Angular ladder double sided [KDF] with podłużnicą made of flat iron 40x4 or 40x5.
Can be made of steel, alloy steel, stainless [SN] or with aluminum sheet [AL],
in two options:
-microperforation along the Stringer: " in ".
-without perforation of Stringer: " n ".
Example: should I attend 400-angular ladder double sided (w 400) without perforation along the Stringer.