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
Codes and Standards | Jan 3, 2020
Car-free streets could become common in major cities
New York and San Francisco establish thoroughfares dedicated to transit, pedestrians.
Codes and Standards | Jan 2, 2020
CRE professionals have increased interest in embodied carbon accounting, smart buildings
Survey also shows that interest in resiliency lags behind.
Codes and Standards | Jan 2, 2020
White paper focuses on Metal Composite Material labeling
Document part of effort to uphold industry standards for the product.
Codes and Standards | Dec 18, 2019
Hard Rock Hotel collapse in New Orleans puts spotlight on undocumented workers
Having helped rebuild the city after Hurricane Katrina, many under threat of deportation.
Codes and Standards | Dec 18, 2019
Maryland lawmakers take on blocked sidewalks during construction projects
Legislation clarifies developers’ responsibilities.
Codes and Standards | Dec 18, 2019
New York City passes legislation to prevent bird strikes on buildings
Requires bird-safe materials on first 75 feet of a structure.
Codes and Standards | Dec 16, 2019
New Buildings Institute seeks entries for Zero Buildings Database
Listing illustrates feasibility of ultra low-energy buildings.
Codes and Standards | Dec 13, 2019
USGBC launches new tool to prioritize sustainability strategies
Highlights building design features that can lead to better performance.
Codes and Standards | Dec 12, 2019
Coalition calls for consistent building data disclosure regulations in Canada
Major real estate firms are driving the effort.
Codes and Standards | Dec 10, 2019
Utilities rolling out more grid-interactive efficient building programs
Focus is on energy savings and demand flexibility.
