TSTC

TSTC derivations for circular duct in galvanized steel sheet Z275, aluminum or stainless steel AISI 304 or 316L, spiral type, type Spiro. Dimensions and tolerances according to EN 1506/2007, thicknesses and reinforcements according to 34 SMACNA. The galvanized sheet complies with the standard EN 10346 – continuous hot-dip coated steel flat products – DX51D type with a minimum of 275 g/m2.

Minimum tightness class C according to the norm EN 12237.