Table 3.2. 
Platform 
(1) Wgt, structural concrete 
Semi-Submersible/ Wgt, ballast concrete (LT) 
Single Level Deck Wgt, water ballast (LT) 
Wgt, total (LT) 
Elevated/Single 
Level Deck 
Draft (heavy) 
Freeboard (heavy) 
Deck clearance 
(2) Wgt, structural concrete 
Semi-Submersible/ Wgt, ballast concrete (LT) 
Multi-Level Deck Wgt, water ballast (LT) 
Wgt, total (LT) 
Draft (heavy) 
Freeboard (heavy) 
Deck clearance 
Wgt, structural concrete 
Wgt, ballast concrete (LT) 
(3) 
Wgt, water ballast (LT) 
Wet, total (LT) 
Draft (heavy) F 
Freeboard (heavy) 
Deck clearance 
Wgt, structural concrete 
(4) 
Elevated/Multi- Wet, ballast concrete (LT) 
Level Deck Wgt, water ballast (LT) 
Wgt, total (LT) 
Draft (heavy) 
Freeboard (heavy) 
Deck clearance 
(5) Wgt, structural concrete (LT) 
Barge Wgt, ballast concrete (LT) 
Wgt, water ballast (LT) 
Wgt, total (LT) 
Draft (heavy) (FT) 
Freeboard (heavy) (FT) 
Deck clearance (FT) 
1. All weights given in long tons. 
M1: 300' x 300! 
Tabulations for draft, freeboard and deck clearance are for 
conditions of full uniform live load throughout. 
Preliminary Design Specifications for MOBS Platforms 
Platform Size 
M2: 400' x 1,200' M3: 1,000' x 4,000! 
450,000 3,760,000 
45,000 378,000 
171,000 1,420,000 
666,000 5,560,000 
390,000 
121,000 
289,000 
800,000 
330 
5,060,000 
1,470,000 
321,932 
0 
2,687,800 
0 
0 
2,687,000 
0 
321,932 
63 63 
62 62 
60 60 
3-23 
