Steps and covers

There are three main types of steps:

Natural quarry plane steps: porphyry steps with natural plane are used for forming or covering stairs. Covers are used to demarcate, cover or protect building structures such as walls, landings, balconies, etc.
Processed top steps: worked porphyry steps and covers come with a flamed, sandblasted, bush-hammered or brushed surface. The viewed side may have the same workmanship or may be sawn or split.
Solid steps: solid porphyry steps are unique full-thickness pieces also called "solid" steps. In exteriors, their natural or flamed surface has one of the most non-slip and safe walking surfaces. The exposed rib can be split, bush-hammered, flamed, sandblasted or milled.

Porphyry steps and natural quarry plane covers

Trade name	Trentino porphyry
Color	Red, gray, red violet and rust or mixtures
Processing	obtained by mechanical splitting from stratified material with natural plane, variable thicknesses with selection of thicknesses tending to be homogeneous, or obtained by sawing stratified material with natural plane into calibrated thicknesses.

TYPOLOGY	DIMENSIONS WIDTH (mm)	THICKNESS (mm)	POSSIBLE USE	PROCESSING CHARACTERISTICS AND FINISHES	USEFUL THICKNESSES FOR LAYING (mm)
Sliced - splitted	150-200-250-300-330	20-40-50	Outdoor stairs	For covers: double sheared exposed sides with uniform thickness in the wall cover	About 80
Sliced - splitted	150-200-250-300-330	20-40-50	Covering building artifacts (e.g., walls) side boundaries (e.g., balconies, landings, etc.)		About 80
Long edge sawn and calibrated for 50 mm other sides sawn	100 - 500	30 - 40 - 50	Outdoor stairs	Sides only sawn, gauged, and chamfered sides split sides chiseled sides double exposed Dripstone Working heads seen (in the covering of walls) Polished sides	about 80
Long edge sawn and calibrated for 50 mm other sides sawn	100 - 500	30 - 40 - 50	Covering building artifacts (e.g., walls) side boundaries (e.g., balconies, landings, etc.)		about 80

Trade name	Trentino porphyry
Color	Red, gray, red violet and rust or mixtures
Processing	Obtained from stratified material with natural plane surface, variable thicknesses,or by sawing from block with subsequent surface treatment

TYPOLOGY	DIMENSIONS WIDTH (mm)	THICKNESS (mm)	POSSIBLE USE	PROCESSING CHARACTERISTICS AND FINISHES	USEFUL THICKNESSES FOR LAYING (mm)
Flamed, brushed, shot-blasted honed, polished	100 - 400 and others on request	30 - 40 - 50 - 60	Interior staircase (flamed, brushed, blasted, polished)	sides only sawn and beveled Split sides Chiseled sides Double exposed sides Drip groove Working edge seen (in the covering of walls) Polished sides	from 60 to 100 depending on the type for mortar laying
			Outdoor stairs (flamed, shotblasted)
			Covering building artifacts (e.g., walls) Side delimitations (e.g., balconies, landings, etc.)

Trade name	Trentino porphyry
Color	Red, gray, red violet and rust or mixtures
Processing	Obtained by sawing a block with subsequent surface treatment

TYPOLOGY	DIMENSIONS WIDTH (mm)	EXPOSED PROCESSED EDGES	PROCESSING CHARACTERISTICS
Natural quarry surface	Height from 60 to 200	Sawn Flamed textured surface Split	In the case of exposed sides, lateral calibration and processing is necessary
Flamed textured surface	Height from 60 to 200	To the coarse point Sawn Flamed textured surface	Beveled sharp edges
Shot-blasted textured surface	Height from 60 to 200	Bush-hammered textured surface	Presence of perimeter band with sawn quarry plane
	Height from 60 to 200	Flamed textured surface	Beveled sharp edges
		Milled	Beveled sharp edges
		Sand-blasted textured surface	Beveled edges