ASTM F1309-23
(Practice)Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations
Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations
SIGNIFICANCE AND USE
3.1 This practice provides the three principal methods of fitting chocks to marine machinery foundations to ensure that the machinery is free of vibration and perfectly aligned after installation.
3.1.1 The three principal methods of installing chocks described herein are as follows:
3.1.1.1 Type A—Epoxy-based resin, nonshrinking, and
3.1.1.2 Type B—Two-piece wedge chocks.
3.1.1.3 Type C—Solid, one-piece fitted chocks.
SCOPE
1.1 This practice covers the acceptable methods of fitting chocks to marine machinery foundations.
1.2 The values stated in SI units shall be regarded as standard. The values in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 30-Jun-2023
- Technical Committee
- F25 - Ships and Marine Technology
- Drafting Committee
- F25.03 - Outfitting and Deck Machinery
Relations
- Effective Date
- 01-Mar-2024
- Effective Date
- 01-Jul-2019
- Effective Date
- 01-Apr-2018
- Refers
ASTM A370-17a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products - Effective Date
- 15-Nov-2017
- Effective Date
- 01-Jan-2017
- Effective Date
- 01-Nov-2015
- Effective Date
- 15-May-2014
- Effective Date
- 15-Nov-2013
- Refers
ASTM A370-12a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products - Effective Date
- 15-Oct-2012
- Effective Date
- 15-Mar-2012
- Refers
ASTM A370-11a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products - Effective Date
- 15-Nov-2011
- Effective Date
- 15-Jun-2010
- Effective Date
- 15-May-2010
- Effective Date
- 01-Apr-2010
- Refers
ASTM A370-09a - Standard Test Methods and Definitions for Mechanical Testing of Steel Products - Effective Date
- 01-Jun-2009
Overview
ASTM F1309-23: Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations provides comprehensive guidelines for the correct installation of chocks to marine machinery foundations. Developed by ASTM International Committee F25 on Ships and Marine Technology, this standard is crucial for achieving machinery alignment, minimizing vibration, and ensuring long-term operational stability in shipboard environments. It standardizes methods that facilitate safety, efficiency, and durability across the marine industry.
Key Topics
Principal Methods of Fitting Chocks:
Type A: Epoxy-Based Resin Chocks
- Uses nonshrinking, pourable epoxy resins.
- Resin is poured into contained volumes, cures at ambient temperature, and forms durable solid chocks.
- Facilitates easier future removal using a release agent on contact surfaces.
Type B: Two-Piece Wedge Chocks
- Fabricated from medium steel or material of similar strength.
- Comprised of two interlocking wedge components, machined to fit precisely.
- Allows fine alignment adjustment via the wedges.
Type C: Solid One-Piece Fitted Chocks
- Machined from steel plate or approved alternatives.
- Precisely fitted to the machinery bedplate and foundation, ensuring high bearing coverage and structural integrity.
General Installation Requirements:
- Proper alignment of ship machinery requires the ship to be waterborne and stable prior to final chock installation.
- Machined surfaces must meet strict smoothness and dimensional standards for optimal fit.
- Bolt and chock installation must prevent relative movement due to operational vibrations and sea conditions.
- Bolts should be correctly torqued to manufacturer or industry recommendations.
- Where welding is involved, the American Welding Society (AWS D1.1) and American Bureau of Shipping rules must be followed.
- Testing (when specified) on steel and resin chocks includes tensile, compressive, and shock resistance tests as per referenced ASTM methods.
Applications
Practical Uses of ASTM F1309-23:
- Shipbuilding and Retrofit: Ensures accurate and reliable mounting of engines, generators, and other marine machinery on new builds or during refurbishments.
- Vessel Machinery Maintenance: Provides standardized techniques for removing and replacing chocks to correct alignment or repair issues.
- Vibration Reduction: Application of these standardized installation practices minimizes machinery vibration, extending equipment lifespan and improving operational safety.
- Compliance and Safety: Using this standard assists shipyards and operators in meeting classification society requirements and international quality benchmarks.
Related Standards
Organizations implementing ASTM F1309-23 may also reference:
- ASTM A370: Test Methods for Mechanical Testing of Steel Products
- ASTM D638: Tensile Properties of Plastics
- ASTM D648: Deflection Temperature of Plastics Under Flexural Load
- ASTM D695: Compressive Properties of Rigid Plastics
- American Welding Society AWS D1.1: Structural Welding Code
- American Bureau of Shipping (ABS) Rules: Building and Classing Steel Vessels
- MIL-S-901: Shock Tests for Shipboard Machinery and Equipment (when specified)
Summary
Utilizing ASTM F1309-23 ensures marine machinery is fitted with chocks that are properly aligned, securely fastened, and vibration-resistant. This standard optimizes performance, maintains compliance, and supports safety in marine engineering applications globally. For marine professionals, adherence to this standard is integral to achieving long-lasting and maintenance-friendly machinery installations.
Buy Documents
ASTM F1309-23 - Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations
REDLINE ASTM F1309-23 - Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations
Get Certified
Connect with accredited certification bodies for this standard
DNV
DNV is an independent assurance and risk management provider.
Lloyd's Register
Lloyd's Register is a global professional services organisation specialising in engineering and technology.
ABS Quality Evaluations Inc.
American Bureau of Shipping quality certification.
Sponsored listings
Frequently Asked Questions
ASTM F1309-23 is a standard published by ASTM International. Its full title is "Standard Practice for Installation Procedures for Fitting Chocks to Marine Machinery Foundations". This standard covers: SIGNIFICANCE AND USE 3.1 This practice provides the three principal methods of fitting chocks to marine machinery foundations to ensure that the machinery is free of vibration and perfectly aligned after installation. 3.1.1 The three principal methods of installing chocks described herein are as follows: 3.1.1.1 Type A—Epoxy-based resin, nonshrinking, and 3.1.1.2 Type B—Two-piece wedge chocks. 3.1.1.3 Type C—Solid, one-piece fitted chocks. SCOPE 1.1 This practice covers the acceptable methods of fitting chocks to marine machinery foundations. 1.2 The values stated in SI units shall be regarded as standard. The values in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
SIGNIFICANCE AND USE 3.1 This practice provides the three principal methods of fitting chocks to marine machinery foundations to ensure that the machinery is free of vibration and perfectly aligned after installation. 3.1.1 The three principal methods of installing chocks described herein are as follows: 3.1.1.1 Type A—Epoxy-based resin, nonshrinking, and 3.1.1.2 Type B—Two-piece wedge chocks. 3.1.1.3 Type C—Solid, one-piece fitted chocks. SCOPE 1.1 This practice covers the acceptable methods of fitting chocks to marine machinery foundations. 1.2 The values stated in SI units shall be regarded as standard. The values in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM F1309-23 is classified under the following ICS (International Classification for Standards) categories: 47.020.20 - Marine engines and propulsion systems. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM F1309-23 has the following relationships with other standards: It is inter standard links to ASTM A370-24, ASTM A370-19, ASTM D648-18, ASTM A370-17a, ASTM A370-17, ASTM A370-15, ASTM A370-14, ASTM A370-13, ASTM A370-12a, ASTM A370-12, ASTM A370-11a, ASTM A370-10, ASTM D638-10, ASTM D695-10, ASTM A370-09a. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM F1309-23 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F1309 − 23 An American National Standard
Standard Practice for
Installation Procedures for Fitting Chocks to Marine
Machinery Foundations
This standard is issued under the fixed designation F1309; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope American Welding Society Publication, AWS D1.1 Struc-
tural Welding Code
1.1 This practice covers the acceptable methods of fitting
chocks to marine machinery foundations.
3. Significance and Use
1.2 The values stated in SI units shall be regarded as
3.1 This practice provides the three principal methods of
standard. The values in parentheses are for information only.
fitting chocks to marine machinery foundations to ensure that
1.3 This standard does not purport to address all of the
the machinery is free of vibration and perfectly aligned after
safety concerns, if any, associated with its use. It is the
installation.
responsibility of the user of this standard to establish appro-
3.1.1 The three principal methods of installing chocks
priate safety, health, and environmental practices and deter-
described herein are as follows:
mine the applicability of regulatory limitations prior to use.
3.1.1.1 Type A—Epoxy-based resin, nonshrinking, and
1.4 This international standard was developed in accor-
3.1.1.2 Type B—Two-piece wedge chocks.
dance with internationally recognized principles on standard-
3.1.1.3 Type C—Solid, one-piece fitted chocks.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Procedure
mendations issued by the World Trade Organization Technical
4.1 General Requirements for Types A, B, and C Chocking
Barriers to Trade (TBT) Committee.
Systems:
2. Referenced Documents
4.1.1 Machining:
4.1.1.1 Type A chocks, machinery bedplates, foundation
2.1 ASTM Standards:
plates, and bolts do not require finish machining if the chocks
A370 Test Methods and Definitions for Mechanical Testing
are not designed to be removed. Unless specified otherwise,
of Steel Products
Types B and C chock, bolts/studs, machinery bedplate, foun-
D638 Test Method for Tensile Properties of Plastics
dation plates, and fitted holes need to be finished machined and
D648 Test Method for Deflection Temperature of Plastics
fitted.
Under Flexural Load in the Edgewise Position
4.1.1.2 Surfaces in way of the chock areas on the machinery
D695 Test Method for Compressive Properties of Rigid
bedplate and the foundation plate may be machined before
Plastics
installation or while the ship is not waterborne, or both.
2.2 Other Documents:
4.1.1.3 Unless otherwise specified, all finished surfaces
American Bureau of Shipping Rules for Building and
shall be finished to a maximum of 0.003–mm roughness height
Classing Steel Vessels
average (RHA).
4.1.1.4 Finished areas on the machinery bedplate and the
foundation plate in way of the chocks shall be sufficiently
greater in size than the chock to prevent interference from the
This practice is under the jurisdiction of ASTM Committee F25 on Ships and
unfinished area with the chock during installation.
Marine Technology and is the direct responsibility of Subcommittee F25.03 on
4.1.1.5 Spotface hole edge radius shall be such that there
Outfitting and Deck Machinery.
Current edition approved July 1, 2023. Published July 2023. Originally approved
will not be any interference between it and the bolt head-to-
in 1990. Last previous edition approved in 2018 as F1309 – 98 (2018). DOI:
shank radius. The spotface area shall be sufficiently greater in
10.1520/F1309-23.
area than that of the bolt head or nut so as not to cause any
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855 Available from American Welding Society (AWS), 8669 NW 36 St., #130,
Northchase Dr., Houston, TX 77060, http://www.eagle.org. Miami, FL 33166-6672, http://www.aws.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1309 − 23
interference when tightening or with the tooling used. The 4.2.1 Provision for Future Machinery Removal—To prevent
spotface surfaces shall be perpendicular to the finished fitted adhesion of chocks to adjoining surfaces and facilitate future
hole centerline. removal of machinery, spray an aerosol release agent on all
contact surfaces. This precaution allows these chocks to be
4.1.2 Installation:
removed in a similar manner to steel chocks.
4.1.2.1 The ship must be waterborne and fairly well com-
4.2.2 Applicable Techniques:
pleted before final alignment is accomplished. Ship shall be
trimmed as close to the even keel position as practicable. The
4.2.2.1 Position dams to retain the compound during pour-
same trim position shall be maintained throughout the align- ing and curing without distortion. Damming materials may be
ment procedure. No heavyweight shall be moved, loaded, or
expanded plastic, foam rubber stripping and sheet metal, or
unloaded during alignment; ramps for Ro-Ros shall not be light gage flat bar. (See Fig. 1.)
lowered or hoisted.
4.2.2.2 Follow resin manufacturer’s instructions including
4.1.2.2 Final machining of the fitted or bearing areas of the the relative design parameters on loading, temperature, allow-
machinery bedplate to chock to foundation plate and the
able thickness, additional design, installation, bolt tension, and
mating areas of the fitted portion of the bolt/stud shank and to
inspection.
the hole wall shall be a minimum of 85 % uniformly distrib-
4.2.3 Foundation Bolts—Install hold-down bolts before
uted around the mating area. A light coat of Prussian blue shall
pouring of resin. Tension (torque) bolts only after resin
be used to check the contact areas.
manufacturer’s recommended cure time.
4.1.2.3 Machinery shall be aligned using a sufficient number
4.3 Type B, Two-Piece Wedge Chock—The two-piece
of jackscrews, shims, and wedges to accommodate adequate
wedges are drop-forged, medium steel or machined from steel
up-down, port-starboard, and fore-aft movement without dis-
plate of equal strength or of other materials as specified.
torting the machinery bedplate or foundation plate and, once
4.3.1 Applicable Techniques—Fig. 3 indicates the configu-
aligned, be able to hold that alignment firmly during the final
ration of Type B chocks to the machinery bedplate and the
chock installation and bolt-fitting phase.
foundation plate.
4.1.2.4 A sufficient number of fitted bolts and
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1309 − 98 (Reapproved 2018) F1309 − 23 An American National Standard
Standard Practice for
Installation Procedures for Fitting Chocks to Marine
Machinery Foundations
This standard is issued under the fixed designation F1309; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers the acceptable methods of fitting chocks to marine machinery foundations.
1.2 The values stated in SI units shall be regarded as standard. The values in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D695 Test Method for Compressive Properties of Rigid Plastics
2.2 Other Documents:
American Bureau of Shipping Rules for Building and Classing Steel Vessels
This practice is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.03 on Outfitting
and Deck Machinery.
Current edition approved April 1, 2018July 1, 2023. Published May 2018July 2023. Originally approved in 1990. Last previous edition approved in 20122018 as
F1309 – 98 (2012).(2018). DOI: 10.1520/F1309-98R18.10.1520/F1309-23.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855 Northchase Dr., Houston, TX 77060, http://www.eagle.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1309 − 23
American Welding Society Publication, AWS D1.1 Structural Welding Code
3. Significance and Use
3.1 This practice provides the three principal methods of fitting chocks to marine machinery foundations to ensure that the
machinery is free of vibration and perfectly aligned after installation.
3.1.1 The three principal methods of installing chocks described herein are as follows:
3.1.1.1 Type A—Epoxy-based resin, nonshrinking Chockfast Orange PR 610 TCF by Philadelphia Resin Corp., or equal,
nonshrinking, and
3.1.1.2 Type B—Two-piece wedge chocks.
3.1.1.3 Type C—Solid, one-piece fitted chocks.
4. Procedure
4.1 General Requirements for Types A, B, and C Chocking Systems:
4.1.1 Machining:
4.1.1.1 Type A chocks, machinery bedplates, foundation plates, and bolts do not require finish machining if the chocks are not
designed to be removed. Unless specified otherwise, Types B and C chock, bolts/studs, machinery bedplate, foundation plates, and
fitted holes need to be finished machined and fitted.
4.1.1.2 Surfaces in way of the chock areas on the machinery bedplate and the foundation plate may be machined before installation
or while the ship is not waterborne, or both.
4.1.1.3 Unless otherwise specified, all finished surfaces shall be finished to a maximum of 0.003–mm roughness height average
(RHA).
4.1.1.4 Finished areas on the machinery bedplate and the foundation plate in way of the chocks shall be sufficiently greater in size
than the chock to prevent interference from the unfinished area with the chock during installation.
4.1.1.5 Spotface hole edge radius shall be such that there will not be any interference between it and the bolt head-to-shank radius.
The spotface area shall be sufficiently greater in area than that of the bolt head or nut so as not to cause any interference when
tightening or with the tooling used. The spotface surfaces shall be perpendicular to the finished fitted hole centerline.
4.1.2 Installation:
4.1.2.1 The ship must be waterborne and fairly well completed before final alignment is accomplished. Ship shall be trimmed as
close to the even keel position as practicable. The same trim position shall be maintained throughout the alignment procedure. No
heavyweight shall be moved, loaded, or unloaded during alignment; ramps for Ro-Ros shall not be lowered or hoisted.
4.1.2.2 Final machining of the fitted or bearing areas of the machinery bedplate to chock to foundation plate and the mating areas
of the fitted portion of the bolt/stud shank and to the hole wall shall be a minimum of 85 % uniformly distributed around the mating
area. A light coat of Prussian blue shall be used to check the contact areas.
4.1.2.3 Machinery shall be aligned using a sufficient number of jackscrews, shims, and wedges to accommodate adequate
up-down, port-starboard, and fore-aft movement without distorting the machinery bedplate or foundation plate and, once aligned,
be able to hold that alignment firmly during the final chock installation and bolt-fitting phase.
4.1.2.4 A sufficient number of fitted bolts and chocks shall be installed to maintain the alignment and prevent any relative
movement between the machinery and the foundation as a result of vibration and sea state inputs. Number and position of fitted
bolts shall comply with the engine manufacturer’s requirements, if any.
Available from American Welding Society (AWS), 8669 NW 36 St., #130, Miami, FL 33166-6672, http://www.aws.org.
F1309 − 23
4.1.2.5 Bolts shall be installed from the bottom up unless surrounding interferences dictate otherwise.
4.1.2.6 The length of the fitted portion of the bolt/stub shank shall be 95 % of the combined thickness between spotfaces of the
machinery bedplate, chock, and foundation plate.
4.1.2.7 Final reaming of the fitted bolt holes or machining of the bolt shank shall occur after final alignment.
4.1.2.8 Final torquing of each bolt/nut/stub assembly shall be of sufficient torque to preload the nonfitted portions of the
bolt/nut/stub enough to prevent loosening as a result of vibrations, operations, hull, and sea state inputs.
4.1.2.9 Welding shall be performed in accordance with American Bureau of Shipping or the American Welding Society, Structural
Code AWS D
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...