CHAPTER Il, SECTION 4 there was an 11’-0” x 34’-0” reinforced concrete bed frame two feet thick and flush with the top of the floor slab. In t 2 bed frame there were many anchor bolts embedded which tied down three longitudinal User-furnished track assemies. mensions and added a catwalk supported from the floor. On 4 June 1953 criteria for the anchorbolt plan of the bed frame were received. On 5 June 1953, criteria deleted the catwalk and revised the bedframe anchor bolt plan. The anchor bolt plan was revised again on 29 June The electrical service for this building was located underground from the transformer bank located in the cab compound. The service was 400 ampere, 120 208 volt, 3 phase, 4 wire to a full-standing switchboard located in the Elect- Nine drawings and five sketches were prepared. Design work proper started on 29 April 1953. The drawings were submitted on 20 May and were approved on 26 May. Three one-half H. P. roof ventilators were installed in this structure, providing one complete air char:ze every five minutes. Banks of filters were. provided in the north and south wall air intakes to minimize dust conditions. Original criteria were received on 29 January 1953, calling for roof ventilators providing approximately 30 air changes per hour and an explosion-proof crane of approximately 15ton capacity. Criteria reccived on 1 May 1953 deleted the explosion-proof requirement from the roof ventilators provided motors were located outside of the air stream. The Useralso decided to furnish the explosion-proof crane. Criteria received on 12 May 1953, disclosed that the User had an air compressor which they would pipe to the air-operated crane. General criteria were received 29 January 1953, which requested a schematic layout for a building 33’-0” x 100’-0”. Additional criteria were received 29 Anril 1952) which cunerseded previous criteria and which requested two 60’-0" x 40’-0” x 53’-0” high buildings, separated by means of a breezeway, and two sheds, one at the side of each building. The crane and crane rails were to be furnished by the User. Criteria of 1 May 1953 deleted one of the two buildings and the breezeway. On 11 May 1953 the shed ard door from the main buildings were deleted. Another shed was added and one of the sliding doors of the main building was increased in size. Also, rails and structural tees were added ta the bed frame. Criteria of 14 May 1953 relocated the shed, revised di- GENERAL. The shore erosion on the lagoon side at site Fred, which resulted from wave action and storms from the southwest, was under close observation beginning early in 1952. By the fall of 1953, this crosion had become critical and the Field Engineering Division was requested to make recommendations, with various alternative methods, in order to provide adequate protection to the buildings and facilities. After taking all factors into consideration, tt was decided from an economical, maintenance and protective standpoint to construct a reinforced concrete wal! along the reef sections of critical erosion. The final design of the Seawall consisted of a reinforced concrete retaining wall that averaged approximately four feet in height and was keyed into a concrete footing. The footing was keyed into the coral reef by doweling. The Seawall was divided into eight separate sections totaling approximately 5200 feet, the longest of which was 1550 feet and the shortest 150 feet. These eight sections were give priority in the order of their immediate need. CONSTRUCTION. Dunnrg the construction of Section Priority No. 1, there was a stretch of the reef that had a break of approximately 50 feet that had no suitable coral shelf for foun- dation. This was solved by filling this length with large coral boulders up to required grade. In a portion of Section Priority No. 3 adjacent to the Cargo Pier, there was no suitable reef foundation for the length of approximately 30 feet, so in this length short steel piling was driven, extending the sheet piling wall of the Cargo Pier. In Section Priority No. 4, the same’ method was used as in No. 3 where the reef was so eroded that no suitable foundation was available. Work was started on 22 March 1954. and as of 8 May, 57°¢ of the work was completed. my ee Special 100 ampere, 3 phase explosion-proot combination receptacle and breakers were located as directed by the User for use with the “Camco” trailers. Flood-lighting was provided as required to serve the area around the main building. CONTRACT ITEM NUMBER A.-74-C SEAWALL- SITE FRED ere eT epee RIT ronics Room. Criteria required that the building be explosion-prouf. 1953.