Exodermic deck system

A structural floor comprising:

• an open lattice grating base member formed solely by a plurality of main bearing bars and a plurality of distribution bars and without any tertiary bars, said distribution bars being substantially perpendicular to said main bearing bars, said distribution bars and said main bearing bars positioned and spaced to define interstices therebetween, said distribution bars intersecting and interlocked with said main bearing bars to distribute load transverse to said main bearing bars;
• a top component fixed to said grating base member, said top component having a planar top surface and a planar bottom surface, said planar bottom surface being parallel and proximate to the top surfaces of said plurality of distribution bars so that said top component does not fill the interstices of said grating base member;
• each of said main bearing bars having an upper portion, said upper portions of said plurality of main bearing bars being embedded within said top component;
• said plurality of main bearing bars further including means for forming a mechanical lock between said base member and said top component when said upper portions of said main bearing bar are embedded in said top component thereby preventing vertical separation between said top component and said grating base member;
• said upper portions of said main bearing bars effecting shear transfer between said top component and said grating base member in a horizontal direction parallel to said embedded main bearing bars and in a horizontal direction perpendicular to said embedded main bearing bars;
• said means for forming a mechanical lock comprising shear connectors capable of resisting shear forces in three axes, including a first horizontal axis transverse to said main bearing bars, a second horizontal axis parallel to said main bearing bars, and a third vertical axis perpendicular to said main bearing bars;
• said shear connectors comprise a plurality of spaced holes formed in said main bearing bar;
• and
• wherein said top component fills said spaced holes but does not penetrate said interstices between said main bearing bars and said distribution bars.

A structural floor consisting of:

• an open grating base member formed solely by a plurality of main bearing bars and without distribution or tertiary bars, said main bearing bars spaced to define interstices therebetween, said main bearing bars having an upper portion and a bottom portion;
• a top component fixed to said grating base member, said top component having a planar top surface and a planar bottom surface, said planar bottom surface of said top component being above the bottom portion of said main bearing bar so that said top component does not fill the interstices of said grating base member;
• said upper portions of said plurality of main bearing bars being embedded within said top component, said plurality of main bearing bars further including means for forming a mechanical lock when embedded in said top component thereby preventing vertical separation between said top component and said grating base member;
• said means for forming a mechanical lock effecting shear transfer between said top component and said grating base member in a horizontal direction parallel to said embedded main bearing bars and in a horizontal direction perpendicular to said embedded main bearing bars, and;
• said means for forming a mechanical lock comprising shear connectors capable of resisting shear forces in three axes, including a first axis transverse to said main bearing bars, a second axis parallel to said main bearing bars, and a third axis perpendicular to said main bearing bars.

A structural floor comprising:

• an open lattice grating base member formed solely by a plurality of main bearing bars and a plurality of distribution bars and without tertiary bars, said distribution bars being substantially perpendicular to said main bearing bars, said distribution bars and said main bearing bars positioned and spaced to define interstices therebetween;
• said distribution bars intersecting and interlocked with said main bearing bars to distribute load transverse to said main bearing bars, said main bearing and distribution bars forming an integral unit;
• a top component fixed to said grating base member, said top component having a planar top surface and a planar bottom surface, said bottom surface of said top component not filling the interstices of said grating base member;
• upper portions of said distribution bars extending above the top surfaces of said main bearing bars and embedded in said top component.