Penetrations and Floor Voids

Penetrations and floor voids can be designed for and incorporated within the Hollow Core slabs.

Larger mechanical duct penetrations can be provided for within the slabs as they are delivered to site.
Smaller service pipe penetrations are generally located and made after the slabs are in place by following trades
If larger penetrations are required trimmer beams may be used, for further information, see Trimmer Beams .

Click on a the images below to see isometric drawings regarding notch dimensions.
Please note that this is only a guide, for clarification please contact us

 
200mm thick 6 core slab 220mm thick 5 core slab 300mm thick 4 core slab  
 
The penetration widths depend on the position of the penetrations.
In addition the size and penetration depends on the load and span and could be smaller, or larger than specified.
Please contact us for further information