Frame for a reciprocating sieve

A reciprocating sieve frame (118, 122) for an agricultural combine, wherein the agricultural combine has a direction of travel (V) through the field harvesting crops, the reciprocating sieve frame (118, 122) comprising:

• a first member (300, 302, 308, 310) that is elongate and has a first end and a second end, wherein the first member extends generally horizontally and in the direction of travel;
• a second member (300, 302, 308, 310) that is elongate and has a first end and a second end, wherein the second member extends generally horizontally and in the direction of travel, wherein the second member is spaced away from the first member a first distance, and wherein the second member is disposed generally parallel to the first member;
• a first cross member (304, 306, 312, 314) that is elongate and has a first end and a second end, wherein the first cross member extends longitudinally in a direction that is perpendicular to the direction of travel, wherein said first end of said first cross member is fixed with respect to the first member, wherein said second end of said first cross member is fixed with respect to the second member;
• and
• a second cross member (304, 306, 312, 314) that is elongate and has a first end and a second end, wherein the second cross member extends longitudinally in a direction that is perpendicular to the direction of travel, wherein said first end of said second cross member is fixed with respect to the first member, wherein said second end of said second cross member is fixed with respect to the second member;
• wherein the first member is an extrusion, and wherein the second member is an extrusion.