The whole scene has to be built from the back to the front. The first thing I need is the presentation base. Beause of its size it is made of two big plates. They are interconnected by pins and notches. Both are constructed the same way:
These are the pins. Then come the notches:
Since the pins are supposed to be pushed into the notches the notches are slighty bigger. 1mm higher and 1mm wider sufficed.
Now the plates are marked with cutting points:
The marked areas are cut out:
The notches will be pushed through the holes and glued tight.
To make sure that the positions of the pins and notches matched I used the notch holes as templates for the pin holes.
The holes were traced onto the corresponding plate
and cut out. Notches and pins are pushed through the holes and attached:
Here you can see the idea. This construction should be strong enough to avoid any sagging later, especially when the house is glued into place which will add even more stability.
Then the two parts of each plate are glued together to form one BIG 90 x 74 cm piece of card.
This is the biggest piece of card I have ever worked with.