| 摘要 |
An adjustable threshold has a lip portion with an adjustable vinyl insert to prevent material from becoming trapped or from engaging a seam present between a floor and a frame member portion adjacent to the floor. The adjustable threshold engages an H-rail trapped in the main U-shaped channel of the frame member which in turn covers and is generally supported by a substrate block. The H-shaped rail is trapped between walls of the U-shaped channel or members thereof. The lip serves to help entrap a second descending wall of the threshold cap and to keep it in place to provide support and stability for the threshold cap. Alternative embodiments exist wherein a lip is advantageously present in a variety of embodiments.
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