COLLAPSE OF TEXAS TOWER NO. 4 207 



You see. the weiglit of the tower if you have no bracing here is 

 sufficient to buckle these legs; they would just fail like straw because 

 they were too long, so the bracing exerts, among other factors, a stabil- 

 izing influence on these legs so they don't buckle. 



Now then, if all the bracing were gone and you don't have the X- 

 bracing, it is far more likely that the buckling of this leg would oc- 

 cur without any wave forces being put on the tower at all. 



Senator Saltokstall. You would have no opinion regarding this 

 method of construction of the tower as opposed to the construction in 

 towers No. 2 and No. 3 ? 



Mr. Brewer. Yv^ell, they were vastly different, of course. Texas 

 tower No. 2 has no bracing either above the sea or below and it is in 

 much shallower water, so the legs themselves resist these translational 

 forces from the waves, and the natural frequencies are very high on 

 tower No. 2; and, well, the stresses are just a tiny fraction, and the 

 motions themselves are in the order, I think, of a few hundredths of an 

 inch as compared to several inches on this. So they are not at all 

 similar. 



Senator Saltonstall, Thank you, Mr. Chainnan. 



Senator Stenxis. Thank you, Senator. 



Senator Symington ? 



Sen.ator Symi^tgtois'. Mr. Brewer, did I undei'Stand you to say that 

 you have no opinion about the original design, as to whether it was 

 right or wrong ? 



Mr. Brewer. That is correct. 



Senator Symington. That is because you were not in on the original 

 design ? 



Mr. Brewer. That is correct. We had nothing to do with the de- 

 sign of the towers. We were merely asked to measure the motions of 

 the tower so the Air Force could determine whether there would be 

 large search radar errors. 



Senator Symington. If you were asked to measure the motion of a 

 skyscraper that had been up for 5 years, and then in the sixth year it 

 fell down, you would still feel that you did not have a right to say 

 whether or not it was designed properly in the beginning? 



Mr. Brewer. Well, I think I understand the meaning of what you 

 are saying. 



Senator Symington. It seems to me, based on your testimony, you 

 have said that many things were clone to correct this tower, but that 

 those things weren't adequate. Nothing would have had to be done 

 to correct it if the original design had been adequate, would it ? 



Mr. Brewer. Well, the original design I can't cormnent on. I be- 

 lieve it was adequate, but what I do want to point out was that this 

 tower was not built in accordance with the original design. 



Senator Symington. Then let us shift it and say the original con- 

 struction was inadequate. 



measurements above the sea indicate that subsea braces are 



ineffective 



Mr. Brewer. The original construction had either, because of fail- 

 ures in transport or for reasons unlaiowTi to me, resulted in a tower 



