Calculates the standard snow load values utilizing ASCE 7-16.

Inputs

Number Name Object Type Description Optional
1 Ground Snow Load System.Double The site-specific ground snow load No
2 Eave-to-Ridge System.Double The eave-to-ridge distance of the windward side of the building, in the model unit system. No
3 Roof Slope System.Double The roof slope, in degrees. Defaults to 0 (flat roof). Yes
4 Risk Category System.Int32 The building risk category. This must be either 1, 2, 3, or 4. Defaults to 2. Yes
5 Surface Roughness System.Int32 The surrounding surface roughness category. 0 = B; 1 = C; 2 = D. Defaults to 1 (C). Yes
6 Roof Exposure System.Int32 The roof exposure category. 0 = Fully Exposed; 1 = Partially Exposed; 2 = Sheltered. Defaults to 0 (Fully Exposed). Yes
7 Roof Surface System.Int32 The roof surface type. 0 = Unobstructed Slippery Surface; 1 = All Other Surfaces. Defaults to 1 (All Other Surfaces). Yes
8 Thermal Condition System.Int32 The roof thermal condition. 0 = All Other Structures; 1 = Structures Just Above Freezing With Cold, Ventilated Roofs; 2 = Unheated and Open-Air Structures; 3 = Freezer Buildings; 4 = Continuously Heated Greenhouses. Defaults to 0 (All Other Structures). Yes
9 Display System System.Boolean Whether to output results in the display unit system. If false, outputs in the model unit system. Defaults to false. Yes
10 Year System.Int32 The ASCE 7 code year. 2010, 2016, or 2022. Currently only 2016 is implemented. Defaults to 2016. Yes

Outputs

Number Name Object Type Description
1 Importance Factor System.Double The snow importance factor.
2 Exposure Factor System.Double The exposure factor.
3 Thermal Factor System.Double The thermal factor.
4 Slope Factor System.Double The roof slope factor.
5 Flat-Roof Snow Load System.Double The flat roof snow load, in the model unit system, unless the Display System input is set to true.
6 Min Low-Slope Snow Load System.Double The minimum snow load for low-slope roofs (< 15 degrees), in the model unit system, unless the Display System input is set to true.
7 Sloped-Roof Snow Load System.Double The sloped-roof snow load, in the model unit system, unless the Display System input is set to true.
8 Drift Height System.Double The snow drift height, in the model unit system. Reference ASCE 7-16 Figure 7.6-2.
9 Drift Length System.Double The length, measured from the ridge, over which to apply the drift load, in the model unit system. Reference ASCE 7-16 Figure 7.6-2.
10 Snow Density System.Double The snow density, in the model unit system, unless the Display System input is set to true.
11 Unbalanced Snow Load System.Double The unbalanced portion of the roof snow load, in the model unit system, unless the Display System input is set to true.. Reference ASCE 7-16 Figure 7.6-2.

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