Technological developments have revolutionized quarrying and fabrication methods, reducing costs and leading to new applications. Attractive new finishes, new construction techniques and new jointing methods have been introduced. For example, granite is being employed on steel frames to provide preformed wall units which require no additional masonry back-up.
In keeping with architectural progress and changing demands, The National Building Granite Quarries Association (NBGQA) has revised the recommended specifications for granite as follows. It is common practice in the industry to classify architectural granite as either of two types:
- Building granite: granite used either structurally or as a veneer for exterior or interior wall facings, steps, paving, copings or other building features.
- Masonry granite: granite used in larger blocks for retaining walls, bridge piers, abutments, arch stones and similar purposes.
- Inquiries regarding any proposed use of granite, whether conventional or innovative, are invited by membership companies of the association.