This document provides specifications and dimensions for thrust restraint details for water main pipelines. It includes tables with the minimum restrained lengths of pipe and dimensions for thrust blocks and retainer glands for various pipe sizes and fittings. Notes provide additional guidance on determining required restraint sizes for non-standard conditions, approved restraint methods, concrete placement, and other construction requirements.
Rocky Mount Greenville Willson Regional Transit Plan
Reducer 01
1. DEAD ENDS 3.8 4.92.6 5.9 7.0 9.0 10.0 11.0 12.9
END VIEW
END VIEWPLAN
PIPE SIZE
PLAN END VIEW
PLAN
PLAN END VIEW
90n BEND THRUST BLOCK
45n BEND THRUST BLOCK
WIDTH HEIGHT
700 3504 NPS
1000 5006 NPS
1300 6508 NPS
1600 80010 NPS
1800 100012 NPS
14 NPS 2200 1100
PIPE SIZE WIDTH HEIGHT
2500 125016 NPS
2800 140018 NPS
3200 150020 NPS
3800 180024 NPS
WIDTH
PIPE SIZE WIDTH HEIGHT
600 2504 NPS
800 3506 NPS
1000 5008 NPS
1200 60010 NPS
1400 70012 NPS
14 NPS 1600 800
PIPE SIZE WIDTH HEIGHT
1700 100016 NPS
2200 100018 NPS
2200 120020 NPS
2700 140024 NPS
PIPE SIZE WIDTH HEIGHT
350 2004 NPS
600 2506 NPS
700 3508 NPS
900 40010 NPS
1000 50012 NPS
14 NPS 1100 600
PIPE SIZE WIDTH HEIGHT
1400 65016 NPS
1500 75018 NPS
1500 90020 NPS
1900 100024 NPS
WIDTH
WIDTH
NOTES:
PLAN END VIEW
PIPE SIZE WIDTH HEIGHT
300 1254 NPS
350 2006 NPS
500 2508 NPS
600 30010 NPS
700 35012 NPS
14 NPS 900 400
PIPE SIZE WIDTH HEIGHT
1000 50016 NPS
1100 50018 NPS
1100 60020 NPS
1400 70024 NPS
WIDTH
WIDTH
PIPE SIZE WIDTH HEIGHT
600 3004 NPS
900 4006 NPS
1000 6008 NPS
1300 70010 NPS
1600 80012 NPS
14 NPS 1700 1000
PIPE SIZE WIDTH HEIGHT
2000 110016 NPS
2300 120018 NPS
2600 130020 NPS
3100 160024 NPS
END VIEWPLAN
WIDTH HEIGHT
450
700
550
800
600
1000
WIDTH HEIGHT
900
700
1350
1200
REDUCER THRUST BLOCK
SIZE SIZE
6x4 NPS
8x4 NPS
8x6 NPS
10x6 NPS
10x8 NPS
12x6 NPS
12x8 NPS
12x10 NPS
16x8 NPS
16x10 NPS
WIDTH
1050
1550
1200
2000
1750
20x16 NPS
24x16 NPS
16x12 NPS
20x12 NPS
24x12 NPS
24x20 NPS
450
700
550
800
600
1000
900
700 1350
1350
1200
1050
1550
1200
2000
1750
1350
* DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10
* DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10* DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10
* DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10
* DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10 * DIMENSIONS ARE FOR STANDARD CONDITIONS, SEE NOTE 10
8.0
FITTING
0.6
0.9
0.9
1.9
4.7
1.1
1.1
5.5
0.4
0.4
0.9
2.1
1.5
3.2
7.8
2.0
4.1
1.7
3.5
8.5
2.9
7.0
0.6
1.2
3.8
1.6
0.8
0.8
1.4
9.9
1.4 1.5 1.7 1.9
4 NPS 6 NPS 8 NPS 10 NPS 12 NPS 16 NPS 18 NPS 20 NPS 24 NPS
MINIMUM RESTRAINED LENGTH OF PIPE (m) LR
2.3
3.0
14 NPS
2.6
6.2
1.2
1.2
TEEv/vDEAD END THRUST BLOCK
NOTE* FOR POLYETHYLENE WRAPPED PIPE, MULTIPLY VALUES IN TABLE BY 1.45
HEIGHT HEIGHT
HEIGHT
HEIGHT
HEIGHT
HEIGHT
MIN
300
MIN
300
MIN
300
MIN
300
MIN
300
MINIMUM
300
NOTE* PVC PIPE WILL TYPICALLY HAVE SLIGHTLY GREATER RESTRAINED LENGTH.
USE WIDTH = 1.0m, HEIGHT = 0.5m (AREA = 0.5s)
FOR 690 kPa, AREA = 0.98 X (690/1380) = 0.49s
AREA REQUIRED AT 1380 kPa IS 1.4m X 0.7m = 0.98s
FROM TABLE "45n BEND THRUST BLOCK"
PRESSURE:
EXAMPLE: FIND THRUST BLOCK DIMENSION FOR 12 NPS 45n BEND WITH 690 kPa TEST
A FACTOR OF THE SPECIFIC VALUE DIVIDED BY THE STANDARD VALUE.
TO DETERMINE REQUIRED SIZES FOR DIFFERENT CONDITIONS, MULTIPLY THE DIMENSION BY
SUBMIT CALCULATIONS TO THE ENGINEER FOR APPROVAL OF RESTRAINT LENGTH CHOSEN.
FOR INSTALLATIONS NOT MEETING THE CONDITIONS OF NOTE 10, THE CONTRACTOR SHALL
1440 kg/z SOIL UNIT WEIGHT
96 kPa SOIL BEARING CAPACITY
1380 kPa WATER SYSTEM TEST PRESSURE
1.5 m DEPTH OF COVER
1.5 SAFETY FACTOR
BASED UPON THE FOLLOWING STANDARD CONDITIONS:
THRUST BLOCKS SIZES AND MINIMUM RESTRAINED LENGTHS SHOWN ON THESE SHEETS ARE
CONTRACT DOCUMENTS.
SHEETS WILL BE DESIGNED ON A CASE BY CASE BASIS, AND WILL BE SHOWN IN THE
THRUST RESTRAINT FOR SIZES OVER 24 NPS OR FOR FITTINGS NOT SHOWN ON THESE
THE BELLS, WHICHEVER IS SMALLER.
MINIMUM THICKNESS ALONG THE FITTING AXIS SHALL BE 300mm OR THE LENGTH BETWEEN
FOR REDUCERS, BEARING AREA SHALL BE PERPENDICULAR TO THE FITTING AXIS. THE
FOR TEES, BEARING AREA SHALL BE PERPENDICULAR TO THE BRANCH (SINGLE LEG) AXIS.
FITTING MIDPOINT.
FOR BENDS, BEARING AREA SHALL BE PARALLEL TO THE EDGE OF THE FITTING AT THE
FOR THRUST BLOCKS SHALL BE POURED AGAINST UNDISTURBED SOIL.
OVER PIPE OR FITTINGS TO PREVENT CONCRETE FROM ADHERING TO SURFACES. CONCRETE
JOINT OR RESTRAINT HARDWARE. PLASTIC SHEETING OR BUILDING FELT MAY BE PLACED
CONCRETE FOR THRUST BLOCKS SHALL NOT BE ALLOWED TO COVER OR INTERFERE WITH
TECHNIQUES.
THE EXCAVATION OR PLACE TYPE G CONCRETE USING APPROPRIATE UNDERWATER PLACEMENT
CLASS A CONCRETE SHALL NOT BE PLACED UNDER WATER. THE CONTRACTOR SHALL DEWATER
AND SHALL WITHSTAND THE MAXIMUM PRESSURE APPLIED TO THE SYSTEM.
FROM THE CENTER OF THE FITTING, AS SHOWN ON THESE SHEETS SHALL BE RESTRAINED,
JOINTS, EACH JOINT THAT FALLS WITHIN THE MINIMUM RESTRAINED LENGTH, MEASURED
IF THE OWNER OF THE WATER SYSTEM REQUIRES A METHOD THAT RESTRAINS INDIVIDUAL
SELECTED SHALL BE APPROVED BY THE SYSTEM OWNER.
ARE ALL ACCEPTABLE METHODS TO NYSDOT. HOWEVER, THE THRUST RESTRAINT METHOD
SHEETS. THRUST BLOCKS, RESTRAINED JOINTS USING TIE RODS, OR RETAINER GLANDS
THRUST RESTRAINT USING THRUST BLOCKS OR RESTRAINED LENGTHS ARE SHOWN ON THESE
APPURTENANCES" FOR ADDITIONAL INFORMATION ON THRUST RESTRAINT REQUIREMENTS.
SEE SPECIAL NOTES ENTITLED "OWNER REQUIREMENTS FOR WATER MAINS AND
12.
11.
10.
9.
8.
7.
6.
5.
4.
3.
2.
1.
BENDS
HORIZONTAL
90n
45n
22n
11n
METRIC STANDARD SHEET
NOTE: ALL DIMENSIONS IN MILLIMETERS UNLESS OTHERWISE NOTED
(DESIGN)
DEPUTY CHIEF ENGINEER
DEPARTMENT OF TRANSPORTATION
STATE OF NEW YORK
WATER MAIN
HORIZONTAL THRUST RESTRAINT DETAILS
ISSUED UNDER EB 11-025
EFFECTIVE DATE: 05/03/2012
BEND THRUST BLOCK22 n
BEND THRUST BLOCK11 n
/S/ RICHARD W. LEE, P.E.
APPROVED NOVEMBER 1, 2011
