Structural     Construction and building > Concrete > Structural
	Curran Autoclaved Aerated Concrete Inc. - Designs and distributes a lightweight concrete floor and wall system. Site contains information about fire ratings, physical properties, and thermal performance.	Introduction
Chempruf Concrete - Produces a chemical resistant sulfur concrete for private or commercial use. Also capable of working throughout the U.S. and in some overseas areas.	Introduction
Simple Building Systems - Pre-cast and cast-on-site lightweight concrete and steel panels used for the construction of walls, floors and roofs on tilt-up and metal buildings.	Introduction
Sipcrete - Supplies an insulated, energy efficient, high thermal mass building system using concrete.	Introduction
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