The floor joists

The woodworking parter, Stump Holzbau AG came, delivered and installed the custom made floor joists today.
They are quite hefty items at 100x200mm
This is required so that they can span the entire width of the Gardequb with no middle support.

Here you can see them with black plastic water protection membrane over the top of them.
You may be able to see the splaying of the joists toward the ends so the joist hangers would not go lower than the 150mm steel square pipe elements which the Gardenqub is made from.

 

The end joists had to be made so that they were not 200 deep. Together with the 24mm flooring thickness would have meant that the end joists would extend below the metal elements by 74mm. This would have been easily visible underneath the metal elements and would have disturbed the optical cleanliness of the overall design.

So these joists are only 100x120mm and to compensate for the loss of structural integrity, they were bolted to the steel elements in 3 places.

The spacer you saw in the previous image is because of the joist hanger bolts which force the joist to be about 18mm free of the metal frame.

Here is another view of this bolt arrangement.

Here is a shot of the flooring on top of the joist. A heights are such that there is a nice flush finish to the frame elements.

A sample of the flooring and how it will end at the frame element.

The flooring is from a company called Megawood and it is a composite material containing 70% wood material. The client chose the wide boards with the wavy finish in a nice soft pre aged grey colour. This should look very nice once the frame element turns a more orange red rust colour.

Next step: installing the roof frame.