It definitely takes two people to put this box together, considering the big size, sturdy material, and the fact that it will sway. Please read and follow the instructions carefully. Only three out of the 4 panels are to be put in place before the 2 steel rods are inserted, then panel C of the box gets put in/attached. (If you somehow mess this part up, like we did, you have to undo all of the clicks and latches and that is, let’s say, a little difficult to say the least.) The fitting together/clicking is a bit tough, as the materials used are extra thick. Some friendly force needs to applied when putting this entire box together (other than the screws - that needs a drill). You will need to find a good way to sort of pound the pieces into place… some parts take a bit of a punch…..
This deck box is strong enough to support people sitting on top, which is always good to know, since it will happen irrespective. Right now we are using it for storage inside our garage, but I think we are going to be getting another one and will use that for outside storage - but at least we know, firsthand, how to put it together. I hope this helps you make an educated decision to purchase a BLUU storage deck box - 120 Gallons is massive! Worth the price. Love the box. 💜