On the day the tenders for the substructures were returned, we visited Westonbirt to see the milling for the superstructure. It’s a joy, as ever, to be using timber grown on site – and even better in this case to be using 20m clear span members. These are too long for the mobile saw, and will be hewn by hand and used in continuous lengths for the bottom chords of the main trusses. We’re working once again with Charley Brentnall, who knows more about timber than almost anyone else, and also the renowned engineers Buro Happold who have an extraordinary wealth of knowledge of timber engineering. Charley has been carrying out a hewing workshop on site, with students from the Carpenter’s Fellowship..