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Updates

Dodge Momentum Index Drops 6.5% in August

The Dodge Momentum Index, issued by Dodge Construction Network, declined 6.5% in August to 178.0 (2000=100) from the revised July reading of 190.3. Over the month, the commercial component of the DMI fell 1.6%, while...

EIFS in NYC

New York City is set to initiate a major code change that will affect the design and installation of certain types of exterior wall assemblies.

Acoustics in Suspended Acoustical Ceilings

In acoustical wall design the main consideration is how much sound energy will pass through the wall itself. The wall assembly will be tested at specific sound frequencies where a unique single number will...

Horizontal Membrane Protection

Membrane protection in the context of fire resistance indicates a component in either a fire-resistive assembly or a specialized system providing the fire resistance. This definition is a prime example of how advances in...

What Is Delegated Design?

The concept of delegated design has been around for many years. Recent conversations in professional circles center on its increased usage. However, there is a certain confusion that is often related to the process....

Gypsum Board Fire Ratings

Please explain the different types of gypsum wallboard as related to fire rating. First it must be noted that gypsum board, as a single product or building material, has no fire-resistive rating in...