| 摘要 |
PROBLEM TO BE SOLVED: To provide an aluminum alloy extruded tube material for an electric railcar line support such as an electric pole and/or a beam capable of fixing a constitutive part for the electric railcar line support such as a lower strut, a bracket, a crossarm and a branch line in a short time with excellent workability by using a small and lightweight metal instead of a conventional large and heavy band-shaped metal. SOLUTION: The outside surface of a flange 7f of the cross-sectional T-shaped holding/fixing object part 7 is contacted with the reverse of a flange 2f of, for example, a cross-sectional T-shaped holding/fixing projection 2 formed on the outside surface of a tube material 1 so that the flange 2f and the flange 7f of the holding/fixing object part 7 are gripped by left/right U-shaped cross-sectional clamp metals 8, 8. An aluminum alloy extruded tube material forming the projection 2 capable of holding/fixing the holding/fixing object part 7 by fastening bolts 8b, 8b in the tube material 1 at extrusion time, is used as an electric pole and/or a beam.
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