3-part ladder with rungs, usable as both a standing ladder and a sliding ladder, insulating up to 1000 V AC/1500 V DC. This combined three-part ladder can be used as both a standing ladder and a leaning ladder. When used as a standing ladder, the third upper section serves only as a safety bridge. Optimal stability is ensured by a base traverse, and the sliding ladder is height-adjustable from rung to rung by hand. It features two wall rollers at the top of the ladder, an aluminum locking and opening mechanism, high-strength tension straps to prevent accidental opening of the standing ladder, and hollow fiberglass profiles in H-shape (90x32 mm, 70x32 mm for 8 rungs). The aluminum rungs have dimensions of: rung cross-section 27x27 mm, rung spacing 280 mm, and are tested according to EN 131 (except for 3x14 rungs!). Number of rungs: 3x10. Height of the standing ladder: 2.90 m. Maximum height of the sliding ladder: 7.45 m. Weight: 32 kg. This plastic ladder features tested, extremely weather-resistant fiberglass profiles that are electrically insulating, specifically designed for professional users working near cables, connections, or other live electrical installations. It is lightweight and handy due to the special construction of the fiberglass profiles (hollow or C-profile) as well as aluminum rungs and steps, with rungs and steps permanently double-riveted to the profiles. Rung spacing is 280 mm with a load capacity of 150 kg, and it has a slip-resistant stand due to rubber ladder shoes. Includes detailed operating, assembly, and safety instructions. The ladders comply with the European standard EN 131 and electrical tests according to DIN 53 481, 53 482, and 53 483 by the independent testing institute C.E.S.I., with a 5-year durability guarantee.