Thresholds & Ramps An extensive list of Pemko commercial and residential thresholds, modular ramps, and various components to fit any need. Commercial ThresholdsChoose aluminum plates, carpet separators, elevators, floor plates/safety treads, and a wide range of commercial door threshold options including Eco-V, heavy duty and thermal barrier thresholds. Residential Thresholds/Sills For Pre-Hung OpeningsSelect from our variety of thresholds and sills for residential applications, including: interlocking thresholds, hooks, threshold caps, water return interlocking thresholds, saddle thresholds,... Modular Ramps (MR)Ramp thresholds are often used to transition offset floor conditions. These shapes are designed to meet the requirements for accessibility.