Preventing Snow Load Collapse of Large Box Buildings
The building code used to design buildings for snow loads is based on a 50-year maximum snowfall. However, record snowstorms do occur occasionally and as such, should be considered. The presentation will cover causes of collapse such as repeated snow, rain and ice storms, frozen downspouts or drains that prevent water from draining off of the roof, and/or an expansion that may cause extra drift to settle on a lower roof not designed for such loads. This discussion will provide an outline for the steps necessary to set up a snow load action plan.
1. Evaluate snow load capacity and measure/calculate snow loads
2. Describe ways to avoid collapse in heavy snow falls
3. Determine if excessive snow load, poor design or poor maintenance caused roof collapse 4. Identify factors determining roof repair or replacement