FRAME TYPES Get a Quote For Your Metal Building Free Quote Clear Span Gable Symmetrical Frame Clear Span Gable Symmetrical Frame provides an open, unobstructed view without the need of column support. Modular Gable Symmetrical Frame Clear Span Gable Symmetrical Frame utilize interior columns that help provide structural support for the frame. Lean-to Frame Lean-to Frames attach to the side of the building. Clear Span Single Slope Frame Clear Span Single Slope Frames provide a roof that is pitched.