Aluminium Alloy Rope Ladder Replacement Steps & Preventer — IMPA 232021-232024

These replacement steps and anti-twist preventer bars are essential spares for the aluminium alloy rope ladders carried on cargo ships, container vessels, tankers, bulk carriers, and offshore support vessels. On board, rope ladders are used for pilot access, embarkation ladders, overside work, and emergency escape routes; a damaged or missing step can render the ladder unsafe or unserviceable. The GS-A general-purpose step is a direct replacement for worn treads, the GS-B step is drilled and fitted for use with the SD preventer bar, the GS-C step is the reinforced bottom step that can be connected to a second ladder with a shackle, and the SD bar prevents the ladder from twisting in service. All four items are ordered individually by IMPA code, so you can stock exactly the spares your ladder inventory requires.

Each step is a 117 × 462 mm aluminium alloy tread with a non-slip surface and an effective tread width of 420 mm. The GS-B adds an attaching bracket and toggle pin for quick fitting of the SD preventer, while the GS-C has an enlarged end profile (150/60/90 mm) with a shackle connection hole. The SD preventer is a 27 mm diameter round bar, 1,830 mm long, with 6 mm rings and 8 mm holes at each end; the centre section is 480 mm with 675 mm legs, and it detaches when not required. These components match the standard ladder build using 35 mm step pitch and 14 mm synthetic fibre side ropes, and the aluminium construction keeps weight low while resisting corrosion in the marine environment.

ALL-K MARINE Ship Store supplies the full IMPA-coded range from China for wholesale and retail buyers, including ship chandlers, purchasing officers, and chief engineers who order by IMPA number. The 232021–232024 series covers 4 variants — GS-A, GS-B, GS-C, and SD — and every code is available and priced individually. We hold stock across the IMPA range with supplier QC inspection before dispatch, and we issue quotations within 24 hours. Orders ship worldwide through freight forwarders, and we can deliver to your local ship agent on request. Contact us with your required IMPA codes and quantities for a current quote.