Hi all, I am looking for some advice on LOLER inspection plates. Specifically, we are about to take possession of a structure incorporating a fixed Davit socket. Normally these sockets are supplied with an identification plate; specifying the unique socket reference number, its Safe Weight Limit and date of inspection. However on this occasion the ID plate specifies the WLL; Working Load Limit. I can find references from UK suppliers for WLL, but these appear to refer only to individual components such as slings, hooks and shackles but not the whole lifting device. (I cannot contact the supplier as the construction industry is shut down here for two weeks ; local trade holidays). Knowledgeable advice welcomed; thanks. PH2

PH2 - hope this helps. Safe Working Load (SWL) The maximum load (as determined by a competent person) which an item of Lifting Equipment may raise, lower or suspend under particular service conditions, e.g. the SWL can be lower than, but can never exceed, the WLL. Normally SWL = WLL unless the Lifting Equipment has been de-rated. Working Load Limit (WLL) The maximum load, determined by the manufacturer, which an item of Lifting Equipment is designed to raise, lower or suspend. Some standards and documents refer to WLL as the ‘maximum SWL’.

I have worked with both WLL and SWL and Lodge15424 is spot on. You can adjust your own SWL to suit so long as it is below the WLL of prescribed by the manufacturer.