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- noun Plural form of
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The forward ends of the laggings were then supported by a timber rib and sill.
For all exposed surfaces a 6-in. facing of 1-3 mortar was placed by setting 2×12-in. planks 4 ins. from the laggings, being kept to distance by 2×4-in. spacers, placing and ramming the concrete behind them, then withdrawing them, filling the 6-in. space with mortar and tamping it to bond with the concrete.
Concrete Construction Methods and Costs Halbert Powers Gillette