| 摘要 |
A multi-purpose framing square for 2x dimensional lumber includes an elongate rectangular body with a width of 2x dimensional lumber and an L-shaped crossbar centrally attached at one end. The inner edge of the crossbar establishes a pivot point for rotating the body relative to the lumber. The outer edges of the body include longitudinal scales. The inner edges include radial lines referenced to the pivot points for establishing conventional pitches. A table is provided on the faces for establishing the rafter lengths for various roof pitches.
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