Concrete voided floor panel

A flooring system comprising:

• a plurality of access panels;
• and
• a plurality of voided floor panels, each comprising:
• a pre-cast dome including:
• a flange portion;
• a first stem portion and a second stem portion, each of the first stem portion and the second stem portion arranged substantially orthogonal with respect to the flange portion;
• a plurality of joint portions, a first set of the plurality of joint portions disposed along an end of the first stem portion, a second set of the plurality of joint portions disposed along an end of the second stem portion, at least some of the first set and at least some of the second set including a plurality of rebar block-outs transversely oriented to a longitudinal span of the pre-cast dome;
• and
• a first ledge portion and a second ledge portion, the first ledge portion disposed between the flange portion and the first stem portion along the longitudinal span, the second ledge portion disposed between the flange portion and the second stem portion along the longitudinal span;
• a plurality of strands arranged with respect to the longitudinal span of the pre-cast dome;
• a plurality of reinforcing bars inserted through the plurality of rebar block-outs;
• and
• a slab;
• wherein the plurality of joint portions, the plurality of strands, and the plurality of reinforcing bars are cast within the slab;
• wherein the pre-cast dome and the slab form the void along the longitudinal span;
• wherein the plurality of voided floor panels are arranged to abut with adjacent voided floor panels;
• wherein the plurality of access panels are supported by the first ledge portion and the second ledge portions;
• wherein the plurality of access panels and the plurality of voided floor panels form a floor surface.

A method of forming a voided floor panel, comprising:

• casting a dome in a first formwork, the dome including:
• a flange portion;
• a first stem portion and a second stem portion, each of the first stem portion and the second stem portion arranged substantially orthogonal with respect to the flange portion;
• a plurality of joint portions, a first set of the plurality of joint portions disposed along an end of the first stem portion, a second set of the plurality of joint portions disposed along an end of the second stem portion, at least some of the first set and at least some of the second set including a plurality of rebar block-outs transversely oriented to a longitudinal span of the pre-cast dome;
• and
• a first ledge portion and a second ledge portion, the first ledge portion disposed between the flange portion and the first stem portion along the longitudinal span, the second ledge portion disposed between the flange portion and the second stem portion along the longitudinal span;
• tensioning a plurality of strands in a second formwork;
• lowering the dome into the second formwork, such that the plurality of strands are arranged with respect to the longitudinal span of the dome;
• inserting a plurality of reinforcing bars through the plurality of rebar block-outs;
• and
• casting a slab in the second formwork;
• wherein the plurality of joint portions, the plurality of strands, and the plurality of reinforcing bars are cast within the slab;
• wherein the dome and the slab form the void along the longitudinal span.