Portable ramp and loa support assembly

A ramp assembly comprising:

• a first molded ramp component including an elongated generally planar first tread portion having its lateral extremities forming integral lateral side walls, a first end portion at one end of said first tread portion being configured to engage a first support surface at a first elevation, a second end portion at an opposite end of said first tread portion having an integrally formed first plurality of apertured flanges extending therefrom to form a first hinge set, and means forming at least two elongated, integrally molded box-beams disposed in spaced apart locations beneath and extending along substantially the entire length of said first tread portion, said box beams being sealed at each end to form closed chambers therewithin;
• a second molded ramp component including an elongated generally planar second tread portion having its lateral extremities forming integral lateral side walls, a first end portion at one end of said second tread portion having an integrally formed second plurality of apertured flanges extending therefrom to form a second hinge set, a second end portion at an opposite end of said second tread portion being configured to engage a second support surface at a second elevation higher than said first elevation, and means forming at least two elongated, integrally molded box-beams disposed in spaced apart locations beneath and extending along substantially the entire length of said second tread portion, said box beams being sealed at each end to form closed chambers therewithin;
• and
• pivot means adapted to extend through the apertures in said first and second hinge sets so as to pivotally join said first molded ramp component to said second molded ramp component,
• wherein said first and second molded ramp components may be rotated about said pivot means between a folded configuration with said first and second molded ramp components lying substantially in side-by-side relationship, and an extended configuration wherein said first and second molded ramp components lie substantially in a common plane such that upon placement of said first end portion on a first surface and placement of said second end portion on a second surface, said assembly forms a ramp along which a pet can walk.