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
| Oct 20, 2011
Process leads to new design values for southern pine and other visually graded dimension lumber
A summary of the process used to develop new design values will clarify many of the questions received by the SFPA.
| Oct 19, 2011
Another drop for Architecture Billings Index
Positive conditions seen last month were more of an aberration.
| Oct 18, 2011
Dow Building Solutions invests in two research facilities to deliver data to building and construction industry
State-of-the-art monitoring system allows researchers to collect, analyze and process the performance of wall systems.
| Oct 14, 2011
ACI partners with CRSI to launch new adhesive anchor certification program
Adhesive anchor installer certification required in new ACI 318-11.
| Oct 13, 2011
New Building Materials Label Focuses On Sustainability
Architectural products company Construction Specialities and design firm Perkins + Will have created a label for building materials to shed light on product content.
| Oct 13, 2011
New Law: California Building Standards Commission Must Include Green Expert
A new California law, AB 930, requires that one member of the California Building Standards Commission be “experienced and knowledgeable in sustainable building, design, construction, and operation.”
| Oct 13, 2011
AGC Urges Repeal of 3% Withholding On Government Contracts
The U.S. House of Representatives is planning a vote in October on a bill to repeal the 3% withholding requirement on all federal and state contracts for goods and services.
| Oct 13, 2011
House Bill Would Block New OSHA Regulations
Proposed riders in a U.S. House of Representatives spending bill would block the Occupational Safety and Health Administration (OSHA) from issuing controversial workplace safety and health regulations.
| Oct 11, 2011
AIA introduces five new documents for use on sustainable projects
These new documents will be available in the first quarter of 2012 as part of the new AIA Contract Documents service and AIA Documents on Demand.
| Oct 7, 2011
GREENBUILD 2011: UL Environment releases industry-wide sustainability requirements for doors
ASSA ABLOY Trio-E door is the first to be certified to these sustainability requirements.
