A ladder is a collective set of steps, linked vertically via two horizontal rods. These steps are called rungs and the rods supporting them are called stiles. A ladder is commonly used for climbing at home or at work. There are two types of ladders -- rigid or hard material ladders and rope ladders. Rigid ladders are generally portable, but are sometimes fixed permanently to buildings or structures.

Ladders come in variety of styles and heights. They can either be rented or purchased. Styles include stool, foldable and single length ladders. Each ladder has a defined weight that it can support and come in a choice of materials like aluminum, fiberglass, steel, wood and iron. Fiberglass ladders are the strongest and most durable. Although a bit heavier than aluminum, they do not present any risk while doing electrical work.

Rigid ladders serve a lot of purposes. They are used for attics, pools, docks, libraries, shops, etc. They are available in many styles. Besides the simple and straight fixed ladder, an extension ladder is also useful. It is divided into parts that are easily foldable or expandable to provide double the height. The stepladder is an inverted v shape and fixed from the center. Platform stepladders are a refinement of stepladders, since they have a comfortable horizontal platform at the top. Telescopic ladders are a great invention. The stiles of this type of ladder can slide inside each other for minimum storage. Ladders with a hook at the top provided for better grip are called roof ladders and hook ladders. Rope ladders are useful where storage space is very limited, or the weight has to be kept to a minimum. Rope ladders come with rigid or flexible rungs. It requires specialized skill to climb a rope ladder, since it tends to swing freely like a pendulum and is not stationary.

It is advisable to take precautions while climbing a ladder. The ladder should be placed at a calculated distance from the wall on which it is leaning. It is recommended that for best stability, this distance from the bottom of the ladder should be one quarter of the height of the ladder. It is a good practice to use ladder stabilizers. They enhance the ladder's grip on the ground surface. To avoid unnecessary falls from the ladders, one must place it properly and wear clothes that will not get in the way of stepping. Ladders can be found in hardware shops or on the Internet.