Roof or wall structure

摘要

The roof or wall structure has a main rod (20) extended in an extending direction (2). A mounting unit has two supporting rods (28,34) extended in the extending direction with mutually facing support surfaces (28a,34a) to both sides of a fixing area (36). A holder is arranged partially in the fixing area by the supporting surfaces. The holder is fixed transversely to the extending direction on the main rod.