1、Designation:A74609(Reapproved 2014)Standard Specification forDuctile Iron Gravity Sewer Pipe1This standard is issued under the fixed designation A746;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers 4 to 64-in.ductile iron gravitysewer pipe centrifugally cast with push-on joints.This speci-fication may be used for pip
3、e with other types of joints,as maybe agreed upon at the time of purchase.1.2 This specification covers trench load design proceduresfor both cement-lined pipe and flexible-lined pipe.Maximumdepth of cover tables are included for both types of linings.1.3 The values stated in inch-pound units are to
4、 be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.2.Referenced Documents2.1 ASTM Standards:2D2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classificati
5、on System)D3282 Practice for Classification of Soils and Soil-Aggregate Mixtures for Highway Construction PurposesE8 Test Methods for Tension Testing of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing of Me-tallic Materials2.2 ANSI/AWWA Standards:C104/A21.4 Cement Mortar Lining for
6、 Ductile-Iron Pipeand Fittings for Water3C111/A21.11 Rubber-Gasket Joints for Ductile-Iron Pres-sure Pipe and Fittings3C150/A21.50 Thickness Design of Ductile-Iron Pipe3C600 Installation of Ductile-Iron Water Mains and TheirAppurtenances2.3 ASCE Standards:Manuals and Reports on Engineering Practice,
7、No.37,(WCPF Manual of Practice No.9).“Design andConstruction of Sanitary and Storm Sewers”42.4 AASHTO Standard:AASHTO T-99 Standard Method of Test for the Moisture-Density Relations of Soils Using a 5.5 lb(2.5 kg)Rammerand a 12 in.(305 mm)Drop3.Terminology3.1 Symbols:3.1.1 Aoutside radius of pipe,ft
8、5D24Sin metres5D2000D3.1.2 aconversion factor,lb/ft2to psi=144(kN/m2to kPa=1)3.1.3 B1.5 ft(0.457 m)3.1.4 bEffective pipe length:36 in.(0.914 m)3.1.5 Csurface load factor,Table 13.1.6 Doutside diameter,in.,Table 23.1.7 Emodulus of elasticity,24 106psi(165.5 106kPa)3.1.8 Emodulus of soil reaction,psi,
9、Table 33.1.9 Fimpact factor,1.53.1.10 fdesign bending stress,48 000 psi(331 103kPa)3.1.11 Hdepth of cover,ft(m)3.1.12 Kb bending moment coefficient,Table 33.1.13 Kx deflection coefficient,Table 33.1.14 Pwheel load,16 000 lb(7257 kg)3.1.15 Pe earth load,psi(kPa)3.1.16 Pt truck load,psi(kPa)3.1.17 Pv
10、trench load,psi(kPa)=Pe+Pt3.1.18 Rreduction factor which takes into account the factthat the part of the pipe directly below the wheels is aided in1This specification is under the jurisdiction of ASTM Committee A04 on IronCastings and is the direct responsibility of Subcommittee A04.12 on Pipes andT
11、ubes.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1977.Last previous edition approved in 2009 as A746 09.DOI:10.1520/A0746-09R14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book o
12、f ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from American Society of Civil Engineers(ASCE),1801 AlexanderBell Dr.
13、,Reston,VA 20191,http:/www.asce.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Surface Load Factors for Single Truck on Unpaved RoadDepthof CoverftPipe Sizein.34681012141618Surface Load FactorC2.50.05890.07130.10200.13280.161
14、50.19010.21780.24430.269830.04370.05300.07590.09900.12070.14240.16370.18430.204440.02650.03210.04600.06020.07360.08710.10050.11360.126550.01760.02130.03060.04010.04900.05810.06720.07610.084960.01250.01510.02170.02840.03480.04130.04780.05420.060670.00930.01130.01620.02120.02600.03080.03570.04050.0453
15、80.00720.00870.01250.01640.02010.02380.02760.03130.035090.00570.00690.00990.01300.01600.01900.02190.02490.0279100.00460.00560.00810.01060.01300.01540.01790.02030.0227120.00320.00390.00560.00740.00910.01080.01250.01420.0159140.00240.00290.00420.00550.00670.00800.00920.01050.0117160.00180.00220.00320.
16、00420.00510.00610.00710.00800.0090200.00120.00140.00200.00270.00330.00390.00450.00520.0058240.00080.00100.00140.00190.00230.00270.00320.00360.0040280.00060.00070.00100.00140.00170.00200.00230.00260.0030320.00050.00060.00080.00110.00130.00150.00180.00200.0023Depthof CoverftPipe Sizein.202430364248546064Surface Load FactorC2.50.29410.33900.39620.44370.48130.51150.53660.54880.559230.22370.26020.30850.35070.38570.41530.44120.45430.465740.13910.16350.19720.22840.25590.28080.30400.31640.327750.09360.1
