[openrailwaymap] English word "Loading Gauge Profile Gate"?

Dear native English (BE) speakers,

how would you call this? https://commons.wikimedia.org/wiki/File:Lademass.jpg

I am currently translating the missings sections of the infrastructure JOSM preset into English. I find it difficult to translate the German word "Lademaßlehre". I only found the "Loading gauge profile gate" which describes the picture linked above. But googling this term returns only two results. That's why I suspect that it might be the invention of a German who searched an English term and did not find any.

They are currently tagged as railway=loading_gauge on nodes.

Best regards

Michael