Ceiling detail, Rockford Shults Corn Crib, Head of Webb Creek, under Snag Mountain, TennesseeGreat Smoky Mountains National ParkCeiling detail... NOTE the round pole joists and the loft flooring. The loft flooring is of rived oak boards 5-1/4 to 8-1/4 wide, 1/4 to 3/4 thick, and 6' long. Due to the uneven edges of the boards when they are rived, the joints are lapped as when laying weather boarding Rockford Shults Corn Crib I-5, Head of Webb Creek, under Snag Mountain III-B-10672, History - Buildings