Foamed plastic concrete form with fire resistant tension member

Claim 2

A self-supporting concrete form of foamed polymeric material capable of containing liquid concrete without additional shoring, said polymeric material being of uniform low density throughout so as to be resiliently deformable, said form including two spaced longitudinal walls terminating adjacent two spaced transverse end walls, said end walls extending from one longitudinal wall to the other, at least one partition wall intermediate said end walls extending from one longitudinal wall to the other, at least one of said end walls and said partition wall having a tension member of fire resistant material integral therewith to provide a fire stop between said longitudinal walls, said partition wall and end walls defining holes extending through said form, each said hole being vertically disposed when said form is in use and tapering toward a smaller cross-section at its lower end, corresponding edges of said transverse walls and said partition wall being inwardly spaced from adjacent edges of said longitudinal walls so as to provide a longitudinal beam of concrete integral with a column of concrete in each said vertical hole when concrete is poured into a plurality of assembled forms and a recess in a lower edge of each longitudinal wall and a projection provided on an upper edge of each longitudinal wall so that projections and recesses of superimposed similar forms cooperate to position said forms, said polymeric material being deformable to provide a seal thereby minimizing seepage of concrete between forms.

Claim 3

A concrete form as claimed in claim 1 wherein the tension member is embedded in said end walls or partition wall.

Claim 4

A concrete form as claimed in claim 2 wherein each of said end walls and partition wall of said form comprises said tension member.

Claim 5

A concrete form as claimed in claim 3 wherein said transverse walls are inwardly curved so as to provide a longitudinal beam of at least partly curved cross-section.

Claim 6

A concrete form as claimed in claim 3 wherein said projection on the upper edge of each longitudinal wall is a tongue and said recess on a lower edge of each longitudinal wall is a groove adapted to receive a tongue of an adjacent similar form when said forms are superimposed.

Claim 7

A concrete form as claiMed in claim 5 wherein tongues are provided on the end edges of longitudinal walls and grooves are provided in end edges disposed on opposed end edges of the said longitudinal walls so that tongues and grooves of adjacent similar forms cooperate to position said forms and provide a substantially liquid tight joint when forms are placed in end abutting relationship.

Claim 8

A concrete form as claimed in claim 6 wherein said tension members comprise foraminous material and said longitudinal walls comprise integrally molded expanded beads of polystyrene.

Claim 9

A concrete form as claimed in claim 6 wherein said tension members comprise a mesh at least partly composed of synthetic plastic material.

Claim 10

A concrete form as claimed in claim 6 wherein at least one notch is provided in each tongue on the upper edges of the longitudinal walls to cooperate with mating raised portions in the grooves in the lower edges of longitudinal walls thereby assisting in the positioning of said form in horizontal rows.

Claim 11

In a wall structure, a plurality of molded form blocks of foamed synthetic plastic material having a substantially uniform low density, each said block having two spaced longitudinal walls terminating adjacent two transverse end walls extending from one longitudinal wall to the other, at least one partition wall intermediate said end walls extending from one longitudinal wall to the other, at least one of said end walls and said partition wall having a tension member of fire resistant material integral therewith to provide a fire stop between said longitudinal walls, said end walls and partition wall interconnecting said longitudinal walls to provide a sufficiently rigid structure for holding the liquid concrete and defining vertical holes extending through said form, each said hole tapering toward a smaller cross-section at its lower end, upper and lower edges of said transverse walls and said partition wall being inwardly spaced from adjacent edges of said longitudinal walls so as to provide a longitudinally extending beam of concrete integral with columns of concrete in said vertical holes and a projection being provided along an upper edge of each longitudinal wall and a recess being provided along a lower edge of each longitudinal wall so that projections and recesses of superimposed forms cooperate to position said forms, said projections being compressed in said recesses to minimize seepage of liquid concrete, similar projections being provided along end edges of longitudinal walls and recesses along opposed end edges of each said form whereby projections and recesses on the ends of adjacent similar forms cooperate to provide a substantially liquid-tight joint.

Claim 12

In a wall structure, a plurality of molded form blocks of foamed synthetic plastic material having a substantially uniform low density, each said block having two spaced longitudinal walls terminating adjacent two transverse end walls extending from one longitudinal wall to the other, at least one partition wall intermediate said end walls extending from one longitudinal wall to the other, at least one of said end walls and said partition wall having a tension member of fire resistant material integral therewith to provide a fire stop between said longitudinal walls, said end walls and partition wall interconnecting said longitudinal walls to provide a sufficiently rigid structure for holding the liquid concrete and defining vertical holes extending through said form, each said hole tapering toward a smaller cross-section at its lower end, upper and lower edges of said transverse walls and said partition wall being inwardly spaced from adjacent edges of said longitudinal walls so as to provide a longitudinally extending beam of concrete integral with columns of concrete in said vertical holes and a projection being provided along an upper edge of each longitudinal wall and a recess being provided along a lower edge of each longitudinal wall so that projections and recesses of superimposed forms cooperate to position said forms, said projections being compressed in said recesses to minimize seepage of liquid concrete, similar projections being provided along end edges of longitudinal walls and recesses along opposed end edges of each said form whereby projections and recesses on the ends of adjacent similar forms cooperate to provide a substantially liquid-tight joint.

Claim 13

A wall structure as claimed in claim 10 wherein the tension member is embedded in said end walls or partition wall.

Claim 14

A wall structure as claimed in claim 11 wherein each of said end walls and partition wall of said form comprises said tension member.

Claim 15

A wall structure as claimed in claim 12 wherein said transverse walls are inwardly curved so as to provide a longitudinal beam of at least partly curved cross-section.

Claim 16

A wall structure as claimed in cliam 12 wherein said projection on the upper edge of each longitudinal wall is a tongue and said recess on a lower edge of each longitudinal wall is a groove adapted to receive a tongue of an adjacent similar form when said forms are superimposed.

Claim 17

A wall structure as claimed in claim 14 wherein tongues are provided on the end edges of longitudinal walls and grooves are provided in end edges disposed on opposed end edges of the said longitudinal walls so that tongues and grooves of adjacent similar forms cooperate to position said forms and provide a substantially liquid tight joint when forms are placed in end abutting relationship.

Claim 18

A wall structure as claimed in claim 15 wherein said tension members comprise foraminous material and said longitudinal walls comprise integrally molded expanded beads of polystyrene.

Claim 19

A wall structure as claimed in claim 15 wherein said tension members comprise a mesh at least partly composed of synthetic plastic material.

Claim 20

A wall structure as claimed in claim 15 wherein at least one notch is provided in each tongue on the upper edges of the longitudinal walls to cooperate with mating raised portions in the grooves in the lower edges of longitudinal walls thereby assisting in the positioning of said form in horizontal rows.