A Lindsay Lampasona crew uses a Somero Power Rake to verify subgrade tolerance before striking off a 20,000-square-foot floor at a Walmart in North Smithfield, R.I.

If we are pouring a new concrete floor we will use these scoring lines as color dividers, or as a method to define the space. The scoring also allows you the option of creating a pattern.

Video summary Becci Sharkey shows you how to draw a 3D room plan and an overhead floor plan, using the example of a bedroom with simple furniture. She explains that when drawing a 3D room, the ...