Making up these impressive portals are 30m continuous length beams, nearly 1m deep and 180mm wide and columns that are 1.4m deep and 4m high. While the picture above shows the portals newly installed, it is the details of the knee connection that make it all work.
The real grunt that takes care of the huge forces in the knee joint can be seen in the picture below. Twelve M20 threaded rods are embedded up to 1m into the top of the Glulam column. Two 16mm knife plates secured with 44 bolts fit into the rebates. TimberLab’s 5 axis CNC bridge is the perfect solution with its ability to accurately prefabricate these details; capable of 1mm tolerances and with specialised drilling tools that can accurately drill the 1m deep holes, proving that new and complex connections are now possible.