Roof Loading Wisconsin

The balanced snow load is applied everywhere where the roof structure is located.

Roof loading wisconsin.

If your structure has a sloped or flat roof you still need to calculate the flat roof snow load. Roofs are under a lot of pressure. In addition to estimating the roof loading it s important to know the loading the roof can resist. Wisconsin s uniform dwelling code requires most homes to have a minimum snow load rating of 30 40 pounds per square foot lbs ft 2 with the greater requirement for northern wisconsin.

Roof loads are a downward vertical force on the home. Support the minimum snow loads listed on the zone map. Sps 321 02 1 b 2. Sps 321 27 1 c c sloped roof snow loads.

H load due to lateral pressure of soil and water in soil. Chapter 15 roof assemblies and rooftop structures. See pdf for diagram. Chapter 16 structural design.

Load limits on the roof of a building. Snow loads specified in s. However a south roof load zone home cannot be installed in either a middle or north roof load zone. On the upcodes website.

Also extremely relevant to roofs with sections on rain loads snow loads and wind loads. 2018 international building code. Use our wisconsin roof snow loads map to easily determine the roof design snow load wisconsin administrative code. After you obtain the roof slope factor from those sections in asce 7 10 the balanced design snow load for the sloped roof can easily be calculated using equation 7 4 1.

2002 wisconsin enrolled commercial building code. L live load except roof live load including any per1nit ted live load reduction. Sps 321 subchapter 2 for any location in the state of wisconsin. 2018 international building code.

On the upcodes website. Wisconsin has not adopted the international residential code irc and utilizes its own uniform dwelling code udc for all residential structures. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched.

The value of cs shall be determined by the following. May be reduced for roof slopes greater than 30 by multiplying the snow load by cs. Dwellings shall be designed and constructed to withstand either a horizontal and uplift pressure of 20 pounds per square foot acting over the surface area or the wind loads. L roof live load including any permitted live load reduc tion.

The determination of the drift load that is required for unbalanced snow load cases requires the use of the ground snow load pg not the roof snow load.