ASTM_F_1309_-_98_2012.pdf

Designation:F130998(Reapproved 2012)An American National StandardStandard Practice forInstallation Procedures for Fitting Chocks to MarineMachinery Foundations1This standard is issued under the fixed designation F1309;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the acceptable methods of fittingchocks to marine machinery foundations.1.2 The values stated in SI units shall be regarded asstandard.The values in parentheses are for information only.1.3This standard does not purport to address the safetyconcerns associated with its use.It is the responsibility of theuser of this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsD638 Test Method for Tensile Properties of PlasticsD648 Test Method for Deflection Temperature of PlasticsUnder Flexural Load in the Edgewise PositionD695 Test Method for Compressive Properties of RigidPlastics2.2 Other Documents:American Bureau of Shipping Rules for Building andClassing Steel Vessels3American Welding Society Publication,AWS D1.1 Struc-tural Welding Code43.Significance and Use3.1 This practice provides the three principal methods offitting chocks to marine machinery foundations to ensure thatthe machinery is free of vibration and perfectly aligned afterinstallation.3.1.1 The three principal methods of installing chocksdescribed herein are as follows:3.1.1.1 Type AEpoxy-based resin,nonshrinking Chock-fast Orange PR 610 TCF by Philadelphia Resin Corp.,or equal,and3.1.1.2 Type BTwo-piece wedge chocks.3.1.1.3 Type CSolid,one-piece fitted chocks.4.Procedure4.1 General Requirements for Types A,B,and C ChockingSystems:4.1.1 Machining:4.1.1.1 Type A chocks,machinery bedplates,foundationplates,and bolts do not require finish machining if the chocksare not designed to be removed.Unless specified otherwise,Types B and C chock,bolts/studs,machinery bedplate,foun-dation plates,and fitted holes need to be finished machined andfitted.4.1.1.2 Surfaces in way of the chock areas on the machinerybedplate and the foundation plate may be machined beforeinstallation or while the ship is not waterborne,or both.4.1.1.3 Unless otherwise specified,all finished surfacesshall be finished to a maximum of 0.003mm roughness heightaverage(RHA).4.1.1.4 Finished areas on the machinery bedplate and thefoundation plate in way of the chocks shall be sufficientlygreater in size than the chock to prevent interference from theunfinished area with the chock during installation.4.1.1.5 Spotface hole edge radius shall be such that therewill not be any interference between it and the bolt head-to-shank radius.The spotface area shall be sufficiently greater inarea than that of the bolt head or nut so as not to cause any1This practice is under the jurisdiction of ASTM Committee F25 on Ships andMarine Technology and is the direct responsibility of Subcommittee F25.03 onOutfitting and Deck Machinery.Current edition approved Oct.1,2012.Published October 2012.Originallyapproved in 1990.Last previous edition approved in 2007 as F1309-98(2007).DOI:10.1520/F1309-98R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American Bureau of Shipping(ABS),ABS Plaza,16855Northchase Dr.,Houston,TX 77060,http:/www.eagle.org.4Available from American Welding Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126,http:/www.aws.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 interference when tightening or with the tooling used.Thespotface surfaces shall be perpendicular to the finished fittedhole centerline.4.1.2 Installation:4.1.2.1 The ship must be waterborne and fairly well com-pleted before final alignment is accomplished.Ship shall betrimmed as close to the even keel position as practicable.Thesame trim position shall be maintained throughout the align-ment procedure.No heavyweight shall be moved,loaded,orunloaded during alignment;ramps for Ro-Ros shall not belowered or hoisted.4.1.2.2 Final machining of the fitted or bearing areas of themachinery bedplate to chock to foundation plate and themating areas of the fitted portion of the bolt/stud shank and tothe hole wall shall be a minimum of 85%uniformly distrib-uted around the mating area.A light coat of Prussian blue shallbe used to check the contact areas.4.1.2.3 Machinery shall be aligned using a sufficient numberof jackscrews,shims,and wedges to accommodat