Tempering Division Meets
JANUARY 29--The view out the windows at the Laguna Cliffs Marriott Resort and
Spa was idyllic: children playing peacefully beneath a bright blue
sky, couples on a lazy Sunday afternoon walk along the coast, cyclists
pedaling surrounded by the panorama of the sun, sky and sail before
them. Yet, on this same afternoon, deep in the recesses of Marriott,
closeted a way in windowless room, sat a group of approximately
50 dedicated individuals toiling away. They came with one thing
in common: they were all temperers-temperers donating their Sunday
afternoon to the Glass Association of North America's Glass Tempering
Division (GTD) meeting. Despite the call of the gentle breeze outside,
division members met today as part of Glass Week 2006, being held
at the Laguna Cliffs Marriott Resort and Spa in Dana Point, California.
The afternoon began with a meeting of the Standards and Engineering
Committiee. An overview of the upcoming Engineering Standards Manual
was provided. GANA technical director Greg Carney led the group
through a chapter-by-chapter look at the upcoming manual.
This short meeting was followed by a much longer one: that of the
Construction Subcommittee, which spent the majority of its time
in an off-the-record discussion. The group also is putting the finishing
touches on the draft of its upcoming Glass Information Bulletin
(GIB) entitled Quench Patters in Heat-Treated Architectural. The
subcommittee expects the draft to be put out for comment shortly.
It also previewed the topics to be developed into a new Glass Information
Bulletin about today's high performance glasses that may require
heat-strengthening (a title has not yet been selected). The group
extended the deadline for review of its GIB about proper glass cleaning
until February 13th. Division members were urged to review the current
document and provide feedback about areas that need updating to
The meeting of the Optical Distortion Subcommittee, also known
as the successor to the Roller Wave Committee, began after a five-minute
break. This subcommittee currently is developing test methods to
measure observed deviation from flatness of heat-treated architectural
The subcommittee began by reviewing the work of yet another committee-the
American Society of Testing Material's (ASTM's) C14.11 Committee
on Optical Distortion. The next meeting of the ASTM group is on
Monday April 3 at ASTM headquarters and all interested GANA members
were cordially invited to attend. Joe Feingold of Strainoptic Inc.
was named the new chairperson of the subcommittee.
The Hole and Notch Specification Task Group (HNSTG) reported next
and began with its own subcommittee reports. Chairperson Bill Coddington
of W.S. Coddington Consulting LLC. asked the group the rhetorical
question about what the subcommittee should tackle next. "Should
we be working on the best practices for holes and notches in a variety
of applications?" he asked. "There are a lot of applications,
particularly in heavy glass and point-supported glass, that need
to be discussed. We need to make sure the trade knows that ASTM
C10.48 guidelines [here in the States] are not stringent enough
in a lot of applications. Many applications take tighter guidelines
and those are the types of things we are going to try and put together,"
A report on the Vehicle Subcommittee was then provided. It detailed
some changes in the requirements for glazing used in motor vehicles
and motor vehicle equipment. (Visit glassbytes.com today for more
Greg Carney provided a report on The Standards and Education Subcommittee
effort to educate those who are attempting to fabricate glass after
heat-treatment. Carney said a GIB is in the works on this issue.
"We know it's happening. Consultants are telling us its happening
and we need to get the word out that this could be a big problem,"
said Carney. "I am really concerned that down the road this
is going to give the industry a black eye if there are failures
that are caused by post-heat treatment fabrication," said Bob
Brown of Robert L. Brown and Associates, LLC.
The group also previewed the upcoming ISO standard for flat glass.
Currently available in draft form, the newly-proposed international
standard has some provisions radically different that what's been
included in the ASTM standards in the United States. It includes
new test criteria for the assessment of fragmentation that occurs
in the pendulum drop test. "It is unlike any tests used in
the United States in the past", according to GANA technical
director Greg Carney. The draft document also includes a chart for
maximum values for overall and roller wave that are much more stringent
than those currently used in the United States. Carney detailed
approximately 14 areas of concern with the proposed standard. "I
think it is critical that if these things move forward, and it does
become an international standard
it will be dramatically
different than our ASTM standard has been in the United States.
It will affect us quite a bit. We have got a lot of differences
and we must determine the best course of action," he said.
"We have to be careful that, if the design is coming from
England or France of Spain, then you need to produce to the European
Standard. The European designs have different stress levels and
tolerances than we are used to dealing with ... you have to keep
that in mind when you are fabricating glass for those systems,"
The afternoon ended with a division membership meeting. The division
added eight new members in 2005 and lost one due to consolidation.
Another member has already been added this year.
A new GIB is also in the works to address differences between ANSI
Z97.1 and the CPSC regulations. The bulletin is out for comment
now and expected to be released before the end of the year.
The Division also recognized two members for extraordinary service.
It recognized Rick Wright for his work on behalf of the division
during the past eight years. Wright then paid homage to Bill Murphy
of Tamglass, who has been in the industry for more thirty years
and is in the process of retiring. "A lot of manufacturers
know Bill as someone who is extremely helpful to all the manufacturers,"
said Wright. "Bill actually goes back to the Hordis Brothers
days. He has been involved in tempering, spare parts, training,
handling operations from Hordis Brothers to PGL to HGP to Tamglass.
He has helped a lot of people in this room."
Outgoing GTD chairperson Ren Bartoe was also honored for his service
to the committee, in a tribute that included some candid slides
of Bartoe in action.
The meeting ended at 4:30 p.m., just in time for the division members
to finally get to enjoy the view
of the sun setting over the
Photo caption: Outgoing tempering division chair Ren Bartoe
of Vesuvius USA (left) receives an award for his eight years of
service from Mike Ondrus of Atwood Mobile Products Inc.at the conclusion
of the division's meeting during Glass Week 2006. Photo courtesy
of Brian Pitman.