The top rail is a “Bread Loaf” shape 3” wide and 3.5” wide and 3.5” tall. Bottom rail measures 2” wide by 3.5” tall. Spans greater than 7 feet require an insert for maximum support. Rail will span 10 feet without a support post. The bottom rail is designed to sit 2” off the floor. The railing is available in 36” for residential and 42” rail for commercial (top rail height above grade). Choose from 2 baluster styles (square or colonial). Baluster spacing is custom routed on each panel to meet building code specifications.