ASTM D7655/D7655M-12(2022)

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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