Z-shaped frame members, floor frames, and floors incorporating the same

A floor frame comprising:

• a first unitary Z-shaped member having a first web, an upper first flange extending in a first direction from the first web, a lower second flange extending from the first web in a second direction opposite the first direction, and a plurality of spaced apart first tabs punched from the first web and extending in the second direction;
• a second unitary Z-shaped member opposite the first Z-shaped member having a second web, an upper third flange extending in the second direction from the second web, a lower fourth flange extending from the second web in the first direction, and a plurality of spaced apart second tabs punched out from the second web and extending in the first direction;
• a first end member connected to the first and second unitary Z-shaped members and extending between the first and second unitary Z-shaped members, said first end member having a third web and an upper fifth flange extending transversely from the third web in a third direction;
• a second end member connected to the first and second unitary Z-shaped members and extending between the first and second unitary Z-shaped members, said second end member having a fourth web and an upper sixth flange extending transversely from the fourth web in a fourth direction opposite the third direction, wherein said second end member is opposite the first end member, wherein the first and second unitary Z-shaped members and the first and second end members define a periphery of the floor frame;
• and
• a plurality of intermediate members, wherein each of said plurality of intermediate members comprises a fifth web, an upper seventh flange extending transversely from the fifth web, wherein each of the plurality of intermediate member fifth webs is connected to a first tab of said plurality of first tabs and to a second tab of said plurality of second tabs.