS:
• PIPE RESTRAINED MINIMUM 36' ON EACH SIDE OF BEND
• SAFE BEARING LOAD = 1,000 SF
• CONCRETE STRENGTH = 3,000 PSI
• CONCRETE WEIGHT = 150 PCF
• HYDROSTATIC PRESSURE = 200 PSI
• TRENCH = TYPE 2 FLAT BOTTOM TRENCH WITH LIGHTLY
CONSOLIDATED BACKFILL PER ANSI/AWWA C150/A21.50
• FACTOR OF SAFETY = 1.5
• SOIL FRICTIONAL RESISTANCE BASED ON COHESIVE
GRANULAR SOIL (GC+SC), SAND, GRAVEL, CLAY MIXTURE
CONCRETE BLOCKING DESIGN MUST BE ADJUSTED FOR
VARIANCES IN ANY OF THESE CONDITIONS.
45° BEND
L
L
A
A
A
A
L
L
11 1 4° AND 22 1 2 ° BENDS
PIPE CLAMP AND
ANCHOR ROD
PIPE CLAMP AND
ANCHOR ROD
A
A
L
L
90° BEND
PIPE CLAMP AND
ANCHOR ROD
PUBLIC WORKS
DEPARTMENT
APPROVED:
DATEMartin Pastucha
Public Works Administrator
CONCRETE BLOCKING
FOR VERTICAL FITTINGS
WITH RESTRAINED JOINTS
STD. PLAN - 330.3
6/28/2023