Armor
 
  Primary Sources  
  "General arrangement of armor, Sheet 1": Newport News drawing 52635, 10 January 1911
"Contract Plan No. 9 - Arrangement of Armor": C&R 9359, 30 September 1910
"Sheet 15": C&R 6898, undated
"General Information USS TEXAS Completed Plans 37and 38".
(Undated Newport News Shipyard manual with many 1914 entries, the last being the 12 March commissioning)
  2 Types of Armor on BB35  
Class A - on vertical surfaces
Except for Class B from Conning Tower deck down to main deck and bulkheads of the 5inch gun casemates, second deck. 
Class A contracts issued February 1911: Bethlehem Steel Corp, Carnegie Steel Corp  and Midvale Steel Corp - "1917-1918 US Navy Year" Book". 
First plate installed 7 August 1911 and the last 10 March 1914, two days before commissioning.
 Class B - on horizontal surfaces
 
One layer (sometimes two) of STS (Special Treatment Steel)
Sometimes below a layer of medium steel
No Class B used on main deck.
  Class B Tonnage Used  
Unknown - Class B 
Weight per 12" x 12" x 1" is 40 pounds. 
Drawings reference STS thickness as pounds and sometimes inches. 
Thickest plate was 4inches on turret overhead and Conning Tower
  Two Class A Tonnage Figures  
6,361.95:
Newport News Shipyard drawing 52635, 10 January 1911. 
Plate configurations matches the plate configuration data in the 1914 "General Information ..." 
The 1914 manual does not have tonnage figures
6,738:  :
US Navy Yearbook 1917-1918 identifies by manufacturers (3) their tons and price per ton
  Bethlehem 2,257 $432.97  
  Carnegie 2,207 $431.44  
  Midvale 2,744 $426.71  
     
  Cost of Class A  
1911 Drawing $2,722,541
  Navy Yearbook $2,898,758  
The 1911 price is based on the average of the three manufacturer's price
 
  Additional Armor After Commissioning  
  Class A:  No
  Class B:  Possible on 2nd Deck (1925-26 Modernization)
     
  Location of Class A  
The 1911 drawing
  2.944.00 Hull  
  640.00 Turrets  
  2,077.45 Barbettes  
222.45 Conning Tower/Central Station
470.05 Interior Bulkheads
 
  Armor Profile - Class A and B  
"General arrangement of armor, Sheet 1": Newport News drawing 52635, 10 January 1911
  Class B  
 
 
 
  Class A Hull  
 Tons: 2,944  Plates:134 (67 per side)
. . . . . Thickness (in) . .
  Frame # plates Tons Height Upper Lower Lower edge above 28ft 6in DWL Upper edge above 28ft 6in DWL Deck Level
Upper casemate 46.75-78.75 10 80 3 ft 9in 6.5 6.5 12ft 3in  at 46.75 11ft 6 in at 78.75 16ft at 46.75
15ft 3in at 78.75
about 8 inch from main deck overhead
Lower casemate  18-122 30 1,375 . 9 11 . . .
  18-47.5  6 . 6ft  . . 1ft 11.5in 8ft  just above deck of Half Deck at Fr 18 and 2 feet above at Fr 47.5
. 47.5-78.5  15 . 12ft 3in at Fr47.5 
11ft 6 in at Fr 78.5
. . 1ft 11.5in 14ft 2.5in  13ft 5.5in above deck of 2nd dk, 2 ft 47.5 & 3ft at 78.5
. 78.5-122  9 . 8ft at Fr 78.
5 7ft at Fr 122
. . 1ft 11.5in 9ft 5.5in  8ft 5.5in just above deck of 2nd deck
Main belt  18 - 137 27 1,489 7ft 11.5in . . minus  6ft 1ft 11.5in just above deck 3rd deck
. 18 - 122 23 . . . 10 . . .
. 122-137 4 . . 6 6 . . .
Hull and lower casemate plates were installed over a layer of wood to fill any gap.  In 1990, when the new mooring system was installed on the starboard side, holes were made through the hull to attach the fasteners.  Wood pieces came out during the drilling and were in good condition.
  Turrets  
Class A in red
(Side armor over a layer of wood)
Class B in blue


1.75" exterior is two partial plates

  Barbettes  

Total tons: 2077.45
Upper: 1,632.75
Intermediate: 142.00
Lower: .302.70
 

Barbette is a tapered cylinder on which the turret rotates on the top edge and inside of.
The plates are not uniform in dimensions (height and width)
  . #1 #2 #3 #4 #5  
  . Fr  25 Fr  32 Fr 35 Fr 42 Fr 83 Fr 90 Fr 104 Fr 111 Fr 114 Fr 121  
  At main deck 12" 10" 10" 12" 12" 12" 12" 10" 10" 12"  
  At 2nd deck 12" 10" 10" 7" 12" 12" 12" 10" 10" 12"  
  At half deck 12" 10" 10" 5" . . . . . .  
  At 3rd deck 5" 4" 4" 5" 5" 5" 5" 4" 4" 5"  
 
  Interior  
Tons:  470.05
 
  Conning Tower - Central Station  
Tons: 222.45



Designed but not installed was a 56.25 ton Fire Control Tower atop the Conning Tower












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