18″ Gutter Pan

A technical diagram of an 18-inch gutter pan, showing a cross-section with dimensions and construction details. The gutter pan is rectangular with a slightly sloped surface. Overall gutter pan width is 18″ with depth ranging from 9″ to 8 1/4″. Two #4 bars are located 3″ from bottom and 4″ from sides. On the right, text specifies the placement of a #4 bar with a minimum lap of 1 foot. Additional notes below outline the placement of expansion joints and dowel curb patches.