Safety barrier, such as for children or pets, having an extension section

A safety barrier which is positionable in an opening between two supports, said barrier comprising:

• a frame including a lower horizontally-extending base member and spaced first and second vertical pillars attached thereto,
• an openable gate positioned between said first and second pillars and pivotally connected at one end to said first pillar so as to move between a closed and open state, and
• a plurality of extension assemblies which are aligned with one another and with the frame to increase a width of said barrier, each of said extension assemblies including a tope element having a horizontal channel therethrough, a bottom element having a horizontal channel therethrough, and a connection element extending between said top and bottom elements, and
• first and second elongated assembly elements which are sufficiently long to respectively simultaneously extend through said channels in said top and bottom elements of all of said plurality of extension assemblies and into aligned openings in one of said first and second pillars, said first and second elongated assembly elements providing lateral rigidity to the frame and said plurality of extension assemblies attached thereto.