Hi All, I have a garden design on the go that includes a very simple pergola. It is designed to screen the view of the neighbour's house from the patio, rather than to be walked under, so is a bit narrow relative to it's height (before anyone pulls me up on that). If is a very basic structure of hardwood with 100mm square posts, 150 x 35mm beams (actually planks around the outside edges of the st…