Portable safety barrier system

1. A support post base, said base having

a top face side, an opposed bottom face side for contacting a support surface,

two spaced apart first toe rail holder elements, and

two spaced apart second toe rail holder elements, said top face side presenting

a first support post engagement element spaced apart from a second support post engagement element,

each support post engagement element being configured for detachably engaging a support post for upstanding disposition thereof,

each toe rail holder element being respectively configured for detachably engaging a respective toe rail member for horizontal disposition thereof,

the two spaced apart first toe rail holder elements and the first and second support post engagement elements each being disposed along a first horizontal alignment axis such that the first and second support post engagement elements are disposed between said two spaced apart first toe rail holder elements,

the two spaced apart second toe rail holder elements and the first support post engagement element being disposed along a second horizontal alignment axis such that the first support post engagement element is disposed between said two spaced apart second toe rail holder slot elements, said second horizontal alignment axis being disposed transverse to the first horizontal alignment axis and intersecting the first horizontal alignment axis at an intersection, and

the first support post engagement element being disposed at the intersection of the first horizontal alignment axis and the second horizontal alignment axis.

2. A base as defined in claim 1 wherein said first post engagement element and said second post engagement element each comprises a respective socket element defining a socket for engaging a respective support post for upstanding disposition of said support post.

3. A base as defined in claim 2 wherein the socket elements of the base each have distal ends, wherein the base further comprises a female component disposed along a third horizontal alignment axis, said third horizontal alignment axis being transverse to said first horizontal alignment axis and being between said first and second support post engagement elements, said female component comprising an opening extending from said top face side to said bottom face side, and

wherein said first support post engagement element, said second support post engagement element, said female component, said top face side and said bottom face side, are configured such that, when two of said bases are stacked top face to top face whereby one base is an overlying base and the other base is a lower base

the socket elements of each base are able to register with the female component of the other base so as to be able to interlock both bases such that relative horizontal displacement thereof is inhibited,

the distal ends of the socket elements of each of the bases are disposed in the opening of the female component of the other base and,

the socket elements of the lower base are able to detachably engage a respective support post for upstanding disposition thereof.

4. A base as defined in claim 1 wherein second horizontal alignment axis is perpendicular to said first horizontal alignment axis.

5. A base as defined in claim 2 wherein second horizontal alignment axis is perpendicular to said first horizontal alignment axis.

6. A base as defined in claim 3 wherein second horizontal alignment axis is perpendicular to said first horizontal alignment axis.

7. A kit for a portable safety barrier system comprising at least two bases as defined in claim 1 or 2 and at least one portable safety barrier unit comprising a horizontal barrier component attached to two spaced apart support posts.