Greensboro-based Tencarva Machinery Co., a distributor of pumps, pumping systems, fluid handling systems and other products for the industrial and municipal markets, announced Wednesday that it has begun construction on an approximately 23, 000 square foot office-service center in Nashville that is slated for completion around March 1, 2015. The company said 9, 000 square feet will be utilized for office and training in the building, with 14, 000 square feet used for warehouse and service.