Skyboat Cafetería, mirador by Xin Yuan is a highly esteemed winner of the very prestigious 2022 A' Design Award de Oro in Diseño de Arquitectura, Edificación y Estructuras Competition Category.

OroArquitectura· 2022

Skyboat Cafetería, mirador

by Xin Yuan

Client: XinY structural consultants

A' Design Award de Oro Winner in Arquitectura Category

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Verified Award Winner
Verify Award Status for #137741

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The Design

About Skyboat Cafetería, mirador

Skyboat es un edificio de dos plantas situado sobre una dolina de 613 metros de profundidad en Leye, China. Las habitaciones del hotel se ubican en la planta baja, una cafetería en la primera planta y una plataforma de observación en la cubierta. La plataforma incluye un suelo de vidrio transitable de 10 por 12,5 metros. El edificio salva el estrecho paso situado en la parte superior de la dolina y vuela en voladizo 34 metros y 22 metros hacia cada lado de la cresta montañosa. Un centro de gravedad bajo permite que la estructura se equilibre por sí misma. Solo se emplean cinco apoyos, lo que reduce al mínimo el daño a la vegetación local.

The Recognition

About the A' Design Award de Oro

Skyboat Cafetería, mirador ha ganado el A' Design Award de Oro, un reconocimiento inmensamente prestigioso concedido a diseños de primera categoría, maravillosos y sobresalientes. Los ganadores de Oro son creaciones sumamente innovadoras, visionarias y glamorosamente deslumbrantes que reflejan el prodigio, la sabiduría y la destreza de sus diseñadores. Se espera que Skyboat Cafetería, mirador sea una invención muy elogiada, pionera y monumental que aporta un valor sin precedentes. Este diseño ganador del A' Design Award de Oro es un proyecto espectacular y respetado que beneficia enormemente y hace avanzar las fronteras del arte, la ciencia, el diseño y la tecnología. Skyboat Cafetería, mirador crea intensos sentimientos de deseo, despierta la pasión, fomenta la creatividad y nos fascina.

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