June 3, 2019

Common Smoke Control Approaches in High-rise Buildings

By: Nathan Wittasek

Although the rationale for providing redundant automatic systems to manage smoke movement in tall buildings where manual fire suppression activities cannot be easily undertaken is clear, it is less clear why there is so much...

Keywords:Fire Engineering, Fire/Smoke, High Rise
May 28, 2019

Understanding Unitized Facade Systems and Mega Panel Applications

By: Peter Babaian, Christopher Grey
Prefabricated building enclosure systems can help project teams streamline construction schedules, reduce construction costs, and improve assembly quality.
Keywords:Preengineered/Prefabricated/Modular
May 20, 2019

Undercut and Grouted Anchors as Post-Installed Shear Reinforcement

By: Anthony Dondrea, Oguzhan Bayrak

Research and experience has shown that given specific loading scenarios and reinforcement configurations, reinforced concrete members may experience nonductile shear failures that can occur in sudden and brittle modes, often leading to structural...

Services:Structural Design
Keywords:Concrete-Reinforced
April 10, 2019

Development of a New-Generation High-Strength Post-Tensioned Anchor Bar

By: Jared Brewe, Neal Anderson

The new signature, steel arch bridge for I-74 over the Mississippi River is connected to the abutments by high-strength, post-tensioned anchorage bars. To achieve a design 100-yr service life for the anchorage bars in an exposed condition, a...

Keywords:Corrosion, Materials Testing for Design, Metal-Steel, Research/Development
March 26, 2019

Considerations for Custom Facade System Design

By: Scott Bondi, John Jackson
Designing custom glazing systems – such as structural glass walls or unitized curtain walls – is a complex task that varies widely from project to project, often depending on architectural goals and logistical constraints.
Services:Building Enclosure Design
Keywords:Curtain Wall, Glass and Glazing
March 26, 2019

Passive House Design for High-Performance Building Enclosures

By: Cheryl Saldanha, Gert Guldentops

The building enclosure is at the core of Passive House (PH) design – it is the “passive” system that regulates energy transfer. The mechanical and other “active” systems supplement the enclosure design to maintain...

Services:Building Enclosure Design
Keywords:Building Science
March 15, 2019

Thermal Enhancements for Aluminum-Framed Curtain Walls - A Practical Perspective and Some Nonthermal Considerations

By: Mary Arntzen, Derek McCowan

In the March issue Interface – The Journal of RCI, Mary Arntzen and Derek McCowan discuss various modifications that may be made to aluminum-framed curtain walls to improve their thermal performance. This article discusses enhancement...

Services:Building Enclosure Design
Keywords:Curtain Wall, Glass and Glazing, Thermal
March 15, 2019

Window Receptor Frames in 2018: More Than Just Accessories

By: John Karras, Megan Toumanios, Jin Rui Yap

In the March issue of the RCI Technical Journal, Interface, John Karras, Megan Toumanios, and Jin Rui Yap examine window receptor frames. The article takes a close look at the topic, including provisions in window industry standards and...

Services:Building Enclosure Design
Keywords:Windows
March 2, 2019

Facade Inspection and Maintenance

By: Peter Babaian
A well-designed, constructed, and maintained building facade protects the building interior from water leakage, air infiltration, and energy loss. However, environmental exposure and time can degrade facade components. Facade deterioration can lead to a range of issues from compromised performance to potential falling hazards.
Services:Building Enclosure Investigation
Keywords:Condition Assessment, Facade Inspection, Facade Ordinance, Ordinance
February 12, 2019

Welded Steel Moment Resisting Frames

By: Ronald Hamburger, James O. Malley

This is one of a series describing surprising lessons engineers have learned from earthquakes and, in particular, the January 17, 1994, Northridge earthquake. Engineers have been learning from earthquakes for more than 100 years by observing the...

Services:Structural Investigation
Keywords:Frame Moment, Metal-Steel, Seismic Engineering and Retrofit

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