How Much Snow On Roof Is Too Much Montana

It may be one foot high in one spot and eight feet high in another spot.

How much snow on roof is too much montana.

What was once a gym image. It doesn t take much snow piled up into one concentrated area to collapse a flat roof. In case you need to know the snow load requirements should you be thinking to build a house in montana you can go to the montana ground snow load finder. The chart below courtesy of paul schimnowski p e gives some examples of snow loads.

Local and or state requirements on the ground snow loads or the roof loads subsequently calculated from these values supercede the values provided by this snow load finder tool. Big snow year proves to be too much for montana state university roof adrian dolatschko march 15 2019 weather. These questions aren t quite so easy to answer because there are several variables. A depth of more than 30 cm of snow may be greater than your roof can support.

Right off the top count on a minimum of 30 psf that is state code. It is right on up there with a balcony at 55 to 60 psf. Montana ground snow load finder. How much snow can pile up on your rv roof every winter.

On thursday and saturday march 10th and 12th two gym roofs at montana state university msu in. So how much snow does this equal. How much snow a roof can hold depends on the type of snow roofline and material among other considerations. 2 spruce rafters can handle a maximum span of about 15 ft.

Packed snow 7 5 to 12 5 cm 3 to 5 in of old snow is equivalent to 2 5 cm 1 in of water or about 2 3 kg 5 pounds per square foot of roof space. Several feet of snow have piled up on roofs across the state over the past couple days. We have a high snow load. Armed with that number a builder can frame the roof appropriately.

For example where the design load is 50 psf 2x10 no. As everyone knows cold fluffy snow is very light while wet snow can be extremely heavy. For the twin cities metro area the roof snow load equals 35 pounds per square foot or 7 x 50. It seemed like common sense to me that a heap of snow would add too much weight to our northwood arctic fox.

You need to be careful with flat roofs. One business in missoula the silver theater already saw the affects too much. Over the past week as we got pummeled by a desperately needed snowstorm we watched the fluff pile up on our rooftop. After a big snow year in montana some areas of the state are struggling with the load.

In snow country that number might be anywhere from 30 or 35 pounds per square foot psf to more than 70 psf.