1.Previous
3.Next

clusters was patented, with photographs and illustrations, contained in a 1907 book, "The Design Of Walls, Bins, And Grain Elevators". In 1910, MacDonald published a paper "Moving Forms for Reinforced Concrete Storage Bins," describing the use of molds for moving forms, using jacks and concrete to form a continuous structure without joints or seams. This paper details the concept and procedure for creating slip form concrete structures. On May 24, 1917, a patent was issued to James MacDonald of Chicago, "for a device to move and elevate a concrete

1.Previous
3.Next