The staircase as an assembly of simplysupported beams

Burkard, Meyer & Partner: Services centre in Winterthur (CH), 1999

Figs 30 and 31: Section and plans

Fig. 32: Staircase

Burkhard Meyer & Partner: Service centre, Winterthur (CH), 1999

Figs 30 and 31: Section and plans

Reconstituted stone element

Neoprene pad (seen on elevation)

-Support element

Downstand beam (seen on elevation)

•In situ concrete floor -Suspended ceiling

Fig. 33: Detail of support

Fig. 32: Staircase

Burkhard Meyer & Partner: Service centre, Winterthur (CH), 1999

Reconstituted stone element

Neoprene pad (seen on elevation)

-Support element

Downstand beam (seen on elevation)

•In situ concrete floor -Suspended ceiling

Fig. 33: Detail of support

Balustrade/deep beam

Reconstituted stone stair flight

Neoprene pad

Downstand beam

Reconstituted stone stair flight (seen on elevation) -Joint between two reconstituted stone elements (seen on elevation)

-Balustrade element "In situ concrete floor

The mainly single flights of stairs in the access tower to this high-rise block connect storey heights of up to 4.5 m. This results in large spans for the individual stair flights, which are made from precast, solid, dark reconstituted stone.

As the load-carrying capacity of this reconstituted stone material is less than that of conventional concrete, four precast concrete elements are responsible for the loadbearing functions of the stair flights. These act as primary beams spanning between the supports. While one of these beams is in the form of a conventional downstand beam, the other is in the form of a deep beam and simultaneously acts as the balustrade. At the ends these beams are supplemented by two support elements (L-shaped in section). The reconstituted stone stair elements are laid on these loadbearing elements, with neoprene pads ensuring that no impact sound is transferred to the primary loadbearing members. The verticality, the physical presence and the accuracy of the precast elements determine the expression of the stair shaft.

Fig. 35: Section through stair shaft

Fig. 34: Cross-section through stair

Fig. 35: Section through stair shaft

Balustrade/deep beam

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