1977•US Army Corps of Engineers: Engineer Research and Development Center (Knowledge Core)Open access

Roof Loads Resulting from Rain-on-Snow,

S. C. Colbeck

Abstract

A computer program to calculate the increased live load on a snow-covered roof due to rain-on-snow is given. For the 25-year rainstorm falling on a heavy snow load on a flat roof in Hanover, New Hamsphire, and additional 98 kg/m2 (20 lb/ft2) of liquid water is added to the live load. The additional load due to rain-on-snow is very sensitive to the snow properties and characteristics of the roof. A wide range of live loads is possible, depending on the particular circumstances. (Author)

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Key concepts: Snow, Roof, Rain and snow mixed, Environmental science, Meteorology, Falling (accident), Range (aeronautics), Hydrology (agriculture)