Additional subsequently implemented Slots in Load-Bearing Walls, DIN 1053-1, Table 10   (German Standard)



Horizontal Slots

Horizontal slots in load-bearing walls without new structural analysis are only allowed by DIN 1053-1 in the area of 400mm at the top and 400mm at the buttom. In the area between no horizontal slots are allowed. The slot depth is defined:


Maximum Slot Depth for horizontal Slots
wall depthwith no
length limitation
with length
limitation 1250mm
115mm or more0 !0 !
175mm or more0 !25mm
240mm or more15mm25mm
300mm or more20mm30mm
365mm or more20mm30mm




Vertical Slots

Vertical slots in load-bearing walls without new structural analysis are only allowed by DIN 1053-1 with a slot depth and width al follows:


Maximum Slot Depth and Width for vertical Slots
wall depthslot depthslot width
115mm or more10mm100mm
175mm or more30mm100mm
240mm or more30mm150mm
300mm or more30mm200mm
365mm or more30mm200mm


maximum allowed vertical slot in a load-bearing wall with a depth
of 240mm without new structural analysis