TABLE I I 

 DESIGN CRITERIA AND ALLOWABLE STRESSES 



Allowable Design Stresses 



Am. Inst, of Steel Constr 

 Code Values 



AISC values t 33^ B^''' not 

 OVER 20,000 PS I . 



Also values t 50^ but NOT 

 OVER 25,000 PS I . 



AiSC VALUES t 50$^ BUT NOT 

 OVER 25,000 PSI . 



NOTE: Case k is design condition for towing 



AND on-site construction OPERATIONS, 

 INCLUDING DESIGN OF AUXILIARY LEGS. 

 The INFLATED DOMES WILL NOT BE INSTALLED 

 DURING THIS STAGE OF CONSTRUCTION. 



|T IS BELIEVED THAT THE VALUES FOR DESIGN, WIND, WAVE 

 HEIGHT AND ALLOWABLE DESIGN STRESS LISTED IN TABLE || 

 SHOULD NOT BE REDUCED. A LARGE AND UNRESOLVED UNCER- 

 TAINTY REMAINS CONCERNING THE MAXIMUM HEIGHT OF WAVE 

 THAT MAY STRIKE THE PLATFORM SUPPORTS DURING ITS USE- 

 FUL LIFE. While the maximum possible height is 

 uncertain, there seems to be a definite probability 

 that one such wave may strike the platform supports 

 within a period of twenty years. the design has pro- 

 ceded on the basis that the occurrence of one such 

 wave may cause stresses in the structural elements 

 of the platform supports into the plastic range of 

 stress for the structural materials. however, if the 

 safety of the platform and the personnel on it will 

 not be endangered and it is believed that repairs or 

 replacements of overstressed elements can be made if 

 such a wave occurs. further, it has not been possible 

 to resolve existing uncertainties concerning possible 

 regeneration and focusing of swells coming from any 

 possible direction. therefore, it is believed that 

 some margin must be provided for such swell conditions. 

 Thus, it is believed that the design criteria values 

 SET forth in Table || are safe and reasonable, but 



that they should not be REDUCED. 



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