When did we begin using metal mesh platforms?

score:11

Steel grating for platform use was first developed and produced by Walter Irving at the beginning of the 20th century. It was first used for ventilation of New York's stiflingly hot subway system, but his company, Irving Subway Grating, quickly marketed it for a range of other uses including bridge decking and catwalks. Aluminum grates (which might be what's shown in the picture) came later.

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Source: stackoverflow.com

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