卡尔加里市需要在市中心修建停车场，以便腾出多个开发地块。而考虑到停车楼在未来可能会被废弃，市政官员希望得到创造性的解决方案，从而保证现在和日后的财政支出都是合理的。由此，5468796建筑事务所和Kasian建筑事务所应卡尔加里市政土地公司和卡尔加里停车管理局的要求，设计了一栋有510个车位的停车楼，它可以很轻松地转换为办公室、轻工业建筑或住宅建筑。该项目所在场地毗邻新卡尔加里图书馆、卡尔加里市政厅和贝尔工作室（国家音乐中心），此外，一条地下轻轨隧道穿过基地中部，根据地役权规定，该区域不得进行建造，也就是说，该市确定的可建面积损失了20%。

The City of Calgary required a downtown parkade to free up multiple lots for development. Understanding the likelihood of the building’s future obsolescence, municipal officials also wanted a creative solution that would justify the expenditure now and in the future. And so the clients, Calgary Municipal Land Corporation and the Calgary Parking Authority, asked the collaborative team of 5468796 Architecture and Kasian Architecture, Interior Design and Planning to design a 510-stall parkade that could be easily converted into an office, light industrial or residential building. The project site – adjacent to the new Calgary Library, Calgary City Hall and the Studio Bell, (the National Music Centre) – included an unbuildable easement for an underground light rail tunnel, which cuts through the middle of the project site and represents what the city determined was a 20% loss in buildable area.

▼项目概览，general view

设计团队打造出椭圆形螺旋建筑，它跨越不可建造的地方，从而恢复了大部分损失的土地价值。车辆从地面进入，直接穿过不可建造的地方。椭圆体量创造出宽阔的内部庭院，薄楼板允许日光和通风从多个方向渗透到室内——这对转换新用途来说至关重要。楼板以1-2%的坡度逐渐上升，以避免日后被拆除。4米高的天花、净跨度和通用的承重能力有助于以低成本完成逐步改造或大规模改造。

The design team’s solution is a building in the form of an elliptical helix, bridging the easement and thereby recapturing much of the lost land value. Vehicles enter at grade, directly over the easement. The ellipse creates a street-wide interior courtyard and shallow floor plates allow daylight and ventilation to pervade the interiors from multiple directions – critical features should the structure be converted to a new use. The floor plates ascend on a 1-2% gradual slope to avoid the need for vehicular ramps that would require eventual removal. Ceiling heights of 4-metres, clear spans, and universal load-bearing capacity contribute to a variety of gradual or wholesale changes with low-cost ramifications.

▼总平面图，site plan

车辆入口的净空允许地下隧道进行维护，两侧为行人入口和自行车入口，以及篮球场等活动场所。它们激活了建筑沿着第九大道的临街界面，并且构成发展中的东村社区的南部边缘。球形护柱、脚下的彩色混凝土图案和交通镜天花使中央庭院充满活力并且具有独特而难忘的美感，此外，这里还配有咖啡露台和室外展览空间等公共设施。该结构被包裹在独特的保护罩内，保护罩四周巧妙地抬起，为行人、自行车和车辆提供通道。保护罩由细密纹理的网格组成，如今被用作行人防护栏，日后也可以无需多余操作，轻松且低价地转换为住宅或商业建筑的阳台。

The vehicle entrance, with clearances that allow for maintenance of the underground tunnel, is flanked by pedestrian and bicycle entrances, and activities such as a basketball court. These activate the frontage along 9th Avenue SE and frame the southern edge of the developing East Village neighbourhood. Spherical bollards, coloured concrete patterns under foot, and a traffic mirror ceiling ensure the central courtyard is a lively and vibrant place with a distinctive and memorable aesthetic, enriched by additional public amenities including a cafe patio and an outdoor exhibition space. The structure is enveloped in a distinctive guard shroud, raised strategically around the perimeter to provide pedestrian, bicycle, and vehicular access. The members of the shroud hold a fine-grained mesh that acts as a pedestrian guardrail today, while easily and inexpensively accommodating conversion into residential/ commercial suite balconies with no additional work required.

▼结构被包裹在独特的保护罩内

the structure is enveloped in a distinctive guard shroud

▼临街界面，frontage