Threshing beds and concave for an agricultural combine formed therewith

A concave for an agricultural combine, comprising:

• a base frame with an upstream end, a downstream end, and threshing beds adjacent to one another on the base frame between the upstream end and the downstream end and forming openings therebetween for grain to pass through, each said threshing bed extending across one of the openings for separating grain from threshed crop material and comprising:
• a unitary member with an upper surface, a lower surface, a first end, a second end, a first part, a second part, a first grate opening, a second grate opening, and a severed bar;
• the first part and the second part each extending from the first end to the second end, the first end and the second end each connecting the first part to the second part;
• the first grate opening and the second grate opening between the first part and the second part and between the first end and the second end, the first grate opening and the second grate opening for grain to pass through;
• and
• the severed bar between the first grate opening and the second grate opening, the severed bar including a first bar segment having a first free end and a second bar segment having a second free end, the first bar segment and the second bar segment extend inward toward each other from the first part and the second part, respectively, to the first free end and the second free end, respectively, on either side of a gap formed by and between the first free end and the second free end, the gap severing the first bar segment from the second bar segment and extending from the first grate opening to the second grate opening.