Our PRO 150FC trench drains come with removable D and E load class ductile cast iron gratings and rebar installation brackets to simplify the installation process. The more linear feet that you order, the more that the price of the whole system will decrease. This system is fitted with a 1% internal slope built in. Channels are made of fiber concrete which has the ability to withstand extreme hot and cold temperatures, and a galvanized stamped steel edge is attached for the cast iron bolt down mechanism and for weight reinforcement. This system comes classified as either a D or E load class which means it can withstand loads up to and including 89,920 LBS and 134,800 LBS per foot respectively. All concrete systems include end caps for your project and the concrete rebar installation brackets.