Roof for cylindrical tower - Toit pour tour cylindrique

Roof for cylindrical tower - (old fortified castel renovation) - Ext tower diameter = 40mm, wall = 3mm, int diameter = 17mm, total height = 55/60mm.
No support needed.

Toit pour tour cylindrique - (renovation ancien chateau fort) - Diam extérieur tour = 40mm, mur = 3mm, diam intérieur = 17mm, total height = 55/60mm.
Ne nécessite aucun support.