Power: Steel is more powerful than aluminium, but selected aluminium alloys can be extremely strong although remaining lightweight. The only lighter metals are the metals of groups one and a pair of, which aside from beryllium and magnesium are much too reactive for structural use (and beryllium is incredibly harmful).[32] https://shedsandgarages56788.newsbloger.com/38264978/5-simple-techniques-for-aluminium-greenhouse