晋中晋南地区众多的宋、金木构遗存为此期的建筑历史研究提供了丰富的实物样本。本文聚焦于下昂造斗拱的尺度设计，是以斗拱实物为研究起点，以尺度技术解读为研究主线，以匠作示踪及其视域下的历史地理再读为研究目标的实证研究。研究以“三维激光扫描数据的精细测量与统计”，“平面、架道、斗拱原构尺度的统一与互校”，“Gephi亲缘网络分析”，“亲缘案例时空流布图示”四个主要研究方法支撑起研究起点与研究目标之间的四个研究台阶——“基础数据样本采集”、“大木尺度复原”、“尺度技术解读与案例匠作亲缘建构”、“匠作示踪”。研究获得了64个大木案例的尺度实测和复原数据，建构了以下昂造各尺度技术异同为比对条件的匠作亲缘判定体系，实现了所论案例间匠作亲缘的可视化与可量化表达，形成了所论案例各尺度技术流布的时空标尺，梳理了以“华头子”设计为例的尺度技术的时空源流和技术流变，揭示了尺度技术流布与匠人行踪的可能关联。研究结论可从“大木尺度”和“匠作示踪”两个方面概括。其一，原构形制解读、大量精准的实测数据是大木尺度复原的重要基础，精确的尺度复原是探讨大木度量单位、大木设计制度、尺度技术与时代、地域、匠帮关联性的重要依据。其二，案例亲缘网络图示是表达案例间复杂的匠作亲缘的重要手段；尺度技术流布的时空图示既可揭示匠作源流，又可为个案的营建历史研究提供“尺度标尺”，还能与匠人行踪形成互证；技术流布和匠人行踪是匠作示踪的两个主要方面，匠作示踪可以启发、丰富我们对古代人文社会和历史地理的认识。

Wooden buildings of Song and Jin Dynasties in central and southern Shanxi Province provide abundant samples for the study of architectural history. This paper focuses on the dimensional design of the eave bracket sets （dougong） that contains Xia’ang. It is an empirical study which takes eave bracket sets（dougong）as the starting point, takes the interpretation of dimensional design as the main line, takes the carpentry gene-tracing and the re-reading of history and geography as the goal. This research uses four main research methods: "fine measurement of laser scanning data", "unification and mutual correction of the dimension of chapiter plan, beam frame and dougong", "Gephi network analysis" and "temporal and spatial distribution diagram of kinship cases". These methods support four research steps: "data sample collection", "restoration of dimensional design", "interpretation of dimensional design" and "carpentry gene-tracing ".The research obtained present dimension data and restoration data of the 64 buildings, constructed a kinship judgment system based on the comparison of dimensional design technology, realized a visualization and quantifiable expression of the kinship among cases, formed temporal and spatial distribution diagrams of all dimensional conditions, combed the temporal and spatial origin of a certain dimensional technology by taking the dimensional design of "Huatouzi'" as an example, and revealed the possible relationship between technology distribution and craftsmen's whereabouts.The research has mainly formed two conclusions related to "dimensional design" and "carpentry gene tracing". First, the judgment of original design and accurate dimensional data samples are the important basis for the restoration of the dimensional design, and the accurate restoration is the important basis for studying the correlation between design technology and its background：history，geography, craftsmanship. Second, genetic network diagram is an effective way to express the complex genetic relationship between cases; The temporal and spatial diagrams of dimensional conditions can not only reveal the origin and development of design technology, but also provide a "dimensional ruler " for the study of construction history of individual building case. Technology distribution and craftsmen's whereabouts are two important aspects of carpentry gene tracing, which can enlighten and enrich our understanding of the history and geography.