We need the clear width of the opening, how tall you want it, and what it will fix to, existing piers, a wall or posts we build fresh. A site by the river often slopes across the gateway, so mention that too.
A few photographs of the gap, a rough sketch, or pictures of a look you like all help us picture the job, along with your choice of finish. Planning to automate it later? Say so early, so the frame and bracket positions suit your installer.
Our part is the steel, cut, welded and hung. Piers, walls, foundations and any digging belong to your builder, and automation is fitted by a specialist of your choosing. We can hand both of them the dimensions they will need.