Radon venting concrete forms
View Patent ↗The present invention 10 discloses a concrete form system for building foundations wherein two substantially parallel form walls 12 are constructed using a plurality of retainer sections that can mechanically interlock end-to-end 42, 44 when the retainer sections 14, 16, 18, 20 incorporate a throughbore 22 or butt-up end to end when there is no throughbore. Additionally the present invention provides a separator bar and reinforcement posts whereby the separator bar 24 serves as base for the retainer sections and as spacer between stacked retainer sections 14, 16, 18, 20 which can in cross-section have a circular, oval or polygonal shape and in one additional element a ribbed exterior portion 46, 48 for added strength and a substantially hollow interior 22 that forms a corrugated conduit retainer 20 that is conducive to providing ventilation for effective and efficient radon remediation from the structure being constructed. The aforementioned corrugated retainer 20 uses a combination of straps 50 and spreaders 40 to maintain the two form retainer wall 12 in place prior to and during the pouring of the concrete 36.
1. A concrete form system which provides an integral venting system for removing unwanted gases from the foundation footing of a building, said system comprising:
a pair of conduit retainers for forming the footing of the building, said pair of conduit retainers being spaced apart to receive concrete there between, said concrete forming the footing of the foundation of the building, each of said conduit retainers being formed of a plurality of conduit sections, each conduit having opposed male and female ends joining adjacent conduit sections, each conduit section having a corrugated tubular wall with inner and outer surfaces, said outer surface of said corrugated tubular wall defining a periphery thereof, said inner surface defining a hollow cavity therein, said corrugated tubular wall having a plurality of recessed sections positioned between raised sections;
at least one spreader bar rigidly connecting said pair of conduit retainers and holding apart said pair of conduit retainers when concrete is placed there between, each of said at least one spreader bar having a linear center section and two opposed u-shaped end sections, each of said u-shaped end sections receiving the recessed section of a respective one of said pair of conduit retainers, the center section of each of said at least one spreader bar being positioned below a top surface of its respective recessed sections;
at least one strap extending around said pair of conduit retainers holding said pair of conduit retainers in position when concrete is placed there between; and
at least one air vent disposed in a top surface of each of said pair of conduit retainers to permit air to be vented from each hollow cavity to the atmosphere.
2. The concrete form system of claim 1 , further comprising system at least one cross-vent extending between said pair of conduit retainers and in communication with the hollow cavity of each conduit retainer allowing air to be drawn between said pair of conduit retainers.
3. The concrete form system of claim 2 , wherein each of said at least one cross-vent has opposed ends, each end being connected to an inner sidewall of its respective conduit retainer above a midline thereof.
4. The concrete form system of claim 2 , wherein each of said at least one cross-vent is connected to an inner sidewall of each of said pair of conduit retainers closer to the top surface than a bottom surface.
5. The concrete form system of claim 2 , wherein said at least one strap comprises a flexible material.
6. The concrete form system of claim 2 , wherein said at least one spreader bar comprises a metal rod.