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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.
If larger penetrations are required trimmer beams may be used, for further information, see Trimmer Beams.
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.
Images below are isometric drawings regarding notch dimensions.
Please note that this is only a guide, for clarification please contact us.