Ladders are the mandatory tools for most professionals, and they come in a variety of sizes, ratings, materials and etc. However, all of this suggests that they are quite different and therefore they offer different capabilities. Most people decide which the best ladders are by looking at the height they can reach. We can help you understand this tool much better. You can get additional info at http://www.ladderlounge.com/compact-ladders/.
Grade and capacity
Every single ladder is categorized according to its grade and weight load. These are the primary factors that can determine for which applications you should use that, particular ladder. They are usually divided as:
- III grade- Have capacity up to 200 pounds and they are used for household applications.
- II grade- 225 pound weight load and they are great for smaller, commercial applications.
- I grade- These ladders can withstand up to 250 pounds of load and they are heavy-duty models.
- IA grade- The weight load is 300 pounds. They are extra-heavy-duty models, capable of mode demanding operations.
- IAA grade- If you are looking for special ladders that can withstand up to 375 pounds of weight load, these ladders are the best choice. They are designed for special and the most demanding operations.
Keep in mind that the weight load and the grade can determine the applications a ladder can be used for. Never, absolutely never use III grade ladder for more demanding applications, where the weight load is above their capacity.
Different ladders are made from different materials, obviously. This means that they have different specifications, including the weight, length and etc. In general, you can choose between ladders made from wood (heavy), aluminum (lighter and more practical) and steel ladders (extremely resistant and durable but heavy).
Metal ladders are the latest and the most common choices. They are more resistant than those made from wood and aluminum ones don’t conduct electricity. In addition, they can reach high heights. We must add the fact that the type of ladders also determines the height. Here are a few examples.
- Ladders with a single section can reach 30 feet.
- Two-section models can reach 48 feet.
- Extension ladders can reach up to 60 feet.
- Stepladder can be used for heights up to 20 feet.
- Platform and trestle ladders also can reach 20 feet.
The mentioned heights are for metal ladders. They are currently the most common choices and the safest.