I tried using the Gargraves SS track out of doors, many years ago. I would NOT recommend it for out-of-doors.
The stuff I used had Basswood ties, and I tried just about every preservative available, but none helped to preserve them for more than a year or two. The ties were also too short to look good in LS. I think they might have produced some with plastic ties, but those were too short also. The rail is hollow like Lionel rail, and could be called “Code 250”.
It is a challenge to use any other track with the Gargraves track, as it takes a lot of effort to make up compensation rails for connecting. Their method of connecting is with brass pins. Bending the Gargraves track is NOT as easily done as they suggest, but some people seem to master the challenge.
If anyone wants track for indoor use, as a display track, it can be used successfully.
Way back when…I contacted Gargraves, and asked if they would produce their track with a better wooden tie. They told me then, that they were set up for only one length of tie, and their tools would “Gum-up” cutting other types of wood. They used their one length of ties for all the track they made, “O”, and “LS”…and like I suggested above; they do produce their “O Gauge” track with plastic ties now…or at least they did a few years ago, but I’m not sure that they did, or not produce it on plastic ties in “LS”. …and I’m not sure the plastic ties were/are UV protected.
As was suggested by another poster…the rail will not stand up to the reality of life in the great out-of-doors, so I suggest that it is NOT worth any saving, that anyone might have hoped for.
Fred Mills