Basic EN 1995-1-1 : 2008 / 09 (Eurocode 5)
DIN 1052 : 2008-12
SIA 263/1 : 2009 + 265/1 : 200
Wood gradings / qualities, according to: EN 338, EN 1194
DIN 1052 : 2008-12
SIA 265/1
HW + HS : Isonorm
(HW=HM, TCT / HS=HSS)
L S
Step length Hardwood  D30
EN 338

 

 

 

mm mm
900  36* – 40
1000 40* – 44
1100 40* – 44
1200 42* – 46
mm mm
900  36* – 40
1000 40* – 44
1100 40* – 44
1200 42* – 46
mm mm
900  36* – 40
1000 40* – 44
1100 40* – 44
1200 42* – 46

* Static requirement, in case of inferior dimensions, change steps.

Indoor stairs

Pedestals stairs: In general, suitable for all buildings.
Straight stairs: By apartment buildings; consider half-pace.
Helical stairs: Mostly in one-family houses.
Spiral stairs: Unapt for main stairs.
Steep stairs: Alternately step, limited admission, alley ≥ 500 – 700mm, handrails on both sides.
Safety: Opening ≤ Ø 120mm.
Half-pace: After 18 steps at least.
Raising proportion: 2 x ↑ + 1 x ↔ = ~ 620 – 630mm (walk line area).
Walk line: From the interior; spiral stairs from the exterior.
Step depth: At the walk line ~ 250 – 290mm. At the inner well side string ~ 120mm.
Passage width: In one-family houses ≥ 800mm, in apartment buildings ≥ 1100mm.
Wall distance: Steps and half-paces ≤ 50mm, handrails ≥ 50mm.
Balustrade height: For stairs and balustrades ≥ 1000mm.
Handrails: Step-leading edge – handrail-upper edge ↑ 800 – 900mm. Ø 40 – 50mm.