+ Punching Shear Reinforcement

The efficient solution for increasing the punching shear resistance of reinforced concrete slabs

Punching shear elements DE increase the punching shear resistance of slabs supported directly by columns. If higher punching shear resistance is required, the punching shear elements DE are combined with double-headed studs DKD.

Punching shear reinforcement DE+DKD

Benefits

  • Easy installation without time-consuming inserting
  • Dual function as punching shear reinforcement and spacer
  • Common element heights readily available in stock
  • Certificates and registration in Austria and the Czech Republic
  • Design is based on EN 1992-1-1
  • Increase of the punching shear resistance of slabs
  • For slab heights from 200 to 450 mm
  • Increase of punching shear resistance up to 1.96·VRd,c
  • ALLPLAN and Revit elements for simple and efficient planning

Punching shear reinforcement DE+DKD

Application

Punching shear reinforcement DE+DKD

Composition

Punching shear reinforcement DE+DKD

Types

Punching shear elements DE come in heights from 100 to 320 mm. They can be used to increase the bearing capacity of reinforced concrete members with an overall depth of 200 to 450 mm.

Type Height Chords Vertical Bars Elements
hDE Ø Ø Distance Leg Length l Weight
mm mm mm mm mm kg
DE 100 100 6,0 6,0 50 600 1,60
DE 120 120 6,0 6,0 50 600 1,71
DE 140 140 6,0 6,0 50 600 1,81
DE 160 160 6,0 6,0 50 700 2,24
DE 180 180 6,0 6,0 50 700 2,36
DE 200 200 6,0 6,0 50 700 2,49
DE 220 220 6,0 6,0 50 850 3,17
DE 240 240 6,0 6,0 50 850 3,32
DE 260 260 6,0 6,0 50 850 3,47
DE 280 280 6,0 6,0 50 1000 4,26
DE 300 300 6,0 6,0 50 1000 4,44
DE 320 320 6,0 6,0 50 1000 4,62

Weight and dimensional tolerances as per ÖNORM B 4707

 

Double-headed studs DKD come in heights from 140 to 360 mm. Like punching shear elements DE, they can be used to increase the bearing capacity of reinforced concrete members with an overall depth of 200 to 450 mm.

Type Height Flat bar Double-headed Stud Pair
h DKD l Shaft Ø Head Ø Distance e DKD
mm mm mm mm mm
DKD – P 140 140 165 10 30 105
DKD – P 160 160 180 10 30 120
DKD – P 180 180 195 10 30 135
DKD – P 200 200 210 10 30 150
DKD – P 220 220 225 10 30 165
DKD – P 240 240 240 10 30 180
DKD – P 260 260 255 10 30 195
DKD – P 280 280 270 10 30 210
DKD – P 300 300 285 10 30 225
DKD – P 320 320 300 10 30 240
DKD – P 340 340 315 10 30 255
DKD – P 360 360 330 10 30 270

Weight and dimensional tolerances as per ÖNORM B 4707

Punching shear reinforcement DE+DKD

Installation / Placement

Punching shear elements DE are placed between the lower and upper layers of flexural reinforcement and thus, they also serve as spacers. Usually, at least eight elements each with an opening angle of 22.5° are placed in the column head area in a rotationally symmetrical arrangement. The type of punching shear element DE depends on the slab thickness.

Punching shear resistance of DE with K ≤ 1.65

Punching shear resistance of DE+DKD with 1.65 < K ≤ 1.96

Punching shear reinforcement DE+DKD

Gallery

Punching Shear Reinforcement DE+DKD

Downloads

Date issue 03/23

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