Stair runners


Senior Member
Salve a tutti,

qualcuno sa come si traduce stair runners?

Il contesto è il seguente:

Flooring including stairtreads shall include for fabrication and erection of stairtread support steel, all drilling, including drilling of main stair runners and/or stairtread support steel or welding of the stair tread to the main stair runners depending on the method dictated.

Grazie a tutti in anticipo,
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