Hello,

I am planning to build a larger furnished shed in preparation for the construction of a summer cottage.

I am building it with timber using a standard joist arrangement and insulated walls. 5-inch joists and 4-inch walls. This means that just the frame, floor, roof, walls, insulation, tar paper, etc., will weigh about 1.7 tons. On top of this will be a door, a couple of windows, and interior furnishings with a small kitchen area and bathroom. It may end up around 2.2-2.3 tons in total weight.

I want to place the shed on a wheeled undercarriage so it can be moved, and this is where I am struggling regarding the dimensioning of the iron construction. In the attached image, the construction is drawn with 40x60 square tubes.

The frame is 7 meters long and 1.9 meters wide.

Is there anyone here who has some insight into such constructions?
How substantial do the beams need to be?
 
  • Trailer frame design for mobile shed, 7m long, 1.9m wide, with wheel hubs attached. Skeletal structure shown with 40x60 square tubes.
  • 3D model of a wheeled base with a rectangular metal frame structure using 40x60 steel tubes, measuring 7m x 1.9m for a movable summer cabin.
I had been looking for a used crew trailer on wheels. I can't remember what they're called, but they're often used in roadworks. Check with your nearest Cramo or similar.

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Reasonably fresh used sheds usually cost around 20-30 thousand. I will probably be able to build this shed for around 20, and then it will be in top condition. So it doesn't feel very interesting to buy a used shed that you still have to put in a lot of work to get it in acceptable condition.
 
Borrowing the thread a bit.. Are there any maximum dimensions for how big the shed can be on such a trailer? If you get a chassis and build the shed wider than the chassis and high enough to fit a loft on top.. I'm thinking about when you then go out on the roads with it.
 
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