Concrete outperforms wood as a construction material, and won't burden building owners with constant repair and maintenance costs. Versatile, long-lasting and durable, concrete is a cost-effective, sustainable choice for both residential and commercial buildings. When it's built with concrete, it's built to last. Concrete is a building material that gains strength over time. Concrete's 100-year service life conserves resources by reducing the need for reconstruction. Concrete is durable - it resists weathering, erosion and natural disasters, needs few repairs and little maintenance, adding up to a solid investment.
Frontier refers to a contrasting region at the edge of a European-American line of settlement. American historians cover multiple frontiers but the folklore is focused primarily on the 19th century west of the Mississippi River.
The boundary of an area of land is an imaginary line that separates it from other areas. ...the Bow Brook which forms the western boundary of the wood. Drug traffickers operate across national boundaries. The boundaries of something such as a subject or activity are the limits that people think that it has. The boundaries between history and storytelling are always being blurred and muddled. ...extending the boundaries of press freedom. Synonyms: limits, bounds, confines, threshold More Synonyms of boundary.