During the Installation offshore, Heerema Marine Contractors Ned Se (HMC) needed a safe access to the Culzean jacket. ERP Trading BV was invited to fabricate a base frame for its rental stair towers and also for the rent of 4 sections including a topsegment. After a successful load-out at HFG Yard, ERP Trading BV was invited to install the rental stair tower onboard Barge H-542.