Roof Side 1/Jamp sill (inferior purlin)
Here you can specify the parameters for the bottom of roof with regard to structural aspects. The exact height of the eaves purlin can specified, taking into account, for example, the thickness of the brickwork. In addition, it can be positioned at an exact distance from the outside edge of the brickwork, in order to guarantee a reasonable static load. The ‘Pointing sill’ is measured from the top outside edge of the eaves purlin to the top edge of the rafter and at right angles to the slope of the roof.