{"article":{"id":"court-drainage-slope-and-weather-runoff","categoryId":"court-infrastructure","categoryName":"Court Engineering & Infrastructure","index":7,"question":"What is the mandatory drainage slope for outdoor pickleball concrete slabs?","answer":"Outdoor courts must be sloped uniformly at 0.83% to 1.0% (1 inch per 10 feet) along a single plane to prevent standing water birdbaths.","answerDetail":"Proper drainage engineering is essential to avoid pooling water, known as 'birdbaths', which blister acrylic surfacing and delay post-rain play. The American Sports Builders Association (ASBA) mandates a minimum uniform slope of 1:120 (0.83%) to 1:100 (1.0%) along a single continuous plane (typically side-to-side or diagonal). Multi-directional crowns, common in highway civil engineering, are strictly prohibited on pickleball courts because any surface apex causes erratic ball bounces across the kitchen line. After heavy rain, a properly sloped court should shed surface water within 45 to 60 minutes with squeegee assistance.","intentTags":["drainage","court-slope","rain-runoff","asba-standards"],"searchKeywords":["pickleball court slope","drainage slope 1 percent","court birdbaths","acrylic water pooling"],"facilityTags":["proper-drainage"],"serviceTags":["construction"],"environmentTags":["outdoor"],"structured":{"requiredSlope":"0.83% - 1.0%","planeType":"Single continuous plane","postRainDryTime":"45-60 minutes"},"lastVerified":"2026-09-20","canonicalUrl":"https://dink-digest.com/knowledge/court-drainage-slope-and-weather-runoff"},"discovery":{"canonicalUrl":"https://dink-digest.com/knowledge/court-drainage-slope-and-weather-runoff","hubUrl":"https://dink-digest.com/knowledge","categoryArticlesUrl":"https://dink-digest.com/api/knowledge?category=court-infrastructure"}}