The Conditions Glossary is a material-based glossary with a hierarchical structure that has been developed from other industry standard glossaries. It uses libraries of materials for brick, concrete and cast stone, glass, plaster, sheet metal, slate, stone, stucco, terra cotta, and wood. Within each material library there are classes of conditions, such as corrosion for metals, cracks for masonry materials, and infestation and damage for wood. Each general class of condition may have up to five or six sub-types. For example, surface, pitted, and perforated are used to describe corrosion of metal.

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