![30,000 Lb. Load Type F Variable Spring Hangers 30,000 Lb. Load Type F Variable Spring Hangers](https://farm2.static.flickr.com/1296/4680025930_c977f187d7_o.jpg)
Pictured above are special Type F variable springs being prepared for shipment overseas. Finite element analysis was used to specify stronger load columns to allow for a possible 30% lateral load. Loads as high as 30,000 pounds were required for some items. These variables also required a special three coat paint (white).