Navi-System: Automated Survey System for Marking Work in Construction Site

In construction of nuclear facility, there are metal works to secure and support these pipes to walls and floors. In addition, it is required to construct opening where these pipes pass through walls and floors. Metal plates are encased in and openings are installed at walls and floors while placing reinforcement. Current work of setting out encased metal plates and opening is conducted by a team of two workers who measures positions based on base line established on walls and floors by using a tape, as referring to drawings, and marks the positions on reinforcement. This work of setting out requires skilled workers and is time-consuming, and results in bottleneck of process of work. This paper reports that navigation system to detect position was developed so that any worker could easily handle it for setting out in construction site.