CHAPTER il, SECTION 5 isfactory operation. The same tests were made on Station 1301 and the 1302 series. ELECTRICAL. This Station was served electrically from the main switchboard in Station 70. The cab was wired with rigid conduit and with standard industrial lighting fixtures. Receptacles, signal cabinet, and phone were located as re- quested by the User. Lightning rods were provided te protect the cab from tropical storms. and obstruction lights were placed on the tower according to C. A. A. requirements to warn olf night flving aircraft. ENGINEERING. Criteria recerved on 16 April called for the use of a spare 75-toot tower cab on the tap of the 300-toot tower. Additional criteria were received on 17 December 1953. Phe feastbility of adapting the Jobsite 300-foot tower to the new conditions of loading war investigated. This involved modifving the guying system, designing new tower and guy footings. and revising the tower structure for high horizontal forces. To utilize the existing tower members. and to provide the necessary rigidity against lateral movement at the top of the tower, three sets of guys were required instead of the single set previously used on the unmodified tower. These were located at the top of the tower (elevation approximately 300 feet) and at the 100-foot and 200-foot levels. Guys at each level were anchored at the ground to a common conercte deadman L'- 0% x 19-0" in plan and 5’ - 6” deep. Someof the tower diagonals in panels adjacent to cach guy level were changed from single angle members to double angle members to mect the heavy shear loads involved. Footings under the tower legs were heavier than those used for the original tower. Drawings were started February 1953. Twelve drawings and two sketches were prepared and submitted from 16 April to 18 Decemner. Approvals were dated from 1 Mayto 19 January 1954. CONS ERUCTION, Work was originally scneduled to commerce on | September and to be substantially completed by 1 December with the exception of installation of safety devices. The entire structure was scheduled to be completed by 15 February. Actual work started on 17 September and all work was completed on 25 January 1954. Figure 2-117 notes 40° completion as of 6 October 1953. STATION 1301 CAB ON 125-FOOT TOWER SITE ELMER - USER: EG&G GENERAL. A 125-foot high steel tower exis ing from OPERATION IVY was utilized wita minor additions for technical photography. An aluminum ladder was added from the platfonn to the roof of the cab. Flooring was laid on this roof and a handrail was installed. The electr< Figure 2-117. Station 1300 - 40% Completed < ? . powcr hoist was modified by additional controls and safety devices. ENGINEERING. Preliminaryelectrical criteria were received on 6 May but adequate information to undertake the complete design work was not received until 17 August. Design work started un 7 August. Thice drawings were preparcd and submitted from !8 August to 16 November. These plans were approved from 10 September to 4 December. CONSTRUCTION. Work was scheduled to commence 3n 15 December and to be completed by 15 February 1954. Actual work started on 10 December and was completed on 16 January. STATION 1302.02 CAB ON 75-FOOT TOWER SITE HOW- USER: EG&G GENERAL. The Station was a 14-3” square x 75 foot high steel tower with a 14’-3" x 16° -3% x 77-0" high cab on top used for technical photography. The tower was used in OPERATION GREENHOUSE. dismantled, and then reassembled. On the roof of the cab, 1° x 6" flat wood flooring was added. The legs of the tower were extended and embedded in concrete. Page 2-119 bt we rth e Me eb wee beeae tet