Grain Bin Floor Panel

A method of forming a grain bin floor panel comprising:

• providing a unitary piece of sheet metal;
• passing the unitary piece of sheet metal through a roll former comprising a plurality of rollers arranged to progressively bend the sheet metal into a floor panel structure comprising:
• a central support leg extending in a longitudinal direction between opposing ends of the panel;
• a first side support leg and a second side support leg extending in the longitudinal direction and being spaced laterally outward from opposing sides of the central support leg;
• a first floor surface connected between the first side support leg and the central support leg and including ventilating perforations formed therein;
• and
• a second floor surface connected between the second side support leg and the central support leg and including ventilating perforations formed therein;
• the first floor surface, the second floor surface, the first side support leg, the second side support leg, and the central support leg being formed of a bent unitary piece of sheet metal;
• and
• the central support leg comprising:
• first and second upright portions connected to respective ones of the first floor surface and the second floor surface at respective upper ends of the upright portions and spaced apart from one another at respective lower ends of the upright portions;
• and
• a lower portion connected between respective lower ends of the first and second upright portions;
• forming the lower portion to be concave such that a central portion of the lower portion is raised upwardly in relation to the lower ends of the first and second upright portions at an intermediate stage of the roll former.