From "Train Shed Cyclopedia No. 5" (1940 Car Builders' Cyclopedia):
"Flooring 2 3/4" x 4 15/16" Ship Lap 1/2" Carriage Bolts"
The car was 70 ton 50'-6" Pere Marquette. Likely car number was 18400
There's an interesting ATSF composite gon with a two-layer floor. The lower layer is transverse shiplap 2 1/4" thick by approx 7 1/8". The upper layer is longitudinal 1 1/4" thick by approx 6 1/8" planking. The car was for sulfur service. There's a photo of a T&NO car (43015) that is suspiciously similar to the drawing.
Lastly, there's a Milwaukee composite gon with drop doors. Likely car number 80309. Flooring was 2 1/4" x 5 1/8" transverse tongue and groove.
And many steel floored gons.
Ed
Edward Sutorik
