u/Visual-Activity2678

I graduated last year and started working at a small architectural firm. I’m still struggling to comprehend structure and recognize how things come together. I’m currently watching videos of people putting decks together and talking through it, as well as looking at images online but thought an outside opinion would be helpful. Would someone be able to break this down further for me and explain how this all comes together and what it would look like? This deck will be built to support a hot tub and it is directly attached to the building.

My boss (our firm’s architect) says to include tpo over 3/4” plywood, and that he wants to cut the edges so that excess water will slope down and into a gutter.