Spreader assembly

A material spreading apparatus for mounting in a cargo bay of a truck, said apparatus comprising:

• a molded hopper having a front end and a back end, said hopper having longitudinally extending inner sides that slope downwardly toward a longitudinally extending opening in the bottom of said hopper and longitudinally extending outer sides that slope downwardly toward the bottom of said hopper, said hopper further comprising downwardly extending, columnar, and hollow leg portions for removably supporting said hopper on a bed of the cargo bay such that the opening will be disposed above the bed of the cargo bay, said leg portions being longitudinally spaced apart along respective outer sides of the hopper and being unitary with respective outer sides of said hopper;
• an elongated conveyor device extending along said bottom of said hopper beneath said opening for conveying particulates from said opening toward said back end of said hopper;
• a spinner assembly attached to said hopper at said back end disposed to receive particulates from said hopper for throwing the particulates over a distribution area;
• wherein said hopper is molded from a polymer material and has an inner wall spaced from an outer wall to form a double-walled unitary structure, the inner wall forming said inner sides and said outer wall forming said outer sides and hollow leg portions, and wherein the hollow legs protrude laterally outwardly from the outer sides.