[Bridge door threshold ramp]: The doorway transition ramp was mainly designed for the sliding door threshold. Cover the runners/slider and allow you access to various rooms in your house via wheelchairs without damaging the original molding or doorsill. [Easy to use doorway ramp]: The portable ramp is made of reliable iron alloy. 28LBs weight is definitely not that hard to put it down and move by yourself without asking for assistance. Suitable for threshold height less than 1.6in & width less than 5.6in at the same time. [Sturdy and well constructed ramp]: Fully welded design & one -piece bottom support brings max 800LBs capacity, allowing the doorway ramp to withstand heavy usage without compromising its integrity. 31.5" width is suitable for almost all kinds of wheelchairs, scooters & walkers. [Widely used door threshold ramp]: You could use the ramp to cover the doorsill when use bottom support. You could also remove the bottom support for regular steps less than 5" height. One-piece design makes it easily move from one place to another location at any time. [Warm tips for the access ramp]: Please measure your threshold dimensions in advance, paying particular to attention to the height & width that was needed, or it won't fit your doorways. You won't be able to close your door with this temporary ramp in place. Sliding Door Threshold ramp 31.5" W*24.8" L, Metal Bridge Doorway Threshold ramp to go Over The Threshold for wheelchairs/Scooters/Walkers(For threshold height < 1.6" & Width ＜5.6")