Skyboat Café, Mirante by Xin Yuan is a highly esteemed winner of the very prestigious 2022 A' Design Award de Ouro in Design de Arquitetura, Edifícios e Estruturas Competition Category.

OuroArquitetura· 2022

Skyboat Café, Mirante

by Xin Yuan

Client: XinY structural consultants

A' Design Award de Ouro Winner in Arquitetura Category

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Verified Award Winner
Verify Award Status for #137741

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The Design

About Skyboat Café, Mirante

O Skyboat é um edifício de dois pavimentos implantado sobre uma dolina de 613 metros de profundidade em Leye, na China. Os quartos do hotel situam-se no pavimento térreo, um café no primeiro andar e uma plataforma de observação na cobertura. A plataforma inclui um piso de vidro transitável com 10 por 12,5 metros. O edifício transpõe a estreita passagem no topo da dolina e projeta-se em balanço 34 metros e 22 metros para cada lado da crista da montanha. Um centro de gravidade baixo permite que a estrutura se equilibre por si mesma. São utilizados apenas cinco apoios, o que limita os danos à vegetação local.

The Recognition

About the A' Design Award de Ouro

Skyboat Café, Mirante conquistou o A' Design Award de Ouro, um reconhecimento imensamente prestigiado atribuído a designs de primeira linha, maravilhosos e notáveis. Os vencedores do Ouro são criações extremamente inovadoras, visionárias e glamorosamente deslumbrantes, que refletem o prodígio, a sabedoria e a proeza dos seus designers. Espera-se que Skyboat Café, Mirante seja uma invenção muito elogiada, pioneira e monumental, que oferece um valor sem precedentes. Este design vencedor do A' Design Award de Ouro é um projeto espetacular e respeitado, que beneficia muito e faz avançar as fronteiras da arte, da ciência, do design e da tecnologia. Skyboat Café, Mirante cria sentimentos intensos de desejo, evoca paixão, incentiva a criatividade e fascina-nos.

Behind the Design

Press Kit

Credits, team members and technical details provided by the designer.

Unique Properties: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole is extremely narrow which can only accommodate a small passageway. Skyboat is proposed to span over the passageway and cantilever out to each side of the mountain ridge. Similar to the tumbler toys, it is proposed to lower the structure centre of gravity and utilize the minimum area (10metres by 30metres), in which way, the self-balance of the structure is therefore achieved.
Dimensions & Packaging: two-storey building consisting of hotel rooms at the ground floor, a café at the first floor and a roof viewing platform which contains a 10metre-by-12.5metre walk-on glass floor. The building comprises a construction area of 495m2 and covers a plan dimension of 10metres by 80metres. Both ends of the building cantilevers out by 34metres and 22metres respectively. The total steel weight used is 438 tonne.
Tags: Skyboat, XinY, Glass floor, Cantilever, Leye, Dashiwei
Production Technology: There are only five supports proposed. This minimizes the damages to the local vegetation.

To protect the local plants and rivers, hanging falsework was used during the construction stage and to have the structural members installed by pieces.
Design Challenge: The structure cantilevers 36m over the 613m deep sinkhole. The top of the sinkhole（the site）is extremely narrow which can only accommodate a small passageway.
A long crack at the site indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Research: The structural system and component arrangements were adapted to the force distribution, perfectly aligned with the elegant architectural geometry.
By increasing the key strut lengths, the pre-cambering of the front cantilever structure is then achieved, which can compensate the deflections under the dead loads and some of the live loads. This also protects the glazings from large deformations.
Inspiration: A big goose, a e tumbler toy.

The long crack at the top of the ridge indicates the site is not stable. Apart from grouting the existing crack, it is also proposed to have the key struts at each ends of the building inclining towards the ridge, the horizontal component forces from which then provided the embracing forces to the ridge and hence improved the stability of the site.
Project Duration: The project started on 2018 in Leye China and finished on 2019.
Operation Flow: Visitors can enjoy coffee in the beauty of nature, or they can walk on the glass floor above the 600-meter deep pit to experience the shock of their heartbeats.
Team Members: Structural Engineers:XinY & Yuanlizhu
Client:Guangxi Leye DashiWei
Architect:Zhong Huaying Studio
Codesign:LiLi & Shanghai ZhongJian Architectural Design
Principal Contractor:China Railway 25th Group 6th Company
Image Credits: Image#1: Photographer Li Jin, Yongheng,2019.
Image#2: Photographer Yongheng, Yongheng,2019.
Image#3: Photographer Yongheng, Yongheng,2019.
Image#4: Photographer Xin Yuan, XinY,2019.
Image#5: Photographer Yongheng, Yongheng,2019.
Video Credits: Yongheng