Porphyry stairs

Porphyry: an ideal material for stairs

Porphyry is a particular type of volcanic rock belonging to the "Atesina Porphyry Platform", an enormous complex of volcanic rocks that extends into the Trentino-Alto Adige region. These rocks, extremely varied and differentiated, both as a chemical composition and as a form of formation, are the result of an intense volcanic activity started 260 million years ago in the Permian period, and continued for several million years with a continuous repetition of eruptive phases and stasis phases. Among the various methods of deposition of these rocks, the so-called ignimbrites take on particular importance, as these are the ones that gave rise to the "porphyry". These are flows of liquid-gaseous mixtures with thicknesses generally ranging from 5 to 20 meters and with a fairly constant chemism, up to the so-called ignimbritic unit, which reaches hundreds of meters thick.

Porphyry stairs and steps

The porphyry stairs can be glossy, semi-glossy or with the natural effect.
The porphyry steps are made from slabs of considerable size, "slabs of saw", having natural quarry tops with variable thicknesses 3-4-5-6 cm.
The porphyry slabs are then sawed into the desired width, usually 30-33-35-40 cm and the long front edge is evenly thickened. The long front edge can be flamed or split.