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Takumi ARAMAKI ー ーーー ＊ 1Yoshihisa NAKATAーーー ＊ 2 Shuzo OTSUKAーーーーーー ＊ 3 Atsunori MIYATAー ーーー ＊ 4 For a further improvement of formwork construction, it is necessary to know actual state because of the important role of the formwork contractor. Therefore, the purpose of this study is to reveal the actual state about component materials and erection of conventional formwork by the questionnaire survey targeted to formwork contractors of Kanto and Kinki area. As a result, this paper showed the actual state of formwork construction about structural calculation for strength and rigidity of formwork, erection type of formwork by studs and separators, regional characteristics of component materials of formwork. Atsunori MIYATA ＊４For a further improvement of formwork construction, it is necessary to know actual state because of the important role of the formwork contractor. Therefore, the purpose of this study is to reveal the actual state about component materials and erection of conventional formwork by the questionnaire survey targeted to formwork contractors of Kanto and Kinki area. As a result, this paper showed the actual state of formwork construction about structural calculation for strength and rigidity of formwork, erection type of formwork by studs and separators, regional characteristics of component materials of formwork.

This study purposed for prehension about the actual situation of work from the viewpoint of formwork contractors. In this paper, we conducted a questionnaire survey about concrete form plywood, strength and rigidity of form, and formwork based on the experience of formwork carpenters in Kanto region. As a result, it elucidated the actual situation of work, concrete form plywood, strength and rigidity of form, and formwork in the construction site.

Concerning "Construction of Remaining Some Prop by Received Three-Layer" applicated in concrete formwork, questionnaire survey had been carried out about the way of structural calculation for formwork shoring and actual state of requester building. We have summarized results of surveys about structural calculation outline. And summarized results of surveys about building part necessary for structural calculation and defining required concrete compressive strength.