Why does Plastruct think that HO scale means 1:100 (they get the O scale more or less right at 1:48)?
I think they just reposition the architectural model items they sell as ‘scale models’ in order to increase their market (and it probably works). We used to have a Pearl Paint near here, and they would stock all sorts of Plastruct items like figures, trees, vehicles etc - none were particularly detailed, but were close enough to the standard modeling scales that I guess they figured they could get away with it. Maybe they would work if you are trying forced perspective on your layout, or if you are a ruthless billionaire showing off a model your planned new city on the ashes of the South Bronx (“Even though you are in Italy, Leave the Bronx!”)
If you’re using the structural shapes, it doesn’t matter as you can converthe decimal or fraction to HO to see what is scales out to. If its like the corrugated siding, not sure that matters either since it came in so many prototype sizes.
I’m building an HO scale grain elevator, the loading shed is made with HO (1/100) for the roof and N scale for the sides.
Ricky