Design Ground Snow Load for your project location as determined by the selected ASCE code. These values can be confirmed by consulting your local building authority.

Design Wind Speed for your project location as determined by the selected ASCE code. These values can be confirmed by consulting your local building authority.

Exposure B

Urban and suburban areas, wooded areas, or other terrain with numerous closely spaced obstructions having the size of single family dwellings or larger.

Exposure C

Open terrain with scattered obstructions having heights generally less than 30 feet. This category includes flat open country and grasslands.

Exposure D

Flat, unobstructed areas and water surfaces. This category includes smooth mud flats, salt flats, and unbroken ice.

The distance between roof attachments. This number should be less than or equal to the maximum span value listed for your selected XR Rail within the "Rails" section.

Typical residential installations have attachment spacing between 4' and 8', whereas commercial installations have spacing as high as 12'. Consult with a structural engineer or your local building authority to confirm the allowable attachment spacing for your array.

Max Cantilever is calculated as 0.40 x maximum span from engineered span charts.

Design Assistant allows you to choose the proper ASCE code standard for your region: 7-10, 7-16, or 7-22.

If you do not know which code standard is being used in your region, please contact your local building department.

Design Assistant allows you to use the old ASCE 7-10 code standard, the ASCE 7-16 code standard, or the latest ASCE 7-22 code standard.

If you do not know which code standard is being used in your region, please contact your local building department.

Design Assistant requires you to use the ASCE 7-16 code standard for this project.

If you do not know which code standard is being used in your region, please contact your local building department.

Design Assistant requires you to use the ASCE 7-16 or ASCE 7-22 code standard for this project.

If you do not know which code standard is being used in your region, please contact your local building department.

Spectral response acceleration parameter at short periods.

S_DS is based off of soil type D.

The panel you have picked is not included in IronRidge’s UL compatibility list.

If you normally use a specific panel for your projects or you almost always work with ASCE 7.16, you can create a preset with these values along with other project parameters. Then when you create a new project, you can choose to create it with this preset and the preset values will be prepopulated in your new project allowing you to configure a project and generate a bill of materials more quickly.

The height of the wall around the roof edge. If this height varies on your roof, use the average parapet height.

The thickness of the wall around the roof edge. If the build does not have a parapet, you can leave this blank or enter 0.

The minimum order for a custom rail length is 2,200 lbs.

The dimension crosshairs are two adjacent lines that intersect at a point that follows the cursor while you move it over the graphical representation of the roof. They have dimension markers that show the approximate real distance from the cursor point on the roof to the top, right, bottom, and left roof edges.

Margin of error: The dimensions shown are not pin point accurate. They have a margin of error, ranging from 1" on smaller roofs (25' x 25') to 5" on larger roofs (300' x 300').

Snapping: When the crosshairs are in use, there is an additional setting allowing you to toggle snapping. With this setting on, the dimension crosshairs will appear to be "magnetically" drawn to the edges of the grid cells.

The shift tools will move all of the placed panels by one position on the grid. When shifting, the panels that move off of the visible grid are removed.

You can also use the arrow keys on your keyboard to move the placed panels.

A proposal is considered to be an Atlas proposal if:

• It belongs to a company that is linked to an OpenSolar Organization (Org).
• It was created in OpenSolar after the OpenSolar Org was linked to the company.