| 摘要 |
A permanently-installed form-drain (10) including hollow, foraminous planks (12) and connectors (16, 18) for joining two or more of the planks in a continuously arranged concrete barrier. The insta nt improvements include an adapter (20/21), which serves as a straight connector, grooved plank (19) with interlocking stake (13/14), integral connector-stake and adapter-stake device (16/14, 20/14) and a tri-functional, generally rigid bracket and bracket-stake (22 and 22/22x) element, used to space and restrain/constrain the planks and/or to hold (support) reinforcement bars.</ SDOAB>
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