The group's principal activity is to provide ready-mixed concrete and related products and services to construction companies. the group operates through 3 divisions: ready-mixed concrete, pre-cast concrete products and building materials. the group's operation consists of formulating, preparing, delivering and placing ready-mixed concrete at the job sites of its customers. the pre-cast concrete products consists of finished products, includes engineered structures, custom signage, manholes, catch basins, highway barriers and curb inlets. the building materials operations supply various materials, products and tools contractors use in the concrete construction industry. the group produces crushed stone aggregates from its granite quarry. ready-mixed concrete accounted for 86% of 2001 revenues; Pre-cast concrete products, 10% and building materials, 4%.