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如何计算Roof Pitch Angle

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Roof pitch describes slope using rise:run ratio or angle. Calculating pitch angle from measurements helps with roofing material selection and water drainage analysis.

公式

Pitch angle = arctan(rise / run); also expressed as X:12 ratio

分步指南

  1. 1Measure vertical rise and horizontal run of roof section
  2. 2Calculate rise/run ratio
  3. 3Convert to angle or standard 12-inch run notation

例题解析

输入
Rise: 6 ft, Run: 12 ft
结果
Pitch = 6:12 or 26.6°
Common residential roof angle

常见错误注意事项

  • Measuring along sloped surface instead of horizontal/vertical
  • Confusing rise and run

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