著者

宇治 康直 秋山 哲一

出版者

一般社団法人 日本建築学会

雑誌

日本建築学会技術報告集 (ISSN:13419463)

巻号頁・発行日

vol.27, no.66, pp.1021-1026, 2021-06-20 (Released:2021-06-20)

参考文献数

5

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This research investigates elements of uncertainty (EOU) remaining after demolition work starts, through observation of the design and construction processes of an exclusively-owned dwelling unit of a condominium with a design–bid–build method. Design revision was assumed for designers to deal with EOU as of the construction contract. There was a case where EOU found after the demolition of interior brought design revision and additional construction, which influenced the construction period and cost. It is thinkable that issues caused by EOU found during the construction work increase. A contract needs to be thought for such risks among stakeholders.

著者

宇治 康直 秋山 哲一

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.86, no.790, pp.2699-2710, 2021-12-01 (Released:2021-12-01)

参考文献数

11

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This research examined the relationship between renovation work done in common and exclusively-owned areas in condominiums as well as the planning of such projects, focusing on the following three issues. 1) Timing of renovation work in common and exclusively-owned areas and issues A survey of companies with experience in condominium renovation revealed there is a correlation between work in common areas and in exclusively-owned areas, such as works in the exclusively-owned area taking place on a certain scale before or after works in common area. Planning both works together in the plumbing renovation is assumed to have an advantage in reducing risks of water leakage in the whole building by renewing both pipes in the same cycle. 2) Integration of renovation work in common and exclusively-owned areas and issues In recent years, some large-scale renovation projects have integrated work done in common areas and exclusively-owned areas to obtain rationality and other benefits. Analysis of water supply and drainage facility renovation in which the work was done in common and exclusively-owned areas at the same time has confirmed that costs of the optional works in the exclusively-owned areas can be about the same as the common areas. Also, a case study on integrated water supply and drainage facilities work confirmed that the optional works were done on about half of the exclusively-owned residential units at the same time as work on the common areas, pointing to the importance of a system for building management association efforts and a mechanism for promoting it. 3) Rule compliance and effects of rule revision Recent years have also shown that work for renovation of exclusively-owned areas cannot be done because of accompanying work on common areas due to building management agreements and other constraints. We therefore surveyed condominium management companies to clarify the actual situation of management rules and sort out the issues related to renovation work on exclusively-owned areas. The results showed that the management rules for aging condominium buildings do not cover exclusively-owned area renovations and that the rules had not been amended, pointing to the need for detailed remodeling rules to be written or existing rules revised. Furthermore, a case study of condominiums that flexibly revise rules to meet the needs of all parties confirms that rule revisions promote exclusively-owned area renovation, pointing to the need for rules and flexible rule revision that ensure that exclusively-owned area renovation work proceeds smoothly.