Abstract
The first object of this study is to grasp the actual condition of the siding wall construction in a detached house. The second object is to find out primary influence factors in constructability and propose concrete solutions for the problems. The final object is to study on relations between constructability and joint rayout design for the siding in a detached house. The authors undertook a survey on construction works of the siding wall in a detached houes. The results and the considerations of this paper are as follows ; 1. In the term of worker-time, the more complicated the shape of a board is the longer time is needed. For example, some board of complicated shape needs twice or three times as long as a rectangular board's. 2. In most of the cases the boards of complicated shape appear around the openings, this fact can help us the layout of joint on the exterior wall. 3. As the result of simulation in worker-time, the worke-time needed in construction is subjected to the joint layouts' influence.
