200 COLLAPSE OF TEXAS TOWER NO. 4. 



duce the tower motions, the X-bracing- might or might not be in- 

 stalled, depending upon whether it would aggravate the loading on 

 the tower, but certainly the underwater bracing must be repaired to 

 make the tower agree with what the designers had planned for in the 

 way of strength and motion, but primarily strength. 



Mr. French. Well, if you had no bracing under water, what would 

 be the effect on that column? 



TOWER LEG W^OULD BUCKLE WITHOUT UNDERWATER BRACES 



Mr. Brewer. We have only cursory computations on this, and 

 these are therefore only given as an opinion. But it appears from 

 these computations that you would have the collapse of one leg if the 

 tower bracing were nonexistent. 



Mr. French. Did you include, within that cursory examination 

 combinations of bracing failure which might lead to column failure? 



Mr. Brewer. No, we didn't make that exact computation. This was 

 just a quick column computation, and it was based on assuming that 

 the concrete maintained its bond, and also assumed fixity of the ocean 

 floor and some other things like that; and again, I must add that this 

 was a very cursory computation. But it did appear that the column 

 failure was — it was marginal so far as strength in a simple column, 

 and actually this was a beam column, which makes things even worse. 



Mr. French. Mr. Chairman, we would like to have the reports of 

 Brewer Engineering Laboratories, Inc., introduced as part of the offi- 

 cial filas of the subcommittee. 



Senator Stennis. Very well. It will be incorporated at this point, 

 Mr. Reporter. 



(The document referred to will be found in the subcommittee files.) 



Mr. French. I have no further questions, Mr. Chairman. 



Senator Stennis Mr. Brewer, I have a few questions to ask. 



It seems to me, if I understand the latter part of your testimony, 

 that you said that unless the integrity of the tower bracing was 

 restored beneath the water, in your opinion, that it would lead to a 

 collapse of the tower. 



Did I undei-stand you correctly? 



Mr. Brewer. No 



Senator Stennis. I want to be certain. 



Mr. Brewer. No. The question, I believe, was, should the tower 

 bracing be repaired before the X-bracing was installed. 



Senator Stennis. Yes. 



RESTORATION OF SLTBSEA BRACING DEEMED MOST IMPORTANT FACTOR 



Mr. Brewer. And I felt that the most important thing was to try 

 to restore the integrity of the bracing beneath the sea. 



Senator Stennis. Yes. 



Mr. Brewer. Because unil that was done the tower did not have the 

 strength that the designer had planned for. 



Senator Stennis. Yes. 



Mr. Brewer. This is an opinion. 



Senator Stennis. Well, I understood that. 



Mr. Brewer. I would not predict collapse. 



