An extension ladder, a method for positioning the extension ladder and a system for moving the extension ladder

The invention relates to an extension ladder, a method for positioning the extension ladder and a system for moving the extension ladder. The extension ladder includes: a base section having a right base rail and a left base rail in parallel and spaced relation to the right base rail; a flight section having a right flight rail and a left flight rail in parallel and spaced relation to the right flight rail; a top cover attached to a top of the right flight rail; and a locking mechanism that secures and locks the flight section to the base section at a desired position relative to the base section. 本申请涉及一种伸展梯、用于定位其的方法和用于移动其的系统。所述伸展梯包括：底座区段，其具有右底座轨和与所述右底座轨成平行且间隔关系的左底座轨；飞行区段，其具有右飞行轨和与所述右飞行轨成平行且间隔关系的左飞行轨；顶盖，其附接到所述右飞行轨的顶部；和锁定机构，其在相对于所述底座区段的所需位置处将所述飞行区段固定和锁定到所述底座区段。