Modular edge form system for cast in place suspended concrete slabs

Abstract

A modular edge form system for cast in place suspended concrete slabs, comprising wood or metal edge forms that close gaps between joists when a row of joists is above vertical supporting structures. The edge forms may depend on joists directly, or by means of wood edge form support structures; the joists in turn depend on joist hangers. Areas in front of the butt ends of joists are covered by means comprising the use of notch cover plates and/or bendable notch cover rectangles. The edge form system contains and supports cast-in-place horizontal concrete structures when they are poured and while they cure.

1 . A modular edge form system for cast in place suspended concrete slabs, comprising:
 a. metal edge forms, having a front face, a top flange which depends on a joist, one or more notches and/or side half notches sized to the outer width of a joist hanger, one or more upper notch covers and/or half notch covers, and one or more bottom reinforcing flange sections between the notches, and   b. a series of sized notch cover plates having faces wider than the metal edge form notches and/or adjoining half-notches, and having a range of heights such that the height increments are equal to or less than the height of the said upper notch covers and/or half notch covers of the said metal edge forms, and having tongues that are inserted between the butt end of a joist and the inner central wall of a joist hanger depending on a vertically supporting structure, such that the sized notch cover plates hold the said metal edge forms against the edge of the said vertically supporting structure, and   c. top sheathing placed on top of the joists and on the metal edge form top flanges, and dimensioned such that the edge of the sheathing aligns with the front face of the metal edge forms.   
     
     
         2 . The modular edge form system of  claim 1  further comprising front faces of the said metal edge form that are vertical. 
     
     
         3 . The modular edge form system of  claim 1  further comprising bottom reinforcing flanges of the said metal edge form that further comprise a reinforcing fold. 
     
     
         4 . The modular edge form system of  claim 1  further comprising a nailing hole in the said metal edge form top flange. 
     
     
         5 . The modular edge form system of  claim 1  further comprising a said joist hanger that is adjustable. 
     
     
         6 . The modular edge form system of  claim 1  further comprising a wedge shim having a series of horizontal slits symmetrically on each side of a central vertical axis, the depth of these horizontal slits being dimensioned with respect to the varying thickness of the wedge. 
     
     
         7 . A modular edge form system for cast in place suspended concrete slabs, comprising:
 a. wood edge forms, comprising a front face and upper support structures on each side, and   b. top wood edge form support structures, comprising a front face, and further comprising wood edge form upper support housings on each side which engage with and support the wood edge form upper support structures, and further comprising a top plate which depends on a joist, and   c. the joist depending on a joist hanger, the said joist hanger in turn depending on a vertically supporting structure, and   d. top sheathing placed on top of the joists and on the wood edge forms, and dimensioned such that the edge of the sheathing aligns with the front face of the wood edge forms.   
     
     
         8 . The modular edge form system of  claim 7 , further comprising one or a series of sized notch cover plates, the said notch cover plates further comprising a central lower tongue, and further comprising faces that are sized to the outer width of the said joist hangers, recessed outer flanges sized to hold the said wood edge forms against the edge of the said vertically supporting structure, and, for a series of the said sized notch cover plates, front face height increments that are less than the height of the front face of the said top wood edge form support structures. 
     
     
         9 . The modular edge form system of  claim 7 , further comprising a said top wood edge form support top plate having a nailing hole. 
     
     
         10 . The modular edge form system of  claim 7 , further comprising a said top wood edge form support top plate having a recessed front face central tongue sized to be inserted within a said joist hanger, and further comprising, between the said central tongue and the said upper support housing front faces, gaps sized to the width of the outer sides of the said joist hanger. 
     
     
         11 . The modular edge form system of  claim 7 , further comprising a said top wood edge form support top plate having a continuous rectangular front face comprising the said upper support housings. 
     
     
         12 . The modular edge form system of  claim 7 , further comprising a said top wood edge form support having lower angled support side plates perpendicular to edge of the vertical support structure, and having lower front edges that are aligned with the plane of a rear inner wall of the said upper support housings. 
     
     
         13 . The modular edge form system of  claim 7  further comprising front faces of the said wood edge form that are vertical. 
     
     
         14 . The modular edge form system of  claim 7  further comprising a said joist hanger that is adjustable. 
     
     
         15 . The modular edge form system of  claim 7  further comprising a wedge shim having a series of horizontal slits symmetrically on each side of a central vertical axis, the depth of these horizontal slits being dimensioned with respect to the varying thickness of the wedge. 
     
     
         16 . The modular edge form system of  claim 7  further comprising a bendable middle notch cover rectangle, having a lower tongue section.