CHAPTER II, SECTION 3 STATION: PURPOSE: 24 Ground Zero SITE: Yvonne USER: LASL CONSTRUCTION: 1-11-56 /4-24-56 This station was a 30’ x 34’ structural steel building with metal siding; it was high enough to accommodate a 5-ton bridge crane with a hook height of 21 feet. The roof and sides were covered with bituminus-coated corrugated aluminum. An opening in the east wall contained a steel plate baffle for supporting 38 steel pipes used in connection with Program 15 tests. One large roll-up door on the west side permitted entry of heavy equipment. Thefinished floorelevation was plus 9 feet. Under the scientific working point and embedded in the concrete floor were two rails for guiding a movable dolly used in handling equipment. The south and west walls were free of bracing in order to permit the installation of pipes. Steel ladders provided access to the roof for antenna maintenance. + * . hws Figure 2-39. Page 2-56 —_ . he The station was located approximately 500 feet offshore from Yvonne. To provide the proper location, a man-made island approximately 100’ x 125’ was constructed and then connected to the shore by a causeway having a minimum width of 24 feet. The bulkheads were of standard design. To minimize settlement of the station, the frame columns were supported on concrete piers which extended down to coral. To ensure a relatively fixed position of the dolly tracks, they were supported on a continuous concrete wall foundation extending down to coral. The ends of the walls were supported on 12-inch H-piles driven to a depth of 31 feet. A major problem was that of providing terminal supports for the Project 18 and Program 15 vacuum pipes (38 pipes) and supply- ing a pipe loop around the station for maintaining vacuum during the period of scientific equipment installation. The vacuum pipe system was designed to permit accurate supports with fixed clamps, which prevented movement. PNG AE: | 3S : Station 24, and Terminal Supports for Station 1524 Pipes