Oy.  This pergola ended up more trouble than it was worth.  It is extremely lightweight and had to be secured down into cement.  The metal is cheap and bent easily in the wind.  We made so many modifications in order to make it stable and secure, it would have been better to save our money for a pergola in a higher price point.  Unless you intend to use this indoors, it is not suitable for normal, outdoor use.  :-(