You spotted a beautiful wardrobe at a flea market or ordered a sofa online. On delivery day, bad surprise: the furniture gets stuck in the turn of the staircase. This situation happens much more often than one might think, and it can be prevented with a few measures taken in advance.
The real blockage point is not the width of the staircase
Most people take out a tape measure and measure the width between the two walls of their staircase. This reflex seems logical, but it misses the real problem. The blockage almost always occurs at a bend or landing, not in the straight part of the stairs.
A straight staircase rarely poses difficulty. Even a bulky piece of furniture can be tilted and gradually slid through. However, as soon as a turn appears, the geometry changes. The furniture must pivot in a confined space, and that’s where dimensions are no longer sufficient.
Also think about fixed obstacles: a wrought iron railing that reduces the usable space, a radiator fixed to the wall of the landing, or the entrance door that does not open flat. Knowing these tips for getting furniture through a staircase starts with identifying the narrowest point of the entire route, not just the stairs themselves.
Measuring furniture for stair transport: the diagonal method
You have already measured the height, width, and depth of your furniture. But have you thought about its diagonal? This is the measurement that really matters when it comes to tilting an object to pass through a passage.
Why the diagonal changes everything
When you tilt a wardrobe or sofa to navigate a turn, its effective dimension is no longer its frontal width. It becomes the diagonal of its largest face. A piece of furniture that measures one meter wide can exceed this dimension significantly once tilted.
Always measure the diagonal of the largest face of the furniture. Place the tape measure from one lower corner to the opposite upper corner. This value should be compared to the available space in the turn of your staircase.
The three measurements to take in the staircase
To determine if passage is possible, you need to measure:
- The width between walls (or between railing and wall) at the narrowest point, including in turns and on intermediate landings.
- The height under the ceiling in the staircase, especially at the elbows where the ceiling often drops.
- The depth of the landing, meaning the available space to pivot the furniture between two flights of stairs.
Then compare these three values to the dimensions of your furniture (width, height, and diagonal). If the diagonal of the furniture exceeds the smallest of these three measurements, passing through will be very risky.
Spiral or helical staircase: a special case
A spiral staircase requires continuous rotation. There is no landing to catch your breath or reposition the furniture. The usable width further reduces on the side of the central core, where the steps are the narrowest.
For this type of staircase, the rule changes. Only disassemblable or very compact furniture can pass through a spiral staircase. A flat-pack wardrobe, a disassemblable bed, or a sofa whose modules can be separated can still take this route. A wide monobloc piece of furniture, on the other hand, will remain stuck.
If your home only has a spiral staircase and the furniture cannot be disassembled, the question is no longer “how to get it through” but “should we consider a hoist through the window”. Giving up the staircase when it requires forcing, twisting, or multiple maneuvers avoids both injuries and damage to the walls.
Carrying angle and tilting technique on the steps
Measuring is not always enough. The angle at which you carry the furniture changes the space it occupies. A piece of furniture carried flat takes up its full width. Tilted vertically, it occupies less width but more height.
The cardboard test
Before moving day, cut a piece of cardboard to the dimensions of the largest face of your furniture. Take it up the stairs holding it as you would hold the furniture. This simulation takes five minutes and immediately reveals friction points.
A simple life-size cardboard avoids discovering a blockage with a piece of furniture weighing several dozen kilos in your arms. This is the most reliable method for non-professionals.
When tilting is no longer enough
Some pieces of furniture can be turned, tilted, or carried on edge. Others cannot. A refrigerator should not be tilted beyond a certain angle, or its circuit may be damaged. A piano cannot be tilted without appropriate equipment.
Before attempting a maneuver, check two things:
- Can the furniture withstand being tilted or turned without risk to its structure or internal mechanism?
- Does the weight allow two people to maintain control on a staircase, where balance is inherently unstable?
- Are the common areas of the building (walls, railing, paint) protected, and does the co-ownership regulations allow this type of handling?
If you have to force to get around a corner, stop. Forcing means that the geometry does not allow passage. Insisting will damage the furniture, the walls, or both.
When to give up the staircase and choose another solution
The hoist (or external lift) remains the safest solution when the staircase is not suitable. It allows you to bring furniture directly through a window or balcony, without any contact with the staircase.
This option has a cost, but it becomes cost-effective as soon as the risk of breakage or injury is real. Professional movers make this decision regularly: a piece of furniture that just “barely” fits in a staircase does not really fit. The margin for maneuvering must be sufficient for two carriers to maintain control at all times.
Dismantling the furniture is also an underestimated option. Many wardrobes, bookshelves, and beds can be partially disassembled. Removing doors, shelves, and legs reduces both volume and weight. Even a corner sofa can often be separated into two modules.
The right reflex before any bulky purchase: measure the staircase, identify the narrowest point of the route, test with a cardboard template. If passage remains uncertain after these checks, it is better to plan for the hoist right from the order rather than discovering it on delivery day.