All the welded joints are superior mig welded for strength choose a phosphetised then oven baked painted finish or the 50 micron hot dip galvanised which conforms to bs en 1461 galvanised for all weather protection stand off 10 requires 2 x u bolts not supplied 40 x 40 x 3mm hd angle iron arms and backs plus mid support of 25 x 5mm solid bar for maximum torsion strength one piece steel bracket galvanised finish