Roof Snow Load Support

If the weight of the actual snow load exceeds the weight a structure was designed to support the roof or even the entire structure can fail.

Roof snow load support.

Determine the load per square foot that the roof must support. Snow loads acting on a sloping surface shall be assumed to act on the horizontal projection of that surface. It also informs you whether you should immediately remove some of the snow or you can wait a little bit longer. The thermal factor c t from table e 3 determines if a roof is cold or warm slippery surface values shall be used only where the roof s surface is unobstructed and sufficient space is available below.

Overall a plan should be established by greenhouse operators before winter weather arrives. P s c s p f. The roof load is composed of a dead load and a live load. The term snow load refers to the downward force on a structure s roof by the weight of accumulated snow and ice.

To provide additional support in double poly covered greenhouses two by fours can be placed under weight bearing bow and purlin connections however snow removal may still be required. The dead load is constant and is estimated as 10 pounds per square foot for wood framed construction. The sloped roof snow load p s shall be obtained by multiplying the flat roof snow load p f by the roof slope factor c s. Basing on the roof parameters you specified in the first section our snow load calculator displays the maximum allowable snow cover thickness and snow weight.

If the snow weighs 10 pounds per cubic foot and there are 1 5 feet on the roof each square foot of the roof is getting 15 pounds of pressure. The live load depends on the maximum snow load in your area.