RR-404 RD4 Twin-Rope Work-Positioning Descender

The PGTEC RR-404 RD4 is a twin-rope work-positioning descender designed for technicians who operate on two independent kernmantle ropes, certified to EN 12841 type C and engineered for 10-13 mm ropes. By running two parallel ropes through a single rigid aluminium frame, the RD4 lets the worker split between a primary work line and a secondary safety or rescue line, or rig a two-rope system for operations where a single-point failure cannot be tolerated. The frame carries two independent rope channels with stainless adjustment bars on each, so that each line can be tensioned independently, and a short navy positioning lanyard links the device to the harness. The parallel configuration gives a wide, stable working posture, reduces rope twist, and makes it simple to transfer the load from one line to the other during rope changes without coming off the wall. Typical applications are steeplejack and tower work, ship-mast and rigging access, bridge stay-cable inspection, and any two-rope rope-access operation governed by stringent rescue procedures. The RD4 accepts two ropes of the same 10-13 mm range, supports a combined load up to 140 kg, and weighs 480 g. PGTEC supplies it with an inspection log, a detailed set-up diagram and a five-year guarantee; the device is fully compatible with the PGTEC RP1 and RP2 kernmantle ropes and pairs naturally with the RR-406 pull-through rescue lifting system for hauling a casualty on one line while the rescuer is on the other.