Pergola Dimensions Explained: 10×16 = Roof Size, Not Footprint

You're measuring for a pergola listed as 10×16. That's the roof footprint (beam-to-beam). The posts sit at or near the corners, so the base is roughly the same—but confirm with the plans.

What the Numbers Mean

• 10×16 = outside dimension of top beams (shade area).
• Post locations = typically at corners, sometimes inset 6–12″.
• Footings = 12–18″ diameter, 36–48″ deep (frost depth).

Layout Steps

1. Get the plan set—look for "Layout" or "Site Plan" sheet.
2. Measure diagonals to square the footprint.
3. Mark post centers, dig footings, set posts plumb.
4. Height: 8–10 ft typical. Over 12 ft = wind engineering needed.

Free Plan Reference

Reader's Digest 12×15 pergola plans + 3D view

Base material (patio, grass, gravel) is independent. The pergola sits on the landscape, not in it.