The Grorich Alpha-Awnings characterized in the connection of groove track and directing wheel. The specialized rope retractable powered by spring produces stretching force and reciprocates motion straightly to make the structure more tensile and smooth completely.

 The structure is made of high tensile aluminium alloy/Zinc alloy/ ABS rosin. Both the bolt and the screw are made of high quality steel. If the size of the awnings is much longer, the total structure may be slightly drooping. The maximum suitable length is 6M and the maximum extended length is 6M.