arm support member 46 aperture 48 is formed in first vertical part 50 and may take the form of a circular opening or an elongated slot as depicted a first ninety degree bend forms horizontal part 52 and a second ninety degree bend forms second vertical part 54 which serves as a detent as depicted in fig5 a bolt 56 is inserted into pole 12 through aperture 48 to secure cross arm support 46 to said pole cross arm support 46 is positioned on pole 12 so that horizontal part 52 serves as a support surface for cross arm 44 at the mid length region of said cross arm horizontal support surface 52 has a depth substantially equal to a depth of cross arm 44 so that detent 54 overlies a front surface of cross arm 44 at least to some extent horizontal support surface 52 provides support for cross arm 44 and inhibits rotation of said cross arm in a vertical plane and detent 54 holds cross arm 44 so that said cross arm cannot rotate in a horizontal plane about the vertical axis of pole 12 as depicted in fig5 b bolt 56 which secures cross arm support 46 to pole 12 preferably extends diametrically through the pole and when used with a suitable nut and washer secures elongate brace.