Over the past few years, snowfall has increased astronomically in northern areas. The increased snow loads have pushed roofs to their limits, often resulting in their collapse. Those who have erected steel buildings, however, have found that, for the most part, their roofs are sturdy and safe, even under the heavy loads of snow dumped on the north this past winter. With scientists and meteorologists expecting even deeper extremes of snowfall in the coming years, it’s even more important to consider the snow load ratings for the roofs on steel buildings of all sizes.
In the North, where snowstorms can dump tons – literally – of snow on a rooftop, steel buildings should feature design alterations to help roofs shed snow more easily and bear the weight of snow without collapsing. If you’re looking to steel buildings to house your car, the last thing you want to worry about is the roof falling in on your precious automobile. These four tips can help you build safer steel buildings in high snow areas.
Strengthen Your Foundation
Your building is only as strong as the foundation upon which it sits, and the roof is no stronger than your steel building. Have the soil of your building site tested for strength. Consider how much weight two to three feet of snow can add to the load your foundation is carrying when you design the foundation. You may need to add concrete columns or build a thicker concrete foundation to ensure that your building’s foundation will support the weight.
Add Structural Support to the Walls
Make sure that your building design will exceed standard load limits to take the weight of the snow into account. If you work with a company that provides plans for your metal building, make sure that the project engineer is aware of local building codes and the likelihood of frequent heavy snow. Proper engineering can amplify the strength of the steel and distribute the weight evenly to avoid stressing any one area. If possible, choose a design whose specs exceed the current codes for load-bearing. Safer is not only better, it will also prevent problems if the codes change in the future and you have to upgrade.
Choose a Design with a Steeper Roof
The steeper the pitch of the roof, the more easily the roof sheds snow and rain. Higher roofs require more materials and usually are more expensive, but the additional expense pays off in better safety, more usable space and less likelihood of leaks and roof damage from heavy snow and standing rain.
Choose a Darker Color for Your Roof
While lighter roofs are more energy efficient in warmer climates, that’s not true when your annual heating costs exceed annual cooling costs. A darker roof helps capture the heat of the sun and use it to melt the snow more quickly. If you live in climate zone 4 or above, choose a darker color roof for higher energy efficiency and a reduction in the chance of roof collapse.
If you’re putting up one or more steel buildings in a snow-prone area, be sure to design your metal structure, from foundation to rooftop, to withstand the weight of frequent heavy snow. It may cost more up front, but the additional safety and durability is more than worth the expense.