Hello!
Is there any kind soul with more time than I have who is willing to help with a calculation?
During the construction of our house, we will be living in an Attefall house that is almost ready. However, since we have three children and a large dog, we plan to make a temporary extension in the size of a friggebod adjacent to the Attefall house. The idea is that we should be able to reuse the roof and wall elements for what will later become a sauna.
Now to the problem, the height difference on the plot is quite large, and where we will first build the extension is on the lower part of the plot. The height difference up to where the future sauna is supposed to be placed is approximately 10-12 meters. The plan is to lift the roof and wall elements with a helicopter. I have spoken with a company that can help with this and have been informed that 1000-1100 kg is the maximum weight for the lift. I want to build the wall elements as large as possible but, of course, not too large.
The construction in the first stage will be
25 mm panel
28 mm battens
120 timber with mineral wool cc 600
12 plywood
After a long explanation, to the question, where should you end up per sqm of the wall between thumb and forefinger?
Best regards,
Henrik
Is there any kind soul with more time than I have who is willing to help with a calculation?
During the construction of our house, we will be living in an Attefall house that is almost ready. However, since we have three children and a large dog, we plan to make a temporary extension in the size of a friggebod adjacent to the Attefall house. The idea is that we should be able to reuse the roof and wall elements for what will later become a sauna.
Now to the problem, the height difference on the plot is quite large, and where we will first build the extension is on the lower part of the plot. The height difference up to where the future sauna is supposed to be placed is approximately 10-12 meters. The plan is to lift the roof and wall elements with a helicopter. I have spoken with a company that can help with this and have been informed that 1000-1100 kg is the maximum weight for the lift. I want to build the wall elements as large as possible but, of course, not too large.
The construction in the first stage will be
25 mm panel
28 mm battens
120 timber with mineral wool cc 600
12 plywood
After a long explanation, to the question, where should you end up per sqm of the wall between thumb and forefinger?
Best regards,
Henrik
This is an approximation since wood's weight varies with its moisture content. Let's say dry wood weighs 600 kg per cubic meter.
Panel - 25 liters per sqm = 15 kg
Batten - essentially negligible but let's say 1 kg per sqm
Wood stud - 3.25 kg per meter, let's say 5 meters per sqm = 16 kg
Stone wool - 2 kg per sqm
Plywood - 6 kg per sqm
Total about 40 kg per sqm + approximately 10% for screws and other. Do you perhaps need wind paper too? Shall we say a smooth 45 kg?
Panel - 25 liters per sqm = 15 kg
Batten - essentially negligible but let's say 1 kg per sqm
Wood stud - 3.25 kg per meter, let's say 5 meters per sqm = 16 kg
Stone wool - 2 kg per sqm
Plywood - 6 kg per sqm
Total about 40 kg per sqm + approximately 10% for screws and other. Do you perhaps need wind paper too? Shall we say a smooth 45 kg?
With the reservation for miscalculation and/or mental slip, someone else is welcome to check and correct me.
Well, however, traditional walls are designed to withstand static forces. What happens to them when they are exposed to dynamic forces during the lifting?
Prefabricated elements, especially the lifting points, are dimensioned for these forces. A tip might be to reinforce the points you plan to lift.