Industry Organizations Come Together at ICC Committee Action Hearings

The International Code Council (ICC) Committee Action Hearings took place in May in Albuquerque, N.M., drawing a number of collaborations by industry organizations over glass-related proposals.

The American Architectural Manufacturers Association (AAMA) joined forces with the Window and Door Manufacturers Association (WDMA), the Glazing Industry Code Committee (GICC) and the Aluminum Extruders Council (AEC) to ensure that the organizations were synchronized in their support, increasing the chances of their proposals being approved.

“In all, we took a position supporting or opposing about 70 to 80 proposals,” says Jeff Inks, WDMA’s senior vice president of advocacy.

Jointly drafted proposals centering on energy-related requirements aim to—for the first time ever—bring consistency to International Residential Code (IRC), International Building Code (IBC), International Existing Building Code (IEBC) and International Energy Conservation Code (IECC) requirements.

“As an industry, we showed a very strong, unified front, which is one of the reasons we were so successful,” Inks said. “That was noticeable.”

AAMA PROPOSALS

AAMA submitted eight proposals of its own, submitted eight joint proposals put forth by AAMA and other organizations, supported 14 other proposals and opposed 26 proposals.

AAMA codes and regulatory affairs manager Kathy Krafka Harkema says AAMA had a “great track record” in its favor at the hearings.

Approved was a residential proposal by AAMA for RB83-19 Section R308.6 clarifying that screens are not required below skylights and sloped glazing when laminated glass is used. However, the committee did not approve the structural proposal for S190-19-IBC Section 2405.1, 2405.3 clarifying that screens are not required below skylights and sloped glazing when 30-mm laminated glass is used. A majority of committee members felt the existing code language was clearer than the proposed revision.

Another approved proposal recognized AAMA 2502-19, which revises an exception to S108-19 IBC Section 1709.5 to permit engineering analysis of alternate sizes per AAMA 2502 with physical testing of a baseline unit (not each alternate size). This expands the ability to use comparative analysis of assemblies larger and smaller than the size originally tested.

The committee also approved a revision to CE39-19 IECC – C that defines the words “visible transmittance” and “annual,” as well as adds language to include tubular daylighting devices. The proposal also requires these devices to meet NFRC 203 and adds the standard into the reference standards chapter.

A revision to CE91-19-IECC – C Sections C402.4.1.2 and C402.4.2 adding an exception to the maximum skylight area limitations of the IECC in commercial buildings when required to comply with the minimum top lighting provisions was approved unanimously.

A joint WDMA/AAMA proposal to revise RE41-19-IECC was also approved, adding a new exception under both Table R402.1.2 and Table R402.1.4 that allows for maximum U-factor of 0.32 in climate zone marine 4 or climate zones 5-8 that will apply to vertical fenestration products installed in buildings either located:
• Above 4,000 feet or
• In windborne debris regions where protection of openings is required under IRC Section R301.2.1.2.

AAMA also supported a proposal that eliminates the ¾-inch maximum deflection requirement on a single lite of glass and allows instead for a less restrictive L/175 limitation in S189-19. It was approved by the committee.

A YEAR OF COLLABORATION

The GICC, AEC, WDMA and AAMA came together over what association officials see as inconsistencies in thermal requirements found in American Society of Heating, Refrigerating and Air-Conditioning Engineers’ (ASHRAE) standards and the IECC. Supported and approved amid the hearings, proposal CE-84-19 urges code officials to make 2021 IECC requirements consistent with those approved for the 2019 edition of ASHRAE’s 90.1 Standard (which serves as an alternative path to meeting IECC technical requirements).

“The fenestration requirements among the two have always been different,” Inks explains. “Now, for the very first time, they will be wholly the same. That’s important for the industry, so you don’t have two different requirements for the same climate zone.”

A final phase of hearings is scheduled for October 23-30, 2019 in Las Vegas, after which voting code officials will make their final determinations. The unofficial results of the hearing will be available in early December.

AAMA Releases New Document, Updates Standard

The American Architectural Manufacturers Association (AAMA) has released a new technical information report providing design considerations for exterior shading devices such as aluminum sun shades, glass awnings, deep snap on covers and louvered shading devices with outriggers. AAMA also released an updated specification establishing minimum performance requirements for liquid-applied flashing used to provide water-resistive seals around exterior wall openings in buildings that include fenestration products, such as doors and windows, as well as other through-wall penetrations.

SHADING DEVICES

AAMA TIR-A16-19, Design of Exterior Shading Devices, was developed to offer design considerations for manufacturers, architects and other members of the design team, as well as present important information for those responsible for facilities maintenance.

“Exterior shading devices are often incorporated into the façade of commercial and institutional buildings to reduce solar heat gain and to add elements of visual interest,” says Steve Fronek with Apogee Enterprises, chair of the AAMA APG Shading Device Task Group. “This technical information report presents design considerations for manufacturers, architects and other members of the design team, as well as
information for those responsible for facilities maintenance.”

This document should be used in conjunction with AAMA 514-16, Standard Test Method for Static Loading and Impact on Exterior Shading Devices, in preparation of architectural drawings and specifications, shop drawings and structural calculations, and maintenance programs, to avoid some of the technical and practical issues that can arise from improper design or application of shading devices.

Items in the scope of this document include, but are not limited to, impact loading on exterior shading devices, combined loading, new construction/renovation, window washing considerations, thermal bridging, glazing and more. Items not within its scope include interior light shelves, window wells and other considerations.

FLASHING

AAMA 714-19, Voluntary Specification for Liquid Applied Flashing Used to Create a Water-Resistive Seal around Exterior Wall Openings in Buildings, was last updated in 2015.

“Liquid-applied flashing products are seeing increasing application for sealing building interfaces, including flashing around windows and doors,” says Jim Katsaros with DuPont Building Performance Solutions, chair of the AAMA Flashing Committee. “These products offer many performance advantages, including outstanding adhesion to a wide variety of substrates, ultimate conformability for complex geometries and, in many cases, vapor permeable water-resistant seals.”

The AAMA 714 document sets forth minimum performance and durability requirements for these materials, helping to ensure proper function in end use. When making use of liquid applied flashing during the installation of products, both the International Residential Code and the International Building Code reference AAMA 714.

This specification sets forth minimum performance levels, which enable the specifier to evaluate and select the liquid-applied flashing. Three levels of heat exposure classification are established in this specification.

All AAMA documents may be purchased from AAMA’s
online store.

New Glass Informational Bulletins Available

Three new or updated resources for the glazing and glass products industry are available from the National Glass Association. Task groups within the organization’s Fabricating Committee created one new and updated two existing Glass Informational Bulletins (GIB).

The updated GIBs are Recommended Applications for Heat-Treated Glass (FB45-14 (2019)) and Approximate Weight of Interlayer Used in Laminated Architectural Flat Glass (FB23-09 (2019)).

“These GIBs were developed five and ten years ago at the initiative of member volunteers. They are excellent entry-level resources that provide foundational knowledge on two important elements in the fabrication process,” says Urmilla Sowell, advocacy and technical director.

Thermal Stress in Heat-Treated Spandrel Glass is the newest addition. The GIB addresses the unique and unanticipated demands on spandrel glazing due to growing energy efficiency initiatives. Recently, attention has been drawn to incidents in which spandrel glass has experienced solar-induced thermal stress breakage. This document discusses the phenomenon of thermal stress build-up, the factors that contribute to it and potential mitigation options.

To view the laid-in version of this article in our digital edition, CLICK HERE.