Flooring system

Claim 2

A flooring system comprising a plurality of parallel load-bearing spaced joists supporting a plurality of load-bearing flooring members which extend substantially at right angles to the joists, each said flooring member having a web and a pair of flanges projecting downwardly from the web and being angled toward one another thereby to define a substantially channel-shaped cross-section, each said joist being generally in the form of a hollow section of substantially truncated isosceles triangular shape with a height-to-base ratio in the range of from 2:1 to 3:1 and having a plurality of pairs of spaced slots extending downwardly from an upper surface thereof and each said pair of slots being disposed to receive said flanges of a flooring member carried by the joist but said slots having a length which is less than the depth of said flanges as measured from said web of the channel-shaped section to the free edges of said flanges, and said flanges being provided with spaced slots appropriately positioned for receiving parts of the joists in the region of an intersection between a joist and a flooring member, whereby a plurality of joists may be interengaged with a plurality of flooring members, and with said web of each flooring member resting on said upper surfaces of the associated joists.

Claim 3

A flooring system as claimed in claim 1, in which said webs of at least some of said channel-shaped flooring members are provided with a plurality of perforations whereby the assembled floor is ventilated.

Claim 4

A flooring system as claimed in claim 1 or claim 2, in which said pairs of spaced slots in said joists are appropriately positioned to give gaps between adjacent flooring members when said flooring members are assembled with said joists.

Claim 5

A flooring system as claimed in claim 1, in which said flooring members and said joists are manufactured from a plastics material.

Claim 6

A flooring system as claimed in claim 1, in which each slot of a pair thereof in a joist has such a width that a flange of a flooring member is a sliding fit therewithin, whereby a flooring member engaged therewith is held against substantial movement in directions other than parallel to the length of the flooring member.

Claim 7

A flooring system as claimed in claim 1, in which apexes of said triangular cross-sectional joists are uppermost and said webs of said flooring members bear on said apexes.

Claim 8

A flooring system as claimed in claim 6, in which the upper portion of each said triangular cross-sectional joist is truncated to provide a flat surface on which said flooring member webs may bear.

Claim 9

A flooring system comprising a plurality of parallel load-bearing spaced joists made of a plastics material and supporting a plurality of load-bearing flooring members also made of a plastics material and which extend substantially at right angles to the joists, each said flooring member having a web provided with perforations along the length thereof and a pair of flanges projecting downwardly from said perforated web and being angled toward one another thereby to define a substantially channel-shaped cross-section, each said joists being generally in the form of a hollow section of substantially truncated isosceles triangular shape, with a height-to-base ratio in the range of from 2:1 to 3:1 and having a plurality of pairs of spaced slots extending downwardly from an upper surface thereof and each said pair of slots being disposed to receive said flanges of a flooring member carried by the joist but said slots having a length which is less than the depths of said flanges as measured from said web of the channel-shaped section to the free edges of said flanges, the spacing of the pairs of said slots being greater than the width of said flooring members whereby there are gaps between adjacent assembled flooring members, and said flanges of said flooring members being provided with spaced slots appropriately positioned for receiving parts of said joists in the region of an intersection between a joist and a flooring member, whereby a plurality of flooring members may be interengaged with a plurality of joists with said web of each flooring member resting on said upper surfaces of the associated joists.

Claim 10

A flooring system comprising a plurality of parallel load-bearing spaced joists made of a plastics material and supporting a plurality of load-bearing flooring members also made of a plastics material and which extend substantially at right angles to the joists, each said flooring member having a web provided with perforations along the length thereof and a pair of flanges projecting downwardly from said perforated web and being angled toward one another thereby to define a substantially channel-shaped cross-section, each said joists being generally in the form of a hollow section of substantially truncated isosceles triangular shape, with a height-to-base ratio in the range of from 2:1 to 3:1 and having a plurality of pairs of spaced slots extending downwardly from an upper surface thereof and each said pair of slots being disposed to receive said flanges of a flooring member carried by the joist but said slots having a length which is less than the depths of said flanges as measured from said web of the channel-shaped section to the free edges of said flanges, the spacing of the pairs of said slots being greater than the width of said flooring members whereby there are gaps between adjacent assembled flooring members, and said flanges of said flooring members being provided with spaced slots appropriately positioned for receiving parts of said joists in the region of an intersection between a joist and a flooring member, whereby a plurality of flooring members may be interengaged with a plurality of joists with said web of each flooring member resting on said upper surfaces of the associated joists.

Claim 11

A flooring system comprising a plurality of parallel load-bearing spaced plastics material joists supporting a plurality of load-bearing plastics material flooring members which extend substantially at right angles to the joists, each said flooring member having a flat web and a pair of flanges projecting downwardly from the web and being angled towards one another thereby to define a substantially channel-shaped cross-section, each said joist having a plurality of pairs of spaced slots having a width substantially the same as a width of said flanges and extending downwardly from an upper surface thereof and each said pair of slots being disposed to receive said flanges of a flooring member carried by the joist but said slots having a length which is less than the depth of said flanges as measured from said web of the channel-shaped section to the free edges of said flanges, and said flanges being provided with spaced slots appropriately positioned for receiving parts of the joists in the region of an intersection between a joist and a flooring member, whereby a plurality of joists may be interengaged with a plurality of flooring members, and with said web of each flooring member resting on said upper surfaces of the associated joists, said joists being substantially triangular in cross-sectional shape and adapted for assembly with said flooring members such that the apexes of said triangular cross-sectional joists are uppermost and said webs of said flooring members bear on said apexes.

Claim 12

A flooring system comprising a plurality of parallel load-bearing spaced plastics material joists supporting a plurality of load-bearing plastics material flooring members which extend substantially at right angles to the joists, each said flooring member having a flat web and a pair of flanges projecting downwardly from the web and being angled towards one another thereby to define a substantially channel-shaped cross-section, each said joist having a plurality of pairs of spaced slots having a width substantially the same as a width of said flanges and extending downwardly from an upper surface thereof and each said pair of slots being disposed to receive said flanges of a flooring member carried by the joist but said slots having a length which is less than the depth of said flanges as measured from said web of the channel-shaped section to the free edges of said flanges, and said flanges being provided with spaced slots appropriately positioned for receiving parts of the joists in the region of an intersection between a joist and a flooring member, whereby a plurality of joists may be interengaged with a plurality of flooring members, and with said web of each flooring member resting on said upper surfaces of the associated joists, said joists being substantially triangular in cross-sectional shape and adapted for assembly with said flooring members such that the apexes of said triangular cross-sectional joists are uppermost and said webs of said flooring members bear on said apexes.

Claim 13

A flooring system as claimed in claim 9, in which the upper portion of each said triangular cross-sectional joist is truncated thereby to provide a flat surface on which said flooring member webs may bear.

Claim 14

A flooring system as claimed in claim 10, in which each said joist is generally in the form of a hollow section of essentially isosceles triangular shape, with a height-to-base ratio (after truncation) in the range of from 2:1 to 3:1.