After weeks of ground preparation, the frame of the house has started going up. The photo shows the I-beams forming the frame of the ground floor. One side of the I-beam rests on the concrete foundation and then cantilevers over the insulating polystyrene which surrounds the concrete. Stacked up on the concrete floor is the rest of the house in kit-form. The I_beams have also been used horizontally to produce the base for Mike’s study which is cantilevered off some concrete piles. It is covered in plastic in the previous photo.And so what is an I-beam. It is a mixture of OSB board and wood in an I-shape. Here is a close-up of one.