*캔틸레버 글래스 나선형 계단 그리고 아쿠아리움 [ Diapo ] Cantilevered Glass Helical Staircase

수족관과 계단실의 만남은 그 자체만으로
드라마틱한 공간을 연출한다.
투명한 글래스 스텝은 나선형으로 원형 아쿠아리움을
휘감이 올라가는 스틸 스트링거의 외단부에 지지되는
캔틸레버 구조로 디자인되어 그 형태미를 한층 더 업그레이드 하고 있다.
주거에서 보기 힘들지도 모르겠지만 혹시 높으신 회장님댁에는
있을지 모르겠다. ^^

reviewed by SJ

Diapo, a London-based staircase fabricator, have sent us some images of a cantilevered glass helical staircase they designed and built around a large aquarium earlier this year.

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Description

The stair is fabricated from a single steel helical stringer with cantilevering glass treads and glass balustrade to stairs and landing.

Steelwork

- The stringer will be connected to the floor structure using a steel base plate and supported off steel CHS columns (columns by others) at 3 other locations with fabricated brackets.

- The stringer will be a customised steel parallel flange channel (PFC) running around the outer edge of the stair with a plate infill welded into the open side and ‘post-box’ cut-outs to enable the glass treads to cantilever from the stringer towards the aquarium in the centre.

Glass

- The glass treads are to be wedge shaped heat soaked toughened laminated glass 40mm thick with structural sentry interlayer.

- The glass treads will be inserted through the stringer from the outside edge of the stair and held in place using high modulus silicon and nylon packers.

- The landing glass will be supported off the PFC stringer in a similar manner to the treads.

- The glass balustrade is to be heat soaked toughened laminated glass 15mm thick clamped between the stringer and a fascia plate.

Structural feasibility

- The design loads will be taken as 1.5kN/m2 floor load for a residential building and 0.36kN/m run balustrade loading taken in accordance with BS6399:pt 1.

- The target frequency of the stair will be 7Hz with 25% live load taken as participant mass. – This means that the stair will exhibit mild perceptible vibrations when trafficked energetically, which is normal for a stair of this type.

- It is assumed that the supporting structure has been designed with adequate stiffness and strength to support the proposed stair.

from  contemporist