PENETRATIONS                 Slab Penetration A penetration such as this needs to be arranged well before building construction starts - as you can see in the example, it is incorporated into the concrete slab during construction. (please click on the image)     A slab penetration with ducts In this example, ducting is dropped through the slab penetration to the lower floor level. A penetration such as this needs to be arranged well before building construction starts. (please click on the image) back to products page