Aluminium ground back bars for 21' wide fold in goals are available separately
Back bars are normally used if the fold in goal is to be used on an artificial hard surface. This is because it allows counter balance to be inserted inside the ground back bar for counter balancing the goal when other forms of goal anchoring are not in place.
Note 21' back bars come as a 2 section version as standard so, longest length is 10.5' plus the insert. The back bars can be made in a single section upon request however this may effect the cost of carriage.