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@raysmuckles
Stainless Steel tube 48mm in diameter with a wall thickness of 3.2mm. Height (above ground) 750mm with 300mm below ground. x Overall length of 800mm.
3.2mm wall thickness on a stainless sheffield stand (the one with detail I could find in the Architects Specifier)
Supply cost of a sheffield stand is between 50 - 125 quid each (excluding installation, hold down bolts etc) - so in many cases the item you lock the bike to is worth less than the lock itself. Where I have had influence, I have always tried to specify heavy duty sheffield stands, but most street furniture manufacturers are more concerned with asthetics than damage resistance.
That was the one I could find off the net mind - the OD varies considerably, but I would bet the wall thickness for 316 grade stainless tubing doesnt...