The Fenestration and Glazing Industry Alliance (FGIA) updated a mulled assemblies document: AAMA 450-20, Performance Rating Method for Mulled Combination Assemblies, Composite Units, and Other Mulled Fenestration Systems.
The document was last updated in 2010. The performance rating method describes procedures and requirements for determining the air leakage, water resistance, and structural performance of mulled fenestration systems.
The document includes test procedures and calculation procedures for determining the performance of mulled fenestration systems. Mulled fenestration systems may be factory assembled or assembled onsite with parts and instructions supplied by the product manufacturer.
“The North American Fenestration Standard says that ‘mullion ratings shall be determined according to the requirements and procedures of AAMA 450 for both composite units and mulled combination assemblies.’ However, until now, AAMA 450 provided no guidance for composite units,” said Dave Goldsmith (PlyGem), co-chair of the FGIA Requirements for Mulled and Combination Window Assembly Update Task Group. “This document will put powerful new tools into the hands of engineers to assist them in determining how to construct structurally sound and weatherproof fenestration products in the most economical ways, and should also drastically reduce the amount of testing required to validate a large variety of composite unit configurations,” Goldsmith said.
Related Stories
| Jun 14, 2012
AGC, other business groups oppose hiring rules for disabled
Business groups have asked the U.S. Department of Labor to reconsider a proposed hiring quota aimed at federal contractors pertaining to people with disabilities.
| Jun 5, 2012
HP Labs aims for net-zero energy data centers
Building sustainable data centers is one of the goals of HP Labs, and it believes technology, combined with the right building techniques, could result in the construction of energy-efficient data centers.
| Jun 5, 2012
USGBC delays LEED 2012; renames it LEED v4
In response to concerns by LEED users, the U.S. Green Building Council (USGBC) announced that it will delay the ballot on LEED 2012 until June 1, 2013.
| Jun 5, 2012
Baltimore officials vow to block $1.8 billion urban renewal project
Baltimore officials want to block a $1.8 billion urban renewal project until more neighborhood residents and minority contractors are hired and displaced residents can benefit from the revitalization.
| Jun 5, 2012
OSHA launches campaign to warn of heat dangers in outdoor work
The Occupational Safety and Health Administration has begun a campaign to warn outdoor workers about the dangers of heat exposure.
| Jun 5, 2012
AGC’s Safety and Health Conference focuses on regulations, legislation
More than 150 industry professionals and other attendees will participate in the Associated General Contractors of America’s (AGC’s) safety and health conference July 11-13 in Washington, D.C.
| Jun 1, 2012
New BD+C University Course on Insulated Metal Panels available
By completing this course, you earn 1.0 HSW/SD AIA Learning Units.
| May 31, 2012
Proposed change in Michigan’s building code would hurt innovation, say critics
Legislation pending before the Michigan Senate would change the law that calls for building codes to be updated every three years to require an update only every six years.
