Union bricklayers on a Navy barracks project laid heavy block with up to 12 lift-assist robots at once, and their foreman said the machine does not displace the bricklayer

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Illinois, United States. The bricklayers' union journal describes the P-714 barracks at Naval Station Great Lakes, where union members laying concrete masonry units used the MULE lift-assist arm, with 12 machines working across the site at its peak; the contractor's foreman says the mason's skills are still needed and the machine makes the site safer and more productive, and the union's secretary-treasurer says its use is limited by building design and site coordination. One project described by the union; it reports no change in crew size or hours, and the units were heavy block, not ordinary brick.

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One project, heavy block only, and no figures on crew size or hours.

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