Oldcastle Manufactures and Distributes Architectural Building Products American Parent Company http://www.oldcastle.com/ Oldcastle Technical Resource Center http://www.oldcastledesignpro.com The American Institute of Architects http://www.aia.org/ American Society for Testing and Materials http://www.astm.org/ Construction Specifications Institute http://www.csinet.org/ The International Building Materials Group European Parent Company http://www.crh.com/ Masonry Advisory Council http://www.maconline.org/ Mason Contractors Association of America http://www.masoncontractors.org/ National Concrete Masonry Association http://www.ncma.org/ U. S. Green Building Council (USGBC) http://www.usgbc.org/