Door Threshold question
I have a walk-in exterior door in my garage that needs a new threshold on the cement floor. I think I've found the threshold I might need, but it's only for a 2x4 wall and I need one for a 2x6 wall. So I'm curious if I can find a threshold for a 2x6 wall or an extension for the 2x4 threshold. Where can I find a threshold with these specifications and how might I install said threshold:
-30 inch door
-1 3/8"-1 5/8" from floor to bottom of door
Thanks for any help in advance! This is a little urgent because there is currently no threshold there and water is coming into my garage!