Abstract: An easy-to-construct modular wheelchair ramp with reliable dimensional stability in excess of all current regulatory requirements is provided. Such a modular device allows for a variety of ramp materials to be incorporated therein on demand as well as the utilization of any desired ramp pitch without any need to adjust (let alone actually use) connecting brackets and/or under-section supports. The double-channel stringer configuration thus allows for support legs to easily connect and move along such a component for facilitated set-up. Additionally, the double-channeled structure allows for any handrail materials to be properly and easily secured thereto. The stringer alone, as well as the overall modular ramp structure, are encompassed within this invention. The method of constructing such a wheelchair ramp is also envisioned within the invention.