One of the most popular types of construction and household service stairs is the stepladder. They are used almost everywhere, since there is a regular need to work with items above human height in various areas of human activity. High-quality aluminum stepladders are designed to heavy loads (up to one hundred and fiſty kilograms). They are durable and easy to use. In addition, since the stepladders are manufactured of aluminum profile, they are very light. Aluminum stepladders are with corrugated step surface and durable safety belt, reliably preventing the ladder's withdrawal from its operational position, and a safety rail about sixty centimeters high.