Sentence:  <WSD>Ladders</WSD> are heavy and unwieldy. Handle them properly to avoid damaging property and to make sure you don't injure yourself. Carry a <WSD>ladder</WSD> upright, not slung across your shoulder. Hold the <WSD>ladder</WSD> vertically, bend your knees slightly, then rock the <WSD>ladder</WSD> back against your shoulder. Grip one rung lower down while you support the <WSD>ladder</WSD> at head height with your other hand, and then straighten your knees. 
Meaning of the word marked with <WSD> tags:  A frame, usually portable, of wood, metal, or rope, used for ascent and descent, consisting of two side pieces to which are fastened rungs (cross strips or rounds acting as steps).