100 COLLAPSE OF TEXAS TOWER NO. 4 



DISPARITY IN EMBEDMENT 



Senator Saltonstall. All right — i8 feet. Now, we had testimony 

 yesterday that on Texas tower No. 4, they only went down 20 feet. 



Mr. DeLong. It was 18, sir. 



Senator Saltonstall. Yes, actually 18 feet although the original 

 design called for 20 feet, I believe. There is a discrepancy of 28 feet — 

 call it 30 feet. Now, if the water is deeper at Texas tower No. 4, and 

 they only went down 18 feet, and yet you went down 48 feet on Texas 

 tower No. 2 why didn't they go down deeper on tower No. 4, par- 

 ticularly if you have a new floor as you have explained it ? 



Mr. DeLong. We don't know enough about that. Moran, Proctor, 

 Mueser, and so forth are probably the foremost foundation engineers 

 in the world. I am not in a position to make a statement that it is 

 enough or that it is not enough. I will say this ; that when we knew 

 and heard just recently that it was 18 feet, it was a surprise. But I 

 would not 



Senator Saltonstall. What was that? 



Mr. DeLong. It was a surprise. But I would not be in a position, 

 nor would I want to criticize Moran, Proctor's assumptions on that 

 footing. 



Senator Saltonstall. All right. Now, the second question I have, 

 in that same comiection : At what depth of water do you start making 

 this second floor that you are talking about, where these K bracings 

 are necessary ? 



A-Vliat was the depth of the water? 



Mr. DeLong. 185 feet. 



Senator Saltonstall. All right. The depth on tower No. 2 was 

 what? 



Mr. DeLong. It was 56 feet. 



Senator Saltonstall. All right. Now, at what depth do you find 

 it necessary to put in the K-bracing? 



]\Ir. DeLong. In a K structure, the first bracing, a triangle K struc- 

 ture, as we call it, your first bracing always starts where you are going 

 to land on the bottom — right at the ocean floor. You are supposed to 

 start your first bracing there. 



Senator Saltonstall. I have not made my question clear. There is 

 185 feet of water at Texas tower No. 4. There is 56 feet of water over 

 there at tower No. 2. Now, if you were building the tower at, we 

 will say, 100 feet of water instead of 185 feet, would you put in the 

 K-bracmg ? 



Mr. DeLong. I do not believe at 100 feet. Over a hundred feet we 

 would start. 



Senator Saltonstall. Over 100 feet? 



Mr. DeLong. Yes. I am quite sure we would. 



Senator Stennis All right. That is clear. That is a good 

 question 



Mr. DeLong. It depends. 



Senator Stennis. Continue with your story, Mr. DeLong, and point 

 out those things which you think are pertinent. You are making it 

 very clear, so just take your time and tell us the whole story, I under- 

 stand it will take you some 30 minutes or more, but that will be all 

 right. 



Mr. DeLong. Now, since you have established this level as your 

 ocean floor — that is what the theory is, and what you are trying to do. 



