On Fri, 20 Dec 2019 05:25:54 -0800 (PST), Sonny
wrote:

On Thursday, December 19, 2019 at 8:02:09 PM UTC-6, DerbyDad03 wrote:
https://i.imgur.com/SqEXbcL.jpg

At every curve, and I mean every one, the boards were tapered to fit, sometimes
just a few, sometimes a dozen or more.

For any reasonable contractor, setting up shop in the field is common place, easy enough with portable generators.

For a known trapezoid dimension, the tapered floor boards can easily be fabricated in the shop. Should the installation of the posts in the field be off a bit, then only one or two boards need be modified, again, not too difficult. A crew who knows what they're doing, similarly as an efficient crew of roofers, can easily accomplish the task.


In addition, at each double post, the floorboards are notched to fit tightly
around the uprights. This notches are cut at all different angles, whatever
it took to get them tight around the posts.

Again, doing this in the field is not difficult with a circ saw and/or hand saw.

The hardest part of the job might be carrying the boards the half mile distance.

Sonny
The boardwalk at the Oliphant Fels on the lower Bruce is similar,
although not quite as well done. I believe it was all done on-site by
volunteers. All done in PT lumber and the edges not rounded over.