ASTM D7655/D7655M-12(2022)
(Classification)Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems
Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems
SIGNIFICANCE AND USE
4.1 The wind resistance of ballasted membrane roof systems is determined largely by the size and weight of the ballast used. ANSI/SPRI RP-4 provides a method for the wind design of ballasted single-ply membrane roof systems and includes specific guidelines for the size and weight of aggregate used as ballast. The aggregate size classifications provided in this standard are intended for use with the guidelines provided in ANSI/SPRI RP-4 in designing the wind resistance of aggregate ballasted single-ply membrane roof systems.
4.2 The aggregate size classifications provided in this classification are intended to provide a basis of compliance for contract documents that specify certain aggregate sizes for use on ballasted membrane systems.
SCOPE
1.1 This classification defines the aggregate size designations and ranges in mechanical analyses for standard sizes of aggregate used as ballast for membrane roof systems.
1.2 The text of this classification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.
1.3 With regard to sieve sizes and the size of aggregate as determined by the use of testing sieves, the values in inch-pound units are shown for the convenience of the user; however, the standard sieve designations shown in parentheses are the standard values as stated in Specification E11.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.5 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.
1.6 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
- 31-Oct-2022
- Technical Committee
- D08 - Roofing and Waterproofing
- Drafting Committee
- D08.20 - Roofing Membrane Systems
Relations
- Effective Date
- 01-May-2020
- Effective Date
- 01-Nov-2019
- Effective Date
- 15-Dec-2018
- Effective Date
- 15-Dec-2018
- Effective Date
- 01-Feb-2016
- Effective Date
- 15-Dec-2013
- Effective Date
- 01-Oct-2013
- Effective Date
- 01-Mar-2013
- Effective Date
- 01-Mar-2013
- Effective Date
- 01-Sep-2010
- Effective Date
- 01-Jul-2009
- Effective Date
- 01-May-2009
- Effective Date
- 01-Feb-2008
- Effective Date
- 01-Jan-2008
- Effective Date
- 01-Jun-2007
Overview
ASTM D7655/D7655M-12(2022), published by ASTM International, is the standard classification for the size of aggregate used as ballast in membrane roof systems. This standard defines size designations and ranges for aggregates commonly used in single-ply membrane roof applications, providing clarity for contract documents and aiding compliance during roofing system design and installation.
Ballasted membrane roof systems rely on the correct size and weight of aggregate to ensure optimal wind resistance. By standardizing aggregate size classifications, ASTM D7655 helps architects, roofing professionals, and contractors design, select, and install safer and more reliable roof systems.
Key Topics
- Aggregate Size Classification: The standard details the size designations and mechanical particle size ranges for aggregates intended as ballast for roofing membranes.
- Testing & Compliance: Guidance is given on sampling (referencing ASTM D75/D75M), and sieve analysis procedures (referencing ASTM C136/C136M and E11) to ensure proper grading and quality.
- Contract Specification: Aggregate size classifications set forth in this standard can be used directly in contract documents to specify required aggregate types for ballasted membrane roof systems.
- Dual Units: Aggregate sizes are provided in both SI and inch-pound units. Each unit system is to be used independently to avoid compliance issues.
- Wind Resistance: Emphasizes the role of aggregate size and weight in achieving wind design requirements, particularly referencing sizing guidelines in ANSI/SPRI RP-4.
Applications
ASTM D7655/D7655M is widely used in the following scenarios:
- Roofing Design: Roofing designers and consultants use this standard to select the appropriate aggregate size classifications that meet desired wind uplift requirements for ballasted single-ply membrane systems.
- Construction Specifications: Contract documents and project specifications often cite ASTM D7655 aggregate size classes to ensure uniformity and compliance across projects.
- Quality Assurance: Roofing contractors and inspectors use this standard to verify aggregate materials on-site align with the specified size class before installation.
- Wind Design Compliance: The standard provides foundational data for compliance with ANSI/SPRI RP-4, ensuring roofs are designed to withstand local wind loads.
Related Standards
When working with aggregate ballast and membrane roofing, several related standards play a key role:
- ASTM C136/C136M – Test Method for Sieve Analysis of Fine and Coarse Aggregates
- ASTM D75/D75M – Practice for Sampling Aggregates
- ASTM E11 – Specification for Woven Wire Test Sieve Cloth and Test Sieves
- ASTM D1079 – Terminology Relating to Roofing and Waterproofing
- ANSI/SPRI RP-4 – Wind Design Standard for Ballasted Single-Ply Roofing Systems
Together, these standards create a robust framework for ensuring aggregate ballast meets the size, uniformity, and performance requirements critical for durable, wind-resistant membrane roof installations.
Keywords: ASTM D7655, aggregate ballast, membrane roof systems, aggregate size classification, wind resistance, roofing standards, ballasted roofing, roofing aggregate sizes, ASTM roofing, roof ballast testing.
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Frequently Asked Questions
ASTM D7655/D7655M-12(2022) is a standard published by ASTM International. Its full title is "Standard Classification for Size of Aggregate Used as Ballast for Membrane Roof Systems". This standard covers: SIGNIFICANCE AND USE 4.1 The wind resistance of ballasted membrane roof systems is determined largely by the size and weight of the ballast used. ANSI/SPRI RP-4 provides a method for the wind design of ballasted single-ply membrane roof systems and includes specific guidelines for the size and weight of aggregate used as ballast. The aggregate size classifications provided in this standard are intended for use with the guidelines provided in ANSI/SPRI RP-4 in designing the wind resistance of aggregate ballasted single-ply membrane roof systems. 4.2 The aggregate size classifications provided in this classification are intended to provide a basis of compliance for contract documents that specify certain aggregate sizes for use on ballasted membrane systems. SCOPE 1.1 This classification defines the aggregate size designations and ranges in mechanical analyses for standard sizes of aggregate used as ballast for membrane roof systems. 1.2 The text of this classification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.3 With regard to sieve sizes and the size of aggregate as determined by the use of testing sieves, the values in inch-pound units are shown for the convenience of the user; however, the standard sieve designations shown in parentheses are the standard values as stated in Specification E11. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 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. 1.6 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 4.1 The wind resistance of ballasted membrane roof systems is determined largely by the size and weight of the ballast used. ANSI/SPRI RP-4 provides a method for the wind design of ballasted single-ply membrane roof systems and includes specific guidelines for the size and weight of aggregate used as ballast. The aggregate size classifications provided in this standard are intended for use with the guidelines provided in ANSI/SPRI RP-4 in designing the wind resistance of aggregate ballasted single-ply membrane roof systems. 4.2 The aggregate size classifications provided in this classification are intended to provide a basis of compliance for contract documents that specify certain aggregate sizes for use on ballasted membrane systems. SCOPE 1.1 This classification defines the aggregate size designations and ranges in mechanical analyses for standard sizes of aggregate used as ballast for membrane roof systems. 1.2 The text of this classification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard. 1.3 With regard to sieve sizes and the size of aggregate as determined by the use of testing sieves, the values in inch-pound units are shown for the convenience of the user; however, the standard sieve designations shown in parentheses are the standard values as stated in Specification E11. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.5 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. 1.6 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 D7655/D7655M-12(2022) is classified under the following ICS (International Classification for Standards) categories: 91.060.20 - Roofs. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D7655/D7655M-12(2022) has the following relationships with other standards: It is inter standard links to ASTM D1079-20, ASTM D75/D75M-19, ASTM D1079-18e1, ASTM D1079-18, ASTM D1079-16, ASTM D75/D75M-13, ASTM E11-13, ASTM D1079-13e1, ASTM D1079-13, ASTM D1079-10, ASTM D1079-09, ASTM E11-09e1, ASTM D1079-08a, ASTM D1079-08, ASTM D1079-07a. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D7655/D7655M-12(2022) 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:D7655/D7655M −12 (Reapproved 2022)
Standard Classification for
Size of Aggregate Used as Ballast for Membrane Roof
Systems
This standard is issued under the fixed designation D7655/D7655M; 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 2. Referenced Documents
1.1 This classification defines the aggregate size designa-
2.1 ASTM Standards:
tions and ranges in mechanical analyses for standard sizes of C136/C136M Test Method for Sieve Analysis of Fine and
aggregate used as ballast for membrane roof systems. Coarse Aggregates
D75/D75M Practice for Sampling Aggregates
1.2 The text of this classification references notes and
D1079 Terminology Relating to Roofing and Waterproofing
footnotes which provide explanatory material. These notes and
E11 Specification for Woven Wire Test Sieve Cloth and Test
footnotes (excluding those in tables and figures) shall not be
Sieves
considered as requirements of the standard.
2.2 ANSI/SPRI Standard:
1.3 With regard to sieve sizes and the size of aggregate as
RP-4 Wind Design Standard for Ballasted Single-Ply Roof-
determined by the use of testing sieves, the values in inch-
ing Systems
pound units are shown for the convenience of the user;
however, the standard sieve designations shown in parentheses
3. Terminology
are the standard values as stated in Specification E11.
3.1 Definitions—For definitions of terms used in this
1.4 The values stated in either SI units or inch-pound units
classification, refer to Terminology D1079.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
4. Significance and Use
system shall be used independently of the other. Combining
values from the two systems may result in nonconformance 4.1 Thewindresistanceofballastedmembraneroofsystems
with the standard. is determined largely by the size and weight of the ballast used.
ANSI/SPRI RP-4 provides a method for the wind design of
1.5 This standard does not purport to address all of the
ballasted single-ply membrane roof systems and includes
safety concerns, if any, associated with its use. It is the
specific guidelines for the size and weight of aggregate used as
responsibility of the user of this standard to establish appro-
ballast. The aggregate size classifications provided in this
priate safety, health, and environmental practices and deter-
standard are intended for use with the guidelines provided in
mine the applicability of regulatory limitations prior to use.
ANSI/SPRI RP-4 in designing the wind resistance of aggregate
1.6 This international standard was developed in accor-
ballasted single-ply membrane roof systems.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 4.2 The aggregate size classifications provided in this clas-
Development of International Standards, Guides and Recom- sification are intended to provide a basis of compliance for
mendations issued by the World Trade Organization Technical
contract documents that specify certain aggregate sizes for use
Barriers to Trade (TBT) Committee. on ballasted membrane systems.
1 2
This classification is under the jurisdiction of ASTM Committee D08 on For referenced ASTM standa
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