CHAPTER II, SECTION 3 The 300-foot vacuum pipes consisted of 4”, 8” and 12”-diameter thin wall steel pipe, supported and braced in Station 22 by a steel column, hangers at the front wall of Station 22, and 14 steel H-frame supports. Provisions were made in the support system to resist the lateral thrust of the vacuum pipes, to allow for longi- STATION: PURPOSE: SITE: USER: PARTICIPATION: CONSTRUCTION: and for horizontal and vertical adjustment of the pipes. The approximate size of the supports was 17’ high by 10’ wide. On the side of and about midway along the pipe lengths, a concrete base and wood shelter were provided for This station consisted of three 8”-diameter pipes forming a vacuum pipe array which extended from the cab of 300-foot tower Station 3 to a steel grate platform located at the 262.5foot level of the tower. A 2’ x 4’ x 4’-6” opening was made in the floor of the cab and angles tudinal movement by use of expansion bellows, two vacuum pumps. The mirror house for the 300-foot array was a plywood structure approximately 12’-8” x 14’-8” and 9-4” high at the front and sloping to 8’-4” at the rear wall. The front of the mir- ror house contained two 16’-diameter ports with a 16”-diameter 4-foot long sheet metal tube in each. A steel mirror support extended from the ground and through the floor which was braced with a cross beam at elevation plus 22.92 feet. The mirror house also contained two struct- ural supports for two 565-pound User-furnished lead pipes 18” in diameter and 24 feet long which were located directly behind the port holes in the face of the building. The second pipe array consisted of 8”-diameter pipes supported by seven steel H-frame supports. Provisions were also madefor the lateral thrust and for vertical and horizontal adjustment. An elevated wooden platform 10’-6” x 6’ and 9 high and a 4’ x 4’x 4’ concrete block were provided for vacuum pumps. The four mirror houses were of plywood construction with dimensions as follows: (A) 12’-4” x 5-6” x '7’-0”- high; (B) 5-0” x 4’ x 7’-0” high; (C) 5-0” x 4’-6” x 7-0” high; (D) 5-0” x 4’-6” x 7’-0” high. The front of each mirror house contained a 10’-diameter port in which a 10’-diameter 2’ long sheet-metal tube was located. Extending from the ground and through thefloor of each mirror house was an 8”-diameter steel mirror support topped with an 8” standardsteel flange. The required elevation at the top of the mirror support was 23.00 feet plus or mimus 4%”. The mirror supports were encased by 12”-diameter steel pipe which acted as a sun shield and thereby reduced expansion. The surfaces of all mirror houses facing Station 2300 were painted black. Power was supplied from Station 22. No timing signals were required. A total of 60 cubic yards of concrete was poured with an average 28-day strength of 3750 psi. Page 2-118 2311 Photo Pipe Array Ruby UCRL 3 2-27-56/5-28-56 were welded across the opening for securing the pipes at this level. Pipe supports were also provided at the 287.5 and 275-foot levels. The platform was prefabricated and designed to withstand a load of 60 psf. A pipe support was provided about 4 feet above the platform. The pipes were installed in approximate positions during May; the balance of the equipment was not in- stalled until late June because of prior events. A safety railing was installed on the platform with access provided from the elevator or foot ladder. The pipes and pumps were User-furnished and Contractor-installed. A clear line of sight was required from mirrors at the bottom ends of the pipe to Station 2301. Power requirements were 10 KW for instruments and 10 KW for utilities and were furnished from two panels located in the cab of tower Station 3. STATIONS: PURPOSE: SITE: 2320.01 thru 2320.10 Fluor Station Tare USER: UCRL PARTICIPATION: 22 CONSTRUCTION: 1-18-56/6-6-56 These stations were billboard-type structures 16’ long, 8’ high and mounted so that the intersections of their center lines were at. an elevation of 16 feet. The stations were wood framed, set on concrete foundations, and covered with plywood, the faces of which were covered with flat black paint. Receptacles were provided for connecting the User-furnished uors. STATION: PURPOSE: SITE: USER: PARTICIPATION: CONSTRUCTION: 2321 Plywood Fluor Billboard Ruby UCRL 8 4-20-56/5-16-56 This station consisted of 13’-wide structural steel platforms built on the elevator side of tower Station 3 and extending across one side of the