Remediation of corroded access steelwork and grating over fire-protected beams

Corroded steelwork on a gas platform had to be remediated by a fixed compliance date. Some of the grating sat over fire-protected beams.

A request for a new platform to replace an old one, with point cloud data, photographs and site measurements, and data on the passive fire protection coating on the steelwork, which was not to be disturbed.

A replacement access platform and stair, a lifeboat-area handrail and gate, a grating overlay, and new grating on bolted brackets so the passive fire protection could stay in place. The brackets were checked by hand and by FEA, with fatigue to EN 1993-1-9.

A concept report, calculations, fabrication drawings and 3D models, with support to the offshore installation team.

EN 1993-1-1, EN 1993-1-8, EN 1993-1-9, BS 4592, ISO 19902.

Concept options, calculations and detailed design; presented the design reviews.