Abstract: The present invention relates to the construction of an enclosure, the cell defined thereby comprising:a floor which comprises on its peripheral edge an upwardly open border for interlocking,a ceiling which comprises a peripheral vertical flange,pillars which are disposed between the floor and the ceiling to constitute therewith a framework defining support frames determining by their succession the periphery of the framework,panels which are fitted in the border of the floor and are each removably fixed on the corresponding support frame,and O-rings which are interposed between said constructive elements.The invention is more particularly applicable to baking ovens.

Abstract: A modular shelf system has normally upright tubular post parts each extending along a post axis and having an upper end and a lower end with one end of each post part formed with an axially projecting tapered pin and the other end of each post part formed with an axially open complementarily tapered seat. Main longitudinal beams have ends each having an upper side and a lower side with one side of each longitudinal-beam end formed with a vertically projecting tapered pin generally identical to the post-part pins and the other side of each longitudinal-beam end formed with an vertically oppositely open complementarily tapered seat generally identical to the post-part seats.