August 2004

What will happen to aggregate? | Tech Today

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What will happen to aggregate?

by Mark S. Graham
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Recently, model building codes have enacted restrictions regarding the use of aggregate as a top surfacing for low-slope membrane roof assemblies. Such restrictions may affect the installation of low-slope membrane roof assemblies.

Following is the rationale for these restrictions and a review of the specific restrictions.

Wind-borne debris

Since the early 1990s, model building codes have taken strides to strengthen buildings' resistances to high-wind pressures, such as those experienced during hurricanes. At the same time, insurance industry representatives and some wind experts also have lobbied for code restrictions intended to limit wind-borne debris...

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