I worked all weekend (well spare time weekend) on my lumber load for a 40' flatcar. only the top layer of the load is full length boards. the rest of the stack is hollow with only the ends represented. even still it took about 10 2' long basswood strips to do the whole load. I still have to add the banding on the top of the stakes. I think thread will do the job to represent it. maybe I went a little to high?