142 COLLAPSE OF TEXAS TOWER NO. 4 



felt that this would be the more practical and economical solution. It is noted 

 that without the storage provided by this leg, the tower would have a capacity 

 of 21/2 mouths' fuel with the increased demands envisioned in the pending 

 modifications. 



7. Your views on the foregoing analysis are solicited. 



A. C. Husband. 



Copy to: Cdr., 4604th SUPSQ, Otis AFB, Mass, w/incl. 



Mr, Kendall. When were these bolts finally installed ? 



Commander Foster. It was in the spring of 1959, May or June^ 

 I believe. 



Mr. Kendall. Did the Navy then again certify in writing to the 

 Air Force that the tower had been restored to its original design 

 strength ? 



Commander Foster. Substantially so. 



Mr. Kendall. Was that in writing ? 



Commander Foster. I believe it was. 



Mr. Kendall. Yon have a w^ritten communication to the Air Force 

 from the Navy certifying to the structural stability of the tower, is 

 that correct? 



Mr. Edwards. Yes, sir. 



Mr. Kendall. Would you make that communication a part of the^ 

 record ? 



Mr. Edwards. Yes, sir. 



Mr. Kendall. Had you, prior to that time, received any communi- 

 cation in writing from the architect-engineer with regard to the 

 certification ? 



Mr. Edwards. Yes, sir. 



Mr. Kendall. Will you also make that a part of the record, please? 



Mr. Edwards. Yes, sir. 



(Note. — Certification took tlie fonn of formally transmitting to 

 the Air Force a copy of the design and construction report on page 

 64 of which appeared the following statement :) 



A repair program carried out during the summer of 1959 provided for tighten- 

 ing the main bolts to draw the collars tightly around the tower legs and the 

 installation of T-head high-strength bolts through slots burned in the legs to 

 form a tight and secure connection between the collars and the tower legs. It 

 is belived that these repair operations have secured the replacement braces and 

 that the foundation structure is now operating in close approximation to the 

 original design condition. 



Mr. Kendall. Now, just one further question, Commander. 



To go back to these pin tolerances, in view of the looseness or the 

 slack in the Dardelet bolts, is it not your opinion that there would 

 have been a deterioration in the pin connections from impact until 

 such time as these T-bolts were installed ? 



Commander Foster. Well, as I stated previously, Mr. Kendall, an 

 examination was made a year after those braces were installed, and 

 no evidence of such wear was found. I do not— I shall stand on that. 



Mr. Kendall. Was an inspection made of the pin tolerances 

 throughout the tower at that time ? 



Commander Foster. Just at the upper level of bracing. However, 

 1 believe this was considered tlie critical one so far as tolerance went. 



Mr. Kendall. Did the architect-engineer — that is, the Moran, Proc- 

 tor firm — did they give a new criteria of wind and wave forces before 

 the T-bolts were installed ? 



Commander Foster. Yes, they did. 



