3 sections 6ft x 5ft with a corridor box's 2 ft deep placed on the back wall this will give you 3 ft from the corridor partition to the front of the box's, 12 boxes in each section this will give you room to race 12 widowhood cocks in one section 12 widowhood hens in the other, just pair then hens you have with the cocks then split and race both sex's,. the young bird loft 12 boxes split in half will give you room for 24 youngbirds which is plenty mate, quality not quantity comes to mind, jmo