addition, the outer profile strips still show the heads of the screws that hold the glass in the substructure. The circumferential glazing has glass corners that are concealed by a narrow profile. Two exit windows [...] cleaning work, with a closed pivoting function". Jürg Egli, Head of Property Management at Forster Profile Systems, explains with a grin that this unwieldy technical term clearly describes the complexity [...] development challenge. After learning of this through a Europe-wide invitation to tender, Forster Profile Systems developed a prototype as a possible system provider together with the architects. Sellien