PURPOSE: To simplify construction work, to reduce construction unit cost and to secure strength by installing a beam installation body on the head part of an erected concrete pole and by fixing a beam like a bridge between.

CONSTITUTION: A concrete pole 5 is erected at specified height, and a beam installation body 1 is installed and fixed on the head part of this pole 5. C type steel is installed by using screw holes provided at uniform intervals in the height direction of the concrete pole 5 for installation of a wall plate or a middle beam. Thereafter, a trass construction type beam 8 using a steel pipe is fixed like a bridge between the concrete poles 5. In this case, a brace installation part in the vertical direction is provided on the lower part of the beam installation body 1 and a brace installation part in the horizontal direction is provided on the upper part. Consequently, corrosion is prevented as a support is to be the concrete pole 5, and it is possible to reuse resources in such a way as to use scrapped concrete electric poles.