COLLAPSE OF TEXAS TOWER NO. 4 139 



Commander Foster. That is right, sir. 



Mr. Kendall. Now, did you contact Moran, Proctor, the architect- 

 engineer, about that situation ? 



Commander Foster. Moran, Proctor were kept in close touch with 

 all developments that had any structural significance on the tower. 



Mr. Kendall. Did you have any written communication with them ? 



Commander Foster. I believe we did, sir, but I cannot be sure. We 

 did a lot of telephone business ; we consulted together, we wrote back 

 and forth. I am positive that we consulted in this case, but I can- 

 not recall. 



Mr. Kendall. Will you check and see if you do not have a letter to 

 them and a reply from them with reference to the situation ? 



Commander Foster. Yes, I have a letter from Moran, Proctor to 

 the officer in charge, dated December 5, 1958. 



Mr. Kendall. Was that in reply to a letter that had been written 

 by you ? 



Commander Foster. It refers to a letter of December 2, 1958. 



Mr. Kendall. Will you make both of those part of the record, 

 please. Commander? 



Commander Foster. Yes, sir. I think one we shall have to pro- 

 duce, sir. We have the December 5 letter here. 



Mr. I^JENDALL. You may furnish that. 



Senator Stennis. All right. Those letters will be made a part of 

 the record. 



(The letters referred to are as follows :) 



Decembeb 2, 1958. 

 MoKAN, Proctor, Mueser & Rutledge, 

 JjlS Madison Avenue, 

 isfew York, N.Y. 



Gentlemen : Your letter of 28 October 1958 states that the scheme indicated 

 on Steers Morrison, Knudson sketches showing details and arrangements of the 

 T bolt for fastening the collar of the replacement bi*ace to the A leg of TT 4 

 will result in the best possible solution of the problem fixing the collar to the leg. 



However, this office has been requested by the Air Force to issue a statement 

 in writing advising if the stability of TT 4 will be as secure after the repairs are 

 made to the collar at A leg as originally designed or more specifically will the 

 high tensile T bolt now being installed make a more secure connection than that 

 provided by the Dardelet bolts. An early reply will be appreciated. 

 Very truly yours, 



Joseph G. A. Riccio, 



Assistant to ROICC. 



December 5, 1958. 

 Officer in Charge of Construction, 

 Texas Towers NOY Contracts 

 Navy Buildivfl. 

 495 Summ^er Street,. Boston, Blass. 



Dear Sir: We have your letter of December 2, 1958, requesting a statement 

 regarding the adequacy of Texas tower No. 4 bracing after affixing the collars 

 of the replacement with the new high tensile T-bolts. We believe that, when the 

 present program of retightening the main bolts and installing the T-bolts to the 

 proper tension at the connections at the bottom of the two diagonal replacement 

 braces is completed, the structure will be as strong or stronger than with the 

 original arrangement utilizing the Dardelet bolts and that the bracing thus 

 restored will be substantially equivalent to the original design. 



In the original design we had complete freedom as to arrangement of struc- 

 tural members making up the connections and were able to establish the correct 

 working points for the intersections of the members, but we were unable to 

 achieve such conditions with the replacement braces due to various inter- 

 ferences. Therefore there exist some secondary stresses which are not present 

 707.33—61 10 



