Abstract: A method and fixturing apparatus for manufacturing a suction caisson foundation includes providing an elevated center support and peripheral supports, elevating the foundation's prefabricated thumb section atop the center support, and temporarily securing radial frame members about the circumference of the prefabricated thumb section with the each frame member resting atop a respective peripheral support. The skirt panels are then affixed to the frame members, and the frame members to the prefabricated thumb section to thereby become self-supporting. The center support is removed from the interior of the resulting bucket, as by raising the peripheral supports to unload the center support, and lowering and dismantling the center support, whereupon additional panels are affixed to the frame members to define the foundation's lid, and further shaft sections added atop the prefabricated thumb section to complete the foundation.