CHAPTER II, SECTION 5 CONSTRUCTION. Work was scheduled to commence on 1 July and to be completed on 31 December. Actual construction started on 1 July and was completed on 6 February 1954. Fizure 2-146 shows the massive diagonal re- inforeing steel required for corner bracing. Figure 2-147 likewise notes the massive vertical reinforcements required for the side walls. The progress was estimated as 416% completed as shown on 11 September. Figure 2-148 shows the divisions for the three rooms in the main structure with connecting corridor, tunnel and utility room. Progress of work was estimated as 65% completed as shown and on 7 October. STATION 2201 - RECORDING STATION SITE SALLY - USER: UCRL GENERAL. This Station, used for reaction history, was a one-story reinforced concrete addition to existing GREENHOUSE Station 132A and 8. The thickness of walls, roof and floor of Figure 2-147. 30-0" 1m plan, divided by a 34-foot long in- tenor w2:L into two instrument rooms of equal size. Each room was connected by a 4’-2" x 7*- 9" opening to a utility room 14’ - 0% x 26’ -0” in plan, w:th nine-foot ceiling height, extending across the ends of the existing pair of rooms. One end of th:~ room extended into a tunnel having a clear wiath and height of four feet and nine fect respectively. The entrance consisted of two openings, cach enclosed by a steel blast resistant door. A 5'-0" x 7’- 0" protected area outside the conening was completely housed by a small reinforced concrete box-like structure called the vestibule. The main entrance opened onto a re:niorced concrete loading platform about 16°- 0 x 20°- 0% in plan. Steps led down to a 20°- 0” wide by 68’ - 0” loading ramp. The pyption was covered with a 15-foot deep earth ill. CONSTRUCTION. Work was scheduled to commence on 1 July and to be completed by 15 January. Actual work started on 6 July and was compl-ted on 20 January 1954. Figure 2-149 noted method of securing a bond between the old structure and the new addition. The method A tam eee ENGINEERING. The design criteria were included and reported under Station 1200. this Station varied from 2’- 10” to 4’-6”". It consaic! of the existing Station, 347-0” x Station 2200 - 46° Completed ¢ Page 2-137 Toeres, see at gn Se ke ee eee. 1200 with the one exception being that the main rectangular structure was six feet shorter in length.