Which Is More Reliable? Despite the fact that they can support a variety of weights depending on their size, style, and design, fibreglass and Aluminum Extension Ladders share the same strength. There is a wide range of sizes and designs available for fibreglass and aluminum ladders, all of which are capable of supporting substantial loads. However, the ladder’s weight capacity should be taken into consideration when selecting one. There are many different types of portable ladders, including stepladders, stepstools, stair ladders, extension ladders, trestle ladders, sectional ladders, combination ladders, single ladders, platform ladders, and others. In the United Kingdom, there are three types of ladders available: For each classification, the maximum safe working load for an EN131, Class I, or Class III A ladder is shown. Class 1 ladders are appropriate for industrial use due to their maximum load capacity of 175 kilograms and duty rating of 130 kilograms. EN131 la...