Snow Drift On Gable Roofs

For gable roofs a rectangular drift surcharge was prescribed and the rectangular shape remained unchanged everywhere along the ridge line.

Snow drift on gable roofs.

The gable roof exhibited a slightly higher accumulation coefficient than the flat roof. Resulting drift formation was envisioned as perpendicular to the roof step para pet wall or ridgeline. The wind causing snow transport and. Windward snow drifts occur when wind blows snow from a lower elevation roof towards the wall of an adjacent higher roof.

Current provisions of snow load in load standards codes are primarily based on limited case histories and engineering judgment. Snow can either blown from the low side of the roof towards the high side or is blown off the higher area of the roof onto the lower projected side. In snowy regions an accurate prediction of drifting snow loads on gable roofs is essential for structural designs. For the case of a roof step where leeward and windward.

Leeward snow drifts occur when wind blows snow off of a higher elevation roof down onto an adjacent lower roof. Gable roof drifts slope limits there is a range of roof slopes which require gable drifts lower limit is on 12 upper limit is 7 on 12 39 gable drifts upper limit observations by ttea unbalance for 6 on 12 less consistent with max slope of roof step drifts 1v 2h angle of repose of drifted snow 30 40. Gable roof is a typical roof style which is commonly used in many countries.