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Joining Windows and Doors
Windows and doors must perform many functions at once. In addition to meeting energy efficiency standards and contributing to the aesthetics of a project, these fenestration products must also meet performance requirements for wind load, air leakage, water resistance, and forced entry. Architects and engineers are responsible for the specification of windows and doors and for the design of rough openings which meet structural load requirements. One important consideration is how two or more window or door units are joined together or mulled, using independent joining materials, before or during installation. Though it sounds simple, design professionals are often confused by joining systems and the role they play in performance.

1. Determine how performance of individual and joined fenestration products are evaluated
2. Describe the test standards and code requirements that are applicable to structural joining systems
3. Explain the difference between reinforced (high-performance) joins and unreinforced (standard) joins, and which materials are appropriate for each
4. Explain the difference between Design Pressure (DP) and Performance Grade (PG) Ratings
5. Enumerate the requirements for joining systems in coastal zones

Dec 1, 2022 01:00 PM in Central Time (US and Canada)

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Dan Grubish, AIA, CDT, LEED-AP
Licensed Architect @Andersen Windows
Dan spent the first part of his career in architecture performing the following roles: drafter, job captain, project lead, and construction observation. Dan now consults Andersen staff and customers on products, joining, performance, specifications, installation, building codes, and green building.