Load monitoring of temporary structures

I recently had the chance to catch up with an old friend from the industry, sharing memories and looking back on the time, when both of us were working in the industry. After more than an hour sharing some of the experiences gained of the handling of big analogue mixers, lifting heavy equipment and discussing touring or rather "the joys of living on a bus", we reached the planned topic of our meeting - The monitoring of live-loads.

Reflecting on the questions I got during our meeting, while glancing at some of the hottest topics in my mailbox. I decided to write this post, compiling some advise on load cells.

Q: "Which load cell system should we buy?"

Single axis load cells have had an increase in popularity in the industry during the last couple of year. The ease of use and simple read-outs is a clear benefit, but should not replace the load-calculations during planning.

Load cells are a great way to control actual loads and verify calculated loads, especially at venues and stages, being visited by productions, bringing their own lights or truss´. Or simply to document actual applied loads - a potential proof in case of insurance claims or possibly a chance to negotiate a decrease of the premium, when taking out insurance..

I can't recommend a specific system - but I've compiled a short list of caveats and general advice regarding this marvel of increased safety.

• When using single axis load cells, loads must be applied along the axis which is monitored, despite a lot of products formed as shackles - . Do check the documentation and follow manufacturer guidelines.
• Not all systems are designed to be used outdoors (do check the weather-resistance of each part - cell, repeaters, etc.)
• Load cells are sensitive (and expensive) equipment - Remember to train users accordingly.
• Discard any damaged/defective cells - despite the cost.
• Do remember to keep your system well-maintained and calibrated.