The first solution for attaching HSB cavity walls to a concrete floor was the J-anchor. This is a heavy metal strip with a short bend into - you guessed it - a J-shape and a slot hole. It was specifically designed for the lower-side installation (in the recess) of HSB cavity walls on a concrete floor. The J-anchor is set to the correct height on-site using pressure plates, attached to the concrete floor, and fitted with a matching element rubber.
Over the years, insulation packages became thicker, and consequently, so did the HSB elements. Additionally, sliding doors became increasingly popular, positioning the glass line or load line on the exterior side of an element. In practice, it was found that the J-anchor did not provide enough support in these situations. As a solution, a Floor element strip with a separate angle bracket was used. This was a good solution but labor-intensive since two products had to be placed side by side. Therefore, a smarter solution was sought.