A door threshold may include upper and lower members for sandwiching carpet and/or carpet padding therebetween. The threshold may, in certain example embodiments, grip the carpet in order to prevent it from being pulled out from between the upper and lower threshold members. Thus, in certain example instances, the need for tacks (or carpet tack strip(s)) proximate the threshold can be reduced and/or eliminated. In certain example embodiments of this invention, the threshold structure may include a locating bracket that is provided proximate the door frame for frame alignment and security purposes, and/or one or more pans located under the threshold for locating and/or securing purposes. Levelers, shims and/or the like may be used in certain example embodiments in order to compensate for non-level flooring proximate the door.