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Halfen HDB-Z
Refer to the reinforcement plan for the
installation position for each element.
When placing the first row of HDB-Z elements,
the leading edge of the head bolt must be
aligned with the mark position for the column
edge.
The second row must be placed with a
spacing of 0.5 × d. As a rough guidance, the
bent bar of the second elements can be pushed
against the T-bar before precise placement.
Order of installation
1. Attach the spacers to the HDB-Z Elements
2. Install the bottom reinforcement layer — do not wire-tie!
3. Place the cross-layer of the bottom reinforcement loosely onto the first layer!
4. Install the HDB-Z Elements according to the reinforcement plan and the installation instructions.
5. Wire-tie the HDB-Z Elements and the previously installed reinforcement layers.
Finally, the remaining main longitudinal reinforcement is installed (upper reinforcement layer).
As before, ensure enough spacings to allow for installing and concreting to avoid conflict with
the main longitudinal reinforcement, and to ensure the concrete is properly compacted.
Correct position of the HDB-Z Elements
© 2024 · INST_HDB-Z 09/22 · www.leviat.com
Column
Incorrect — elements too high
Assembly Instructions
0.3d
0.5d
c
nom,o
c
nom,u
Place the HDB-Z Elements onto the
markings (check the spacers are correctly
placed), if necessary rearrange the
longitudinal reinforcement. Make sure that
the bottom bends of the HDB-Z are level
with the lowermost reinforcement bars.
Note: it may be necessary to adjust the
spacing between the longitudinal
reinforcement bars when placing the HDB-Z
Elements. This must be agreed with the
static engineer. The postions of the
elements and the concrete cover are as
specified in the planning documents.
We recommend using the supplied concrete
spacers. We advise against using reinforce-
ment mesh in the punching shear zone.
Do not install the HDB-Z
Elements on top of the
reinforcement bars.
The T-bar should always be perpendicular,
and the clamping plate should always be
horizontal. Make sure the main
reinforcement can be passed over and
across the lower bend of the HDB-Z
Element on-site.
Incorrect — elements too low
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