We took one apart twice to find the part that fails first. It was a bolt, not the frame.
Most sofas die in a doorway. Not because the frame gives up, but because a piece built as one solid volume cannot turn a corner, so it is lifted, tipped and dropped until something in the corner block gives way.
Take out four bolts and our three-seater becomes a base, a back and two arms. That single decision is why it survives a move: nothing has to be levered, and the parts that take the abuse are replaceable.
We learned it the slow way. Prototype two had a glued frame that tested beautifully in the workshop and failed in a stairwell in Nørrebro.
“A joint you cannot undo is a joint that decides when the piece dies.”
That is the whole method: bolts instead of glue, covers that zip off, spares kept for ten years past discontinuation. Repair is not a service we sell — it is a property of the design.