The deck for the barge platform will probably be a combination of 
slabs, boxes and monolithic construction with the hull. Post-tensioning 
will be utilized were applicable. 
The aircraft landing strip, a relatively thick section, could be 
precast integrally with the deck boxes, but more probably would be cast 
in place after the deck was fully assembled. The deck itself would 
serve as forms for casting the strip. The option of whether the strip 
will be cast before launching or after launching, at sea, is a designer's 
choice. 
Construction techniques in practice for building systems will pro- 
vide the necessary guidance to engineer the deck systems. 
Hulls. For deep hull sections, it appears likely that cylindrical 
or curved sections will be the only efficient configurations. Cylindrical 
sections can be fabricated using any of the techniques discussed earlier. 
Curved sections can be constructed using forms or prefabricated sections. 
Both of the latter approaches have been successful in building large 
diameter tunnels and water pipes. Curved hull sections need not be un- 
usually large, but some of the unique design requirements will impose 
modifications on conventional construction practices. Monolithic 
construction employed in building concrete ships will be an attractive 
option for hull construction. 
Requirements for a Baseline Batching and Mixing Plant 
A structure as large as MOBS will be composed of as much concrete 
as is used to construct a medium-size dam. It is anticipated that 
something on the order of 2,000,000 or more cubic yards of mass concrete 
will be required for a large MOBS platform. The experiences and methods 
of construction firms engaged in mixing and placing large volumes of 
concrete, particularly dam construction, are excellent guides for evalu- 
ating the type and size of the batch plant needed for MOBS. 
For the purposesof illustration, it is assumed that the plant is 
to be designed to mix and place 1,000,000 cubic yards of concrete per 
year. A plant of this size would be somewhat as follows: 
Baseline Plant 
retoalisialoyl ob 6 6 8 6.6 46 0 6 6 0 LOOM, O00) cw sxel/saeue 
Opyerseeieyn “5 6 6 6 0 5 6 6 0 6 6 0 EMO) WOnowie giles 
Quantities handled per year 
GAW3NE 6 6 6G 6°66 6 6 6.6, 6 S000, 000 sacks 
(2,000,000 barrels) 
Coarseyagenecalteem riences O50 K00.0 tons 
Hine ageregatel as ie ienren te ee) 50000 ston's 
WEEE 6 Gg 6 6 6 6 6 0 6 0 og 5 SO,000,000 ceulllone 
