I tried a triple wall box for my kid's castle and it caved in on the second night
So I built my daughter a 5 foot castle out of triple wall boxes I grabbed from the bike shop on Maple Ave, thinking the thick walls would hold up way better than the regular ones. Wrong. The thing got top heavy and the whole tower folded in by Tuesday, mostly because I taped the seams instead of bracing the corners with scrap wood. Next time I'm cutting the walls down to 3 feet and running a wooden frame up the inside. Has anyone figured out a good way to brace a tall box structure so it doesn't tip?