Gradall began making its famous excavator during the 1940's, during a time in which World War II had caused a shortage of laborers. This decrease in the labor force brought a huge demand for the delicate work of grading and finishing highway projects.
A Cleveland, Ohio construction business known as Ferwerda-Werba-Ferwerda experienced this particular dilemma first hand. Two brothers, Koop and Ray Ferwerda had moved to the USA from the Netherlands. They were partners in the firm which had become among the leading highway contractors in Ohio. The Ferwerdas' set out to make a machinery which would save both their company and their livelihoods by making a unit that would do what had previously been physical slope work. This invention was to offset the gap left in the workplace when a lot of men had joined the army.
The first apparatus these brothers invented had 2 beams set on a rotating platform and was fixed directly onto the top of a truck. They used a telescopic cylinder to move the beams in and out. This enabled the fixed blade at the end of the beams to pull or push dirt.
After a short time, the Ferwerda brothers improved on their initial design. They created a triangular boom to produce more power. Then, they added a tilt cylinder which allowed the boom to rotate 45 degrees in either direction. This new model can be outfitted with either a blade or a bucket and the attachment movement was made possible by placing a cylinder at the back of the boom. This design powered a long push rod and allowed a lot of work to be completed.
Not a long time later, many digging buckets were introduced on the market. These buckets came in 15 inch, 24 inch, 36 inch and 60 inch sizes. There was additionally a 47 inch heavy-duty pavement removal bucket that was available as well.