||Guidance for Geomembrane Installation Provided in New Standard
Banding straps, battens, boots, and rondels are some components
used to achieve a sound fit when attaching geomembranes to structures.
The type and use of each component, and key issues of design and
installation are described in D 6497, Standard Guide for Mechanical Attachments of Geomembrane to
Penetrations and Structures, new from ASTM Committee D35 on Geosynthetics.
This standard guide will benefit geomembrane installers, users,
and design engineers, explains Robert Mackey, P.E., senior design
engineer, S2L, Inc., Maitland, Fla., who chairs the ASTM Subcommittee
D35.04 on Geosynthetic Clay Liners. Geomembranes are used as
a liquid or vapor barrier and usually require attachment to pipe
penetrations or structures. Geomembrane attachments to penetrations
and structures can be a difficult operation that requires an extensive
knowledge of construction methods and nuances that may affect
the longevity of the geomembrane barrier. Geomembrane installers
and design engineers may not have the extensive knowledge required
for a particular attachment. This is particularly true for a first-time
design engineer or installer new to the waste containment field.
This standard guide incorporates the vast knowledge of experienced
installers, design engineers, manufacturers, and users, and details
specific concerns regarding mechanical attachments of geomembrane
to penetrations and structures, says Mackey, chairman of the
task group that developed D 6497. Its primary use will be as
a teaching aide to the user in hopes of improving the general
knowledge of the industry. It includes figures of attachment methods
for various pipes and structures. This guide is considered a living
standard that will require revisions to include new geomembrane
attachment methods with new geomembrane materials.
D 6497 provides guidance for geomembrane application(s); however,
users of the standard may find portions applicable to other geosynthetics.
For further technical information, contact Robert E. Mackey, P.E., S2L, Inc., 529 Versailles Dr., Suite 103, Maitland, FL 32751
(407/475-9163; fax: 407/475-9169). Committee D35 meets Jan. 22-25
in Reno, Nev. For meeting or membership details, contact manager Pat Picariello, ASTM (610/832-9720). //
Copyright 2000, ASTM