Hello. I am planning to extend part of the balcony over a wooden deck. How should I plan this to avoid having multiple posts in the middle? Is it possible to have a double beam with 45x170 just before the middle and then one at the outer edge? Between the two beams, there is 1500mm. I plan to have the floor joists with a spacing of 560mm (the image states 600) and intend to attach them with joist hangers to the existing balcony, and then they will rest on the beams. Will this hold, or do I need to completely rethink my approach?