Last Updated
：2025/11/24
positive drainage
Noun
uncountable
Japanese Meaning
構造物の設計時に、床や屋根の荷重によるたるみを考慮し、追加の屋根勾配を設けることで、乾燥に適した条件下で降雨後48時間以内に確実に排水が行われるように設計された排水状態を指す。
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(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.
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positive drainage
During the retrofit, engineers implemented positive drainage on the roof deck so that all loading deflections were accounted for and water would be removed within 48 hours after rainfall under conditions conducive to drying.
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During the retrofit, engineers implemented positive drainage on the roof deck so that all loading deflections were accounted for and water would be removed within 48 hours after rainfall under conditions conducive to drying.
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