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Closed stringer

An inclined beam with a flat top edge. Treads attach into side grooves; their ends are hidden from view.

Closed stringer

01 /Specifics

Also an inclined beam like the sawtooth carriage, but with a perfectly straight top edge.

How treads attach

They are not placed on top — they slot into the side, into special grooves cut on the inner side of the stringer.

Side-view feature

From the side, the tread ends are not visible — they are completely hidden behind the beam's smooth surface. Closed-stringer stairs look more classic and massive.

Related articles

Sawtooth carriage

The most common and reliable type of stair beam. The top edge is cut into a «sawtooth» pattern with treads sitting on top of the teeth.

Straight staircase

The simplest classic configuration — connects two levels in a straight line, with no turns and no change of direction.

L-shaped staircase

A configuration of two flights at a right angle — forms an «L» from above. Often placed in a room corner; saves length.

Online wooden staircase configurator. Calculation and visualization in the browser, no software installation.

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