12' x 12' octagonal summerhouse 510
Dimension A = 1511mm
Dimension D = 1511mm
Dimension E = 1511mm
Dimension H = 1511mm
Overall width = 3645mm (1067mm + 1511mm + 1067mm)
Overall depth = 3645mm (1067mm + 1511mm + 1067mm)
We recommend that your base should be no smaller than the floor size of the new summerhouse and no more than a few inches larger.