Calculation of wooden stairs

A wooden ladder on bowstrings is a simple traditional solution for rooms of various purposes. A convenient option for multi-level apartments, offices, country houses and cottages, places with intensive traffic and entertainment venues. In addition, it looks good and neat in any interiors, it is reliable in operation and easy to design. In order to design it professionally, the user can apply the calculation of a straight wooden ladder on bowstrings with drawings and implement the resulting project on their own.

Opening height a, mm

Ladder projection length b, mm

Stair width c, mm

Number of steps d, pcs
Step thickness e, mm

Step edge protrusion f, mm

Riser thickness g, mm

Bowstring thickness h, mm

Upper string width margin i, mm

Bowstring width margin below j, mm

Change up direction
Upper step at the floor level of the second floor
Upper step below floor 2nd floor