B20−Exterior Vertical Enclosures

Category Archives: B20−Exterior Vertical Enclosures

Designing Masonry Buildings to the 2012 Energy Code

All images courtesy Mortar Net Solutions

The 2012 International Energy Conservation Code (IECC) will bring tremendous change to the way buildings are designed, constructed, and renovated. For example, the insulation requirements for masonry construction have been written to higher performance levels. The prescriptive energy code for the masonry industry is based primarily on the requirement for continuous insulation (ci) within the wall envelope. This becomes an issue when one looks at the standard concrete masonry unit.

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Specifying Stone Design: New technologies increase opportunities

Photos © Steve Maylone

This article looks at stone design, highlighting case studies that demonstrate success with sandblast projects. It also examines new technologies that have improved detailing for stone manufacturers. Finally, the piece explores sustainably green aspects of natural stone and how its use must include an assessment of the building material in terms of its complete environmental impact, from quarrying and fabrication to transporting and installation.

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Overlooked Considerations for Windows and Curtain Walls

Photo © BigStockPhoto/Zhiwei Zhang

The primary factors most designers consider when selecting window and curtain wall systems for their projects tend to involve cost, appearance, and energy efficiency. However, other considerations—such as weatherproofing, performance, and durability—can also be critical. Understanding material options, along with aspects like performance data and perimeter detailing are crucial.

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Selecting Joint Reinforcement

Photo courtesy Neumann/Smith Architecture

In a time of increasing complex walls, the masonry industry is striving to rediscover the simplistic principles that made it the material choice of the greatest civilizations in history. The principle “less is more” holds true when it comes to selecting wire reinforcement for reinforced masonry wall systems. Standard 9 gauge ladder shape wire fabricated with butt-welded cross-rods spaced 16 inches on center better facilitates code required rebar centering, grout flow and consolidation, and shrinkage control.

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Testing Glazing in the Field: Performance Classes

Up until the 2008 edition of American Architectural Manufacturers Association/Window and Door Manufacturers Association/Canadian Standards Association (AAMA/WDMA/CSA) 101/I.S.2/A440, North American Fenestration Standard/Specification for Windows, Doors, and Skylights (NAFS), there were five performances classes of windows with differing requirements for test pressures, allowed leakage rates, and other variables. This sidebar discusses the current four types, and their minimum performance grades.

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Testing Glazing in the Field: Specifying procedures now avoids trouble later

Photo © Bruce Damonte. Photo courtesy Wausau

Laboratory testing of fenestration products to the North American Fenestration Standard/Specification for Windows, Doors, and Skylights (NAFS) verifies the performance of a specimen of the fenestration product itself. How can one be certain the specified performance will be realized after installation? When properly applied, field testing can be a useful way to verify actual installed performance during construction and prior to occupancy of a building. The key is testing in conditions that accurately simulate the real-world environment and ensuring that the appropriate test method is applied to the specific installation.

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