Compound miter and bevel angles for crown, base, and trim.
Square footage, waste factors, and board feet.
Rise, run, and stringer layout for code-compliant stairs.
Pitch, rafter length, and ridge beam from roof slope.
Drive pivot nail this far below the spring line. String = Radius.
Mark this distance from each end of the major axis. Drive pins here.
Router trammel: bit-to-pin distances. Major pin rides the long track, minor pin rides the short track.
Tilt blade to this angle when ripping wide panel edges.
Tilt blade to this angle when ripping narrow panel edges.
Dihedral = clamp angle for glue-up. A right-angle box = 90°.
Measured at the far end (trailing end, away from the blade).
⚠ Birdsmouth exceeds 1/3 rafter depth — consider deeper stock.
Rafter geometry only. Does not determine structural adequacy. Verify with local code and a licensed professional.
For reference only. Verify with local code authority and licensed professionals.
Based on simplified uniform load assumptions. Does not account for point loads, cantilevers, notching, or bearing. Verify with a licensed engineer.
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