When I built the front door many moons ago, I didn't quite make the tenons big enough to support the weight. Its oak and its about 112cm wide or 44" in old money so that's one heavy door.
Fixed with an adjustable strap that I can tweak as required
And with a little blacksmiths flair to add authenticity.
opens and shuts now, just like .....errr.....a normal door :)