Preformed shapes are not necessary with Reliable Void Forms (RVF). RVF can be cut to fit without losing the strength or moisture resistance. You can cut a hole in the middle, remove a corner, or cut a shape to fit around a pipe or pier without worry. Construction foam is also a good way to fill small gaps if you prefer not to cut forms. mattis, pulvinar dapibus leo.
2. Seems that the subcontractor will need to be very good at a tight fit for the mdf boards and the HDPE retainers to make the system close up well. I would not think that taped joints on the vapor retarder would be the only protection from concrete entering the void.
Just like with carton forms, a good vapor barrier with taped joints is all that is required. Some customers also chose to tape the hardboard panels.
3. The photos show separate beam and slab placements. Does this system work well when the beams and slab are cast monolithic?
Yes, this system works well when placed are ok to use: monolithic. It is not necessary but some customers have poured a thin mud seal over the covered Reliable Void Forms in the beams for protection and to form a soil retainer while they prep the slab and then place the foundation.
Reliable Void Forms are 24” x 24”, optimized for installer handling, shipping, storage and production cost. Since the RVF only weighs 3 lbs. each, installers can pick up several in a stack and drop them one at at time to E. The ground should support the form without sinking into the soil F. The forms should not be exposed to moisture for more than 48 hours G. If you have doubts, replace the forms quickly cover a large area.
No. Experienced users should be able to install RVF quicker than carton forms. Customers like that RVF can be torn or cut to shape still hold their strength. No more complicated puzzle layouts, no cutting and taping carton forms with partitions hoping they won’t fail.
Reliable Void Forms are stacked on 4×4 pallets, shrink wrapped for stability in transit and covered with a poly film pallet cover for job site storage protection. No costly storage trailers are in the way at the job and no back-haul charges for freight.
RVF can be stacked to achieve a deeper void. Place the first layer as normal. Stack the second layer upside down so the forms are face to face with good stability. Put cover board on the top only, not in between the stacked forms. Then cover with vapor barrier taped securely at all joints. We recommend you start at the perimeter so that you do not have cut forms on the edge. Then work around the piers so that any cut forms are in the middle, away from edges.
A. They should support someone walking on them without deflection. B. You should not be able to compress the form with your hand C. If a form weighs more than 4 pounds it should not be used D. RVF can be used on damp soil, but NOT standing water E. The ground should support the form without sinking into the soil F. The forms should not be exposed to moisture for more than 48 hours G. If you have doubts, replace the forms