Northwest Masonry Institute
The Masonry SYSTEMS Guide, Northwest edition, is the Northwest masonry industry's primary information resource on masonry systems and the first to address the challenges of energy code requirements for continous installation. This website and the Masonry SYSTEMS Guide contains eight chapters outlining masonry systems, as well as a resources chapter for products appropriate for each system.
The Masonry SYSTEMS Guide and this website is produced with support from the Northwest Masonry Institute, and umbrella organization including the masontry industry, general contractor representatives, and national suppliers and organizations.
Pennsylvania Aggregates and Concrete Association
The Pennsylvania Aggregates and Concrete Association is the leading voice for the crushed stone, ready mixed concrete, sand and gravel, and cement industries' community.