The future home of the Chatham County Health Department is starting to take shape. The brick-red exterior of the building is now standing after workers began lifting the prefabricated concrete walls into place in September. Inside, the metal wall framing remained exposed Tuesday as workers installed electrical components and insulation.County health administrator Randy McCall said construction of the $8.5 million facility is on schedule and expected to open by the end of May.On Tuesday, McCall toured the facility along with Luke Dorman, project manager for Rives E. Worrell, and County Manager Russ Abolt. The 37,000-square-foot building being built on Sallie Mood Drive will replace the department?s 57-year-old headquarters next door on Eisenhower Drive.The new facility will accommodate the same services offered in the current building such as adult and childhood immunizations, Tuberculosis testing, sexually transmitted disease treatment and family planning. The department?s environmental services, which includes restaurant inspections, will also be moved from rented space on Mall Boulevard. McCall said there were about 78,000 clinical visits last year at the current facility, which is difficult for patients to navigate.He said, ?People get lost in the maze.?