Risers

Technical data sheet porphyry risers

RISERS – UNI EN 12058:2005

1) Natural quarry face – variable thickness

2) Processed surface: flamed, brushed, sand-blasted, honed or polished

CONSTANT THIKNESS
Petrographic name Rhyolitic ignimbrite
Colour Non-dominant variable-colour grades: grey, red, red-violet, rust or mixed colours
Main processing 1) from stratified material with a natural plane, variable thickness, sawn edges;

2) by block sawing and subsequent surface treatment
TYPE DIMENSION

(mm)

free lengths		 THICKNESS

(mm)		 SUGGESTED APPLICATION PROCESSING AND FINISHING CHARACTERISTICS USEFUL LAYING THICKNESS (mm)
Quarry plane Height > 60 from 10 to 25 Cladding for outdoor steps Exposed edges require side shims and adequate processing Consider space more than 2,5 cm to which bedding must be added
Surface flamed,

brushed

sand-blasted,

polished		 Height > 60 fixed 20 Cladding for outdoor-indoor steps Exposed edges require adequate processing