Table 5.7. Input Data for Drag Estimates 
Surface Transport 
Draft (£t)2 
Platform Buoyant Support Elements iL 2 
Elevated 49 vertical circular cylinders, 
25 ft in diameter @ 43 ft 
centers in a 7 x 7 array 
Semi-Submersible| 49 vertical circular cylinders, 
26 ft in diameter @ 43 ft 
centers in a 7 x 7 array atop 
seven 36 ft diameter horizontal 
pontoons capped with hemi- 
spheres 
Twin hulls 100 x 300 ft in plan 
separated by a 50 ft gap. Each 
hull has a cylindrical trans- 
verse cross-section and is 
capped with spherical end 
sections 
~ 1. Dead load plus 25% of live load 
2. 80% of deck structure removed 
