The B01 Roof Brace can be purchased separately for additional bracing on your greenhouse. It comes with the fasteners to attach it (6x S04/M01's).
Glasshouses with single run lengths of 10ft and longer (not 8ft extension) come with the B01/B02 roof and eave braces. If you are purchasing a model that does not come with the braces, you can buy them separately here.
The intent of these braces is to help support the weight of the glass roof, but can also be added for extra strength in high wind zones for any size.
