Huntington Memorial Hospital will construct two buildings and purchase capital equipment with a $50-million tax-exempt bond from the state-funded California Health Facilities Authority. The hospital will repay the money to the authority over a 30-year period. Under the plan, which was announced Monday by Dr. Allen Mathies Jr., the hospital's president and chief executive officer, a $33-million building will be constructed within four years to consolidate some existing medical facilities now in several buildings. Within two years an $8.5-million, four-story parking facility will be built to alleviate the parking shortage for visitors to the hospital at 100 Congress St. More than $2.3 million will be used to purchase capital equipment, and the rest of the money will be set aside for reserves. The hospital's board of directors also announced the appointment of Leonard Marangi, a Pasadena attorney, as chairman of the hospital's board. He succeeds Gleeson Payne, who resigned after serving 12 years as chairman.