Defining and Refining Polished Concrete

Hiperfloor premium reflectiveHC550-0142

French-American architect Paul Philippe Cret once said, “Of the many doorways we pass in a short walk, most are fulfilling their purpose, most of them are well-enough built. [But] how many are worth a second look?” Cannot the same be said about architectural polished concrete? Are your floors meeting your design intent or did you settle? Do you know how to distinguish between the floor you asked for, and the floor being presented to you during the punch list?

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Sound Thoughts on Door and Frame Assemblies: Exploring differences between STC and STL ratings

All images courtesy MegaMet Industries

When sound control acoustic door assemblies are selected, the usual way is to specify a sound transmission coefficient (STC) rating in accordance with established standards. However, this is not as catch-all as it sounds, especially when the sounds that must be blocked come in different frequencies. This article works to clarify some misconceptions about STC, and explores sound transmission loss (STL), which is derived from actual lab testing at specific frequencies.

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Understanding New Accessibility Requirements for Doors

All images courtesy Allegion

The 2010 Americans with Disabilities Act (ADA) Standards for Accessible Design has several requirements that continue to surprise architects and specifiers. This article examines changes to door hardware operable force, use of low-energy automatic operators, protrusions into egress, and the need for proper maneuvering clearance.

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Specifying Doors for a Healthier Environment


Healthcare facilities contribute to patient well-being by balancing design elements in the built environment with safety and security. Proper selection of door and hardware products can help protect patients from harm and maintain a level of security for others, including professional and clinical staff. Doors, frames, locks, and electronic access control, can be used together to answer the challenges routinely found in behavioral health and crisis intervention centers. A well designed healthcare facility takes extra precautions to make sure doors and hardware provide security and protection without compromising safety.

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