Bolt staircase

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Cantilever bolt staircase with granite steps

A bolt staircase (southern German and Austrian bolt staircase or self- supporting staircase ), also known as a bearing bolt staircase , self- supporting or free-hanging staircase , is characterized by its filigree construction. Bolt stairs can be built from glass, wood, stone or metal. The designation bolt stairs comes from the way this type of stairs is fastened. The steps are connected to one another with bolts. With cantilever bolt stairs made of granite or wood, the stair bolts are also attached to the masonry with wall anchors.

construction

A cantilevered bolt staircase does not require steel structures as a base. It consists only of steps, stair bolts and wall anchors. The steps of a bolt staircase are fastened directly to the masonry with rubber-mounted bolts. There are individual support bolts made of metal or wood between the individual steps, which means that no additional stringers are required as with other stairs.

Types

A distinction is made between straight and spiral bolt stairs. With straight steps, all steps have the same shape and tread width. Spiral bolt stairs have steps of different sizes (steps).

Stud types

  • Bolts for bolt stairs in pure stainless steel type 27

  • Bolts for bolt stairs, chrome-plated, type 27

The typing of the bolts is based on the slope or slope of the stairs. The most common type of metal stud is type 27.

Wall-free (WF) two-bolt stairs with two stair bolts are usually used in single-family houses. Wall-integrated bolt stairs (WE) with a stair bolt in the stairwell (WE1) are also used.

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