台灣的都市街廓普遍具有高密度混雜與多樣複合的特質。他們有如物種團塊般生長、類聚與混雜，構成都市中許多異質的縫隙。縫隙空間是一個混生世界。這環境中並存著多樣的元素，它們極度密集混雜卻又能保有個體的獨特，在周圍環境因素的影響下而不斷改變。它們彼此混雜以及緊密結合的生活方式促成了新的社會行為與群體關係，達到一種新的社會性融合。因此，面對這類多樣不定的混生環境，以往特定的建築設計模式將需要新的觀念予以重新檢討。

本設計研究將從後設設計(Meta-Design)的概念出發，企圖創造設計混生形式的生成機制，使設計在過程中能自然生長而不被侷限於特定模式。最後，將以具備「縫隙與混生」特質的台南市火車站與成功大學附近之育樂街廓為例，發展一套生成機制來示範可能的設計操作。

本設計的方法基於開放建築理論(Open Building)而發展。最小從室內單元空間開始，依「單元」、「虛體」與「虛實互換」之面向切入，分析各種平面使用下的空間尺寸關係，再逐步由建築層級推至都市層級依序探討各別的「單元空間分析 」、「區帶與區段分析」、「建築類型分析」、與其他「設計語彙研究」，最終獲得一設計機制以滿足各種形式的生成與多樣的內部填充。

複合街廓設計主要分作永恆性元素與其他可變的空間操作部份：藉由各永恆性元素的註記找回與環境重新對話的態度；檢視各種可變空間之操作結果以驗證方法機制的有效性與涵容力。本設計乃一示範性操作，目的是呈現研究方法的設計觀念與操作模式，並期望透過方法的建立對設計創作能有更多的啟發。

The high-density mixture and multiple compound attributes can be commonly found in urban blocks in Taiwan. It is why heterogeneous interstices are formed up by the species patches which are grown, flocked, or mixed from urban blocks. The interstice, which is a universe of mixed-use of multi-elements which are highly compounded but can still be kept the individuals, constantly changes under the impact of surroundings. The mixing and compound way of living contributes to the new social behavior and interpersonal relationship, and results in a new social fusion. For that reason, the old design pattern of specific architecture design needs to be reconsidered facing the multiple, unstable, and mixing environments.

This design starts with the concept of Meta-Design to create a forming mechanism for the design of mixing-forms, which will allow us to develop the design spontaneously and free from the specific way of architecture design. For its characteristic of interstices and mixing, I choose the block of Yu-le Street, which is nearby the railway station and Cheng-Kung University in Tainan, to demonstrate the forming mechanism of the design.

This forming mechanism is based on the theory of Open-Building; starts from the smallest interior space by analyzing the scale of diverse using-capacity in the aspect of “Unites”, “Void space”, and “Interchange of solid and void”; and individually study the steps of “Unites Analyzing”, “Zone & Sector Analyzing”, “Build Forms Analyzing”, and “Design for Vocabulary of Urban Level” from the level of architecture to the level of urban. So a “planning grid” will be found to satisfy any design for forming and the diversity of interior planning.

The compound block design contains the permanent elements and other unstable spaces: re-marking the permanents for a new dialogue with environments; and testing the manipulation of diverse infilling to verify the sufficiency of the forming mechanism. After all, this block design is a demonstration to display the idea and the manipulation of this design methodology. It proposes to bring in more inspiration to the creation of design.

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