My new MH had soft spongy steps after a couple of months. I crawled under the MH with a light and my DW walked up and down the steps. There was almost no frame work to hold the steps. The steps weigh about 60 to 70 pounds before you put any weight on them. I welded an entire new frame work up using 1" steel angle then bolted it into place with 3/8" dia bolts. I also replaced all the cheapo 1/4" dia bolts originally holding the step in place with 3/8" dia bolts. Although I welded up new frame work. I could have just bolted it all together instead. Basically a couple of tac welds had broke loose. Steps that heavy need sturdy framework to hold them not just a few tac welds and 1/4" bolts.