Section Drawing

On the floor plan drawing above at the upper and lower left there are two a s surrounded by circular icons with an arrow.
Section drawing. Section drawings are a specific type of drawing architects use to illustrate a building or portion of a building. For buildings this can be useful as it gives a view through the spaces and surrounding structures typically across a vertical plane that can reveal the relationships between the different parts of the buildings that might not be apparent on plan drawings. This is as if you cut through a space vertically and stood directly in front looking straight at it.
To create a cross section first draw a line on your floor plan that cuts through a section of the house for which you need to show cross section detail. A section view is a view used on a drawing to show an area or hidden part of an object by cutting away or removing some of that object. A section is drawn from a vertical plane slicing through a building.
A section drawing section or sectional drawing shows a view of a structure as though it had been sliced in half or cut along another imaginary plane. The cut line is called a cutting plane and can be done in several ways. A section drawing is one that shows a vertical cut transecting typically along a primary axis an object or building.
The section reveals simultaneously its interior and exterior profiles the interior space and the material membrane or wall that separates interior from exterior providing a view of the object that is not usually seen.