I have a crawl space access "door" to the outside of a new addition to my home. It is about 18" high and about 30" wide. It is now convered by a piece of PT plywood that screws into PT 2x4. I access this space about quarterly, and I'm chewing by screwing into/out of it each time. I fear that the 2x4 which is nailed to the cement foundation won't lsat too long.

Any ideas on a way to have a functional access door-- can't mess up access height or width. Opening is about 4" off ground, and opens into a 4' high crawl space at the top.

Thanks!