建築物同層排水系設計指南與案例介紹

Overview of Same-Floor Drainage Systems in Buildings - Design Guidelines and Case Studies

建築給排水系統對居住健康與安全具有關鍵影響，其效能取決於管路正確規劃與配置。然而，由於排水通氣系統多隱蔽於建築管道空誾，其重要性常在設計階段遭到忽視。直至2003年SARS疫情之研究證實排水系統應是病媒傳播的傳染途徑，及近年新冠肺炎疫情之衝擊，促使大眾更廣泛關注排水通氣系統之效能與衛生。

In light of the inspection and maintenance difficulties associated with traditional through-slab drainage systems, and in response to the rapid development of new construction methods and equipment, on December 29, 2022, the Construction and Planning Agency of the Ministry of the Interior (now the National Land Management Agency) amended and promulgated Article 29-1 of the Building Equipment subsection under the Building Technical Regulations along with relevant provisions of the Design and Technique Directions for Building Water Supply and Drainage Equipment. These amendments, which came into effect on January 1, 2023, introduced standards for same-floor drainage systems and common trap systems. The regulations primarily apply to drainage systems in bathroom spaces of buildings with subdivided private and public ownership; at this stage, balcony and kitchen spaces are temporarily exempted. The Agency plans to consolidate practical operations and effect implementation within 3 years. The system currently remains in the promotion phase and is not yet mandatory.
The design and construction of same-floor drainage systems in buildings requires comprehensive planning prior to construction. Proper arrangements must be made for pipeline layout and equipment selection, including the choice of drainage fixtures, pipe slope design, installation of drainage and venting systems, overall height control of piping, and maintenance and management mechanisms. These measures are essential to ensure system performance and the reliability of subsequent operations.
When planning the piping and construction of an entire building or a specific section, regardless of whether the methods adopted involve sunken slabs, double-layer slabs, raised floors, front-of-wall piping, prefabricated bathroom units, or specialized joint drainage systems, the fundamental principles of same-floor drainage remain the same. Drainage pipes, horizontal branches, and sanitary equipment for the water supply and drainage system must be installed on the same floor and cannot penetrate the floor slabs separating individual units.