"positive drainage" meaning in English

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      "expansion": "positive drainage (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "the drainage condition in which consideration has been made during design for all loading deflections of the deck and additional roof slope has been provided to ensure drainage within 48 hours following rainfall during conditions conducive to drying."
      ],
      "id": "en-positive_drainage-en-noun-dW8ICHTb",
      "links": [
        [
          "construction",
          "construction"
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        [
          "design",
          "design"
        ],
        [
          "load",
          "load"
        ],
        [
          "deflection",
          "deflection"
        ],
        [
          "deck",
          "deck"
        ]
      ],
      "raw_glosses": [
        "(construction) the drainage condition in which consideration has been made during design for all loading deflections of the deck and additional roof slope has been provided to ensure drainage within 48 hours following rainfall during conditions conducive to drying."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing"
      ]
    }
  ],
  "word": "positive drainage"
}

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      "expansion": "positive drainage (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "the drainage condition in which consideration has been made during design for all loading deflections of the deck and additional roof slope has been provided to ensure drainage within 48 hours following rainfall during conditions conducive to drying."
      ],
      "links": [
        [
          "construction",
          "construction"
        ],
        [
          "design",
          "design"
        ],
        [
          "load",
          "load"
        ],
        [
          "deflection",
          "deflection"
        ],
        [
          "deck",
          "deck"
        ]
      ],
      "raw_glosses": [
        "(construction) the drainage condition in which consideration has been made during design for all loading deflections of the deck and additional roof slope has been provided to ensure drainage within 48 hours following rainfall during conditions conducive to drying."
      ],
      "tags": [
        "uncountable"
      ],
      "topics": [
        "business",
        "construction",
        "manufacturing"
      ]
    }
  ],
  "word": "positive drainage"
}