Category: Temporary Works Design

Roam Marine designed a temporary loadout jetty to support a 300t crawler crane, including the concept and location of fender piles, pontoon and gangway for small boat access, across two spans with central piles positioned at the toe of the armour and seaward piles in the dredge slope. Scope included assessing the capacity of existing beams — originally sized for a 250t crane — and modifying as required for the larger crane, plus detailed design of new piles accounting for shallow embedment on bedrock, with smaller conical-tipped abutment piles to penetrate the seawall. A 400t jackup installed all piles except the abutment piles, which were installed using a land-based gate. The pontoon combines a 12m and 6m float with custom brackets and fendering at the piles, connected by a 20m-span gangway. A section of the seawall was removed for crane access, with sea-containers available to close the gap during a cyclone and prevent inundation of the laydown area.