The most recent types of ladders to flood the home improvement market are the 3 section loft ladders. These are very simple to manufacture from aluminum metal thereby reducing the costs which can be passed on to the consumer.
This design works by having 3 sections that can slide up and down, which makes your ladders height adjustable to three different levels. Now the only limitation is that the height cannot be adjusted to any particular level other than the 3 that are pre-determined by the manufacturers. This however is not a problem in my experience because of the way the aluminum loft ladder slides over the bottom of the ceiling.
Hand rail
At both sides of the framework a hand rail is usually included for health and safety reasons. This is also a desired feature if you use these ladders in the construction industry. My only problem with these hand rails sometimes that they can be too bulk and make the attic ladder harder to navigate than it should be. This in itself causes a risk of falling that could be avoided. Therefore my advice could be to go to a store and inspect the framework of the product before you buy it so that you do not get caught out with this design fault.
3 section ladders are usually aluminum
The 3 section loft ladders are usually made from aluminum because of the ease of linking that the metal allows. The heavier metals such as iron are known to bend after heavy usage and can be stuck in a particular configuration that does not allow the sliding mechanism to work. Whereas the aluminum could easily be bent back into shape to allow the levels to slide past each other.
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