Roof Loading Wisconsin

Sps 321 subchapter 2 for any location in the state of wisconsin.

Roof loading wisconsin.

Sps 321 02 1 b 2. 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. 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.

May be reduced for roof slopes greater than 30 by multiplying the snow load by cs. The north zone middle zone and the south zone are identified on the roof load zone. Wisconsin has not adopted the international residential code irc and utilizes its own uniform dwelling code udc for all residential structures. Chapter 16 structural design.

The loads shall be assumed to act vertically over the roof area pro jected upon a horizontal plane. L roof live load including any permitted live load reduc tion. If the ground snow load isn t specified then a ground snow load needs to be assumed and the truss designer and the building designer may not be on the same page as it relates to this design assumption. Also extremely relevant to roofs with sections on rain loads snow loads and wind loads.

Chapter 15 roof assemblies and rooftop structures. Roof loads are a downward vertical force on the home. Sps 321 27 1 c c sloped roof snow loads. 2018 international building code.

See pdf for diagram. The value of cs shall be determined by the following. Use our wisconsin roof snow loads map to easily determine the roof design snow load wisconsin administrative code. 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.

Snow loads specified in s. H load due to lateral pressure of soil and water in soil. L live load except roof live load including any per1nit ted live load reduction. If your structure has a sloped or flat roof you still need to calculate the flat roof snow load.

On the upcodes website. On the upcodes website. The balanced snow load is applied everywhere where the roof structure is located. Load limits on the roof of a building.

Support the minimum snow loads listed on the zone map. 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. 2018 international building code. 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.