MACV
REGISTERED
These are prestressed "hollow core precast concrete" panels formed by an extrusion process with edges shaped to form a recessed "keyway" for field grouting. I've used them in parking garages. I only saw them used in a house in a side-by-side duplex in France where you could stand in the garage at one end and hear someone speaking in the garage at the other end as if they were standing next to you.
They're formed, cables pre-tensioned and poured in very long beds and then a giant extruding machine runs along them forming cores in the concrete with pontoon-like tubes on fins. When they've cured they're cut to the required lengths.
Here's a video, hope it works.
If not, you can google to find one.
Any residential structural element not addressed by the IRC is required to be designed by a licensed design professional. Normally that's an engineer.
These slabs are inexpensive compared to poured in place concrete that requires forming and shoring in the field.
All field penetrations must be evaluated by the manufacturer and the engineer. In general it's good to locate them at the panel joints and/or align them parallel to the span.
They're formed, cables pre-tensioned and poured in very long beds and then a giant extruding machine runs along them forming cores in the concrete with pontoon-like tubes on fins. When they've cured they're cut to the required lengths.
Here's a video, hope it works.
Any residential structural element not addressed by the IRC is required to be designed by a licensed design professional. Normally that's an engineer.
These slabs are inexpensive compared to poured in place concrete that requires forming and shoring in the field.
All field penetrations must be evaluated by the manufacturer and the engineer. In general it's good to locate them at the panel joints and/or align them parallel to the span.
