Found another use for it, from
http://www.forgottenairfields.com/ge...tadt-s517.html
Ben Bajorek was stationed at Giebelstadt with 603 ACWS and recalls: "While I was there in the 1950s, there still existed pyramid-shaped angle iron structures on wheels that were used in the camouflage of the field during the war. They were stacked with hay and became movable haystacks that were placed to break up the hard straight line of the runway."