Beam Trolley dislodged from Gantry Beam

Cause & Consequence

• Collapse, overturn or failure of lifting equipment

Incident Location

Fixed Installation

Incident Activity

Lifting, crane, rigging, deck operations

Lessons Identified

The installation of a beam trolley constitutes a ‘rigging’ operation and by its very nature requires (as a minimum) an OPITO Grade 3 Rigger to perform this task. This was not identified at either the planning or implementation stages of the programme, therefore no provision was made for a OPITO Grade 3 Rigger, which ultimately led to the beam trolley being misaligned on the gantry beam during operation due to the fact that it was installed incorrectly.

Incident Recommendations

Indirect Causes?

• Beam trolley was not installed by competent person and the fact that the beam trolley was too wide for the beam was therefore not identified during installation.
• Neither the onshore responsible supervisor nor the offshore crew using the equipment were expecting the beam trolley to be out of tolerance and assumed the beam trolley was supplied ready to be installed and used.

Root Cause?

• Lack of understanding (both onshore and offshore) of the level of competence required for the installation of a beam trolley. Installation of a beam trolley is considered to be a ‘rigging’ operation and therefore requires a minimum competency of OPITO Grade 3 Rigger.