Pyramid-type vaulting box - has adding-on straight elements allowing height alteration or assembling vaulting table from two boxes

摘要

The vaulting box consists of a number of superimposed parts (such as B and in C). Add-on elements (in D) make it possible to vary the height with little effort and, at the same time, permit assembling two such boxes to form a vaulting table of variable height (as shown). The add-on elements (D) pref. have vertical sides and fit on the part (B) below the uppermost part (two shown at the side) of the pyramid box, the uppermost part fitting on the top of each element (D). A vaulting table element may fit on the top of two such elements (D) when two boxes are placed side by side.