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
| Nov 23, 2011
Fenestration council seeks committee members
The National Fenestration Rating Council (NFRC) is seeking members for a committee to pursue recognition of its ratings procedures from the American National Standard Institute (ANSI).
| Nov 23, 2011
Obama signs repeal of 3% withholding on government contracts
President Obama signed a bill that repeals a law requiring governments to withhold 3% of payments over $10,000 to contractors.
| Nov 23, 2011
USGBC launches app lab for LEED certification process
The U.S. Green Building Council has released the App Lab, a searchable catalog of third-party apps that are integrated with LEED data.
| Nov 23, 2011
Document gives advice on stormwater runoff management
The report, “Rooftops to Rivers II,” provides tips on how cities can use smart infrastructure and green building design to minimize pollution from stormwater runoff and other wastewaters.
| Nov 23, 2011
Zoning changes proposed to make New York City buildings greener
New York City will introduce new zoning proposals next month that would make it easier for building owners to add features that will make their properties more sustainable.
| Nov 18, 2011
AGC offers webinar on Davis-Bacon compliance
Webinar to be held in two sessions, Dec. 7 and 8 from 2:00-3:30 p.m. EST.
| Nov 18, 2011
New green construction code may help push LEED standards higher
The International Green Construction Code (IgCC) is expected to set a floor for building standards and may create the opportunity for LEED certifications to push toward higher ceilings.
| Nov 18, 2011
New OSHA fall safety rule could save contractors money on insurance premiums
The new Occupational Safety and Health Administration rule requiring employers operating in the residential construction industry to use the same methods of fall protection that historically have been used in the commercial construction industry could save them money.
| Nov 18, 2011
Some believe new Austin building code will help mom and pop shops
Austin, Texas has proposed building codes that require wider sidewalks and call for buildings to be closer to sidewalks along a 3.5-mile stretch of highway.
| Nov 11, 2011
AIA: Engineered Brick + Masonry for Commercial Buildings
Earn 1.0 AIA/CES learning units by studying this article and successfully completing the online exam.
