I am about to embark on building an elevated deck, the third and final phase of a re-model in Southern California. The second phase was gutting and re-configuring a kitchen where a new door was added to open out onto this proposed deck. I installed a pre-hung Kolby and Kolby which is now bolted shut because it opens out onto an eight foot drop until the deck is built. The threshold extends out 1 inch from the stucco. The elevation of the threshold puts the bottom edge at 1/2 inch above the surface of the proposed deck.
I’ll spare you the gory details but we had to have engineering details modified to reduce the expense of the deck, which triggered a Supplemental Permit and then many, many go arounds with the city to get the deck design to pass. It was always designed to be an unattached deck with a certain amount of space between the deck and house. It began as 2 inches, which means I had already made a mistake by installing the door with a threshold having only a 1 inch overhang from the stucco. So, at the root of this problem I have only myself to blame. But it gets worse.
The city ultimately required that the deck have a clear 3 inch separation between it and the house. This big space is required in the event of an earthquake, giving the deck and house more of a chance of avoiding a collision. That means there will be a 2 inch gap between the deck and the outboard end of the threshold. That’s not good.
Other than breaking out the doorjamb and rebuilding it with a spectacularly deep threshold, does anyone have an idea of how this might be solved? And — even if I rebuild the door jamb and re-install, I will have a threshold cantalievered past the stucco by over 3 inches… and that, in and of itself, makes me nervous because it seems likely to fail one day, splitting just as someone puts their full weight on it.
Thanks in advance… I appreciate any and all thoughts.