Hall Spars - Hayden Whitburn demonstrates a batten under bend test. Normally a specified weight is hung from the batten and the bend measured against the three rollers in adjustable position on the track

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Hall Spars - Hayden Whitburn demonstrates a batten under bend test. Normally a specified weight is hung from the batten and the bend measured against the three rollers in adjustable position on the track

© Richard Gladwell

Hall Spars - Hayden Whitburn demonstrates a batten under bend test. Normally a specified weight is hung from the batten and the bend measured against the three rollers in adjustable position on the track photo copyright Richard Gladwell taken at and featuring the class