almost 3 years ago

During construction, the concrete that makes up the building's half-spherical ceiling had to be poured from the bottom up into wooden frames that formed successive concentric rings. But to ease the immense tensile stresses Perucchio mentioned, the builders used progressively lighter volcanic rocks as aggregate as they got closer to the dome's apex as well as making the walls themselves thinner.

อ่านต่อได้ที่ : โรงเรียนบ้านยูงงาม

สาระน่ารู้ : คลอด