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The walls were formed using a construction method called Polysteel. Polysteel blocks are made of steel and compressed foam. As you can see from the pictures below, these blocks start out hollow. First, the blocks are put together with wire and steel reinforcing bar in the vertical and horizontal cells. Next, the walls are filled with concrete leaving a structure similar to a large concrete waffle. The exterior surfaces of the building are covered with brick and block veneer; the interior with 5/8 inch thick, fire-resistant gypsum board.

                        These pictures show how the Polysteel walls were constructed

  
Stacks of Poly-Steel foam blocks           A look at the inside of the               Beginning to form the walls.
prior to being used in construction.        Poly-Steel foam blocks.

     
This photo shows the inner walls      From this photo you can get an idea    Looking down into the wall cells
around the dispatch room; the         of how thick the walls are, and this     before they are filled with
outer walls would come next.           doesn't include the brick or drywall.     concrete.

     
                        Pumping the concrete for the walls.                             
 

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