The Indiana Limestone Handbook, now in its 22nd edition, is generally recognized as the most respected book of its kind in the masonry industry. Dating back many years, the book combines the knowledge from the pioneers of the Indiana Limestone industry with that of today's generation and the intervening years. The publication is made possible in no small part by the efforts of the ILI technical committee, which is comprised of engineers, design specialists and other interested industry personnel. This committee evaluates technical inquiries regarding Indiana Limestone and conducts an ongoing review of the handbook and other ILI publications. ILI is pleased to offer the publication free of charge for downloading from our web site, and welcomes comments and questions about its content.