| 摘要 |
A generally U-shaped carpentry building tool is provided, which includes a reference plate member for placement on one or more building members and having an inner edge and outer marking edge; a first marking guide arm connected at 90 DEG to one end of the reference plate member; a second marking guide arm connected at 90 DEG to the other end of the reference plate member to form a generally U-shaped tool; a first lip member connected to one edge of the reference plate member to form a first right angle, corner-engaging member for engaging the corner of the one or more building members to properly position the reference plate member relative to the one or more building members; and a second lip member connected at 90 DEG to the center of the second marking guide arm to form a second right angle, corner-engaging member transverse to the first corner-engaging member for marking off a predetermined position to provide the proper centerline alignment of a second building member relative to the one or more building members.
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