METHOD OF CONSTRUCTION OF CONCRETE SHIPS. 3 



6. The bottom and side frame steel and the keelson reinforcing steel is erected. 

 Splice bars between the bulkheads and shell are placed in position. 



7. The inside frame, keelson and side shell forms are erected to the height of 

 4 or 5 feet. 



8. Concrete is placed in the keelsons and in the bottom and sides of shell and 

 frames up to the 4 or 5-foot draught line. 



9. Bottom inside forms are removed and the concrete is pointed up where nec- 

 essary. Top surface of concrete, where it will join the succeeding pour of concrete, 

 is thoroughly cleaned and roughened. 



10. The erection of the frame and bulkhead steel is continued up to the elevation 

 of the second deck. 



11. The inside frame, bulkhead and shell forms are erected up to the second 

 deck. 



12. Inserts for pipes, equipment, etc., in frames and bulkheads are set in place. 



13. Concrete is placed up to the under side of the second deck. 



14. The inside forms are removed from the frames and bulkheads, the concrete 

 is pointed, and the upper surface which makes a joint with the next lift is cleaned 

 and roughened. 



15. Forms for the second deck beams and slab are placed, supported on inside 

 staging and props from the concrete keelsons and frames. 



16. Inserts for equipment and pipes in the second deck are placed. 



17. The reinforcing steel in the second deck is placed. 



18. The concrete is placed in the slab and beams of the second deck. 



19. The inside frame and bulkhead reinforcing steel is erected to the top deck. 



20. The inside shell, bulkhead and frame forms are erected to the top deck. 



21. Inserts for equipment and pipes in frames and bulkheads between the sec- 

 ond and top decks are placed. 



22. Concrete is placed in the shell, bulkheads and frames to the under side of 

 the fillet at the top deck. 



23. The upper surface of the concrete which makes a joint with the next pour 

 is cleaned and roughened. 



24. The top deck beams and slab forms are placed. 



25. The deck inserts for equipment, pipes, etc., are placed. 



26. The longitudinal reinforcing steel is placed in the fillet at the top deck and 

 in the deck beams and slab. 



27. Concrete is placed in, the top deck fillet, the deck beams and the deck slab. 



28. The reinforcing steel is placed in the hatch coamings, bulwarks and deck 

 erections. 



29. The forms are placed for hatch coamings, bulwarks and deck erections. 



30. The concrete is placed in all deck erections. 



31. All remaining inside forms and staging are removed and all interior sur- 

 faces of the concrete are cleaned and pointed. All outside forms on the sides and 

 bottom of the hull are removed, and the concrete is cleaned and pointed where 

 defective. 



