1/16 in Layout Squares & T-Squares - Grainger Industrial Supply

Brace shows calculation tables to determine triangular measurements for fitting knee, post, and other types of angled bracing. It also assists with laying out square foundations. Also known as a diagonal scale or brace triangle table, it typically runs along the back of the tongue (short leg).
Common Rafter Scale shows calculation tables to determine layout for rafter cuts in roof framing applications. It typically runs along the blade (long leg).
Degree Scale provides a reference to measure and mark angles of a given size, with the square functioning as a protractor. It runs along the hypotenuse (longest leg) of the square.
Hip and Valley Rafter Scale allows measuring and laying out hip rafters and valley rafters for modified- or extended-hip roofs.
Lumber assists with estimating the volume of a log and determining how many boards can be cut from it.
Octagon has dot increments running in sets of five along the tongue (short leg) to assist with laying out eight-sided framing or cuts for gazebos, cupolas, tables, posts, windows, and more. Also known as the eight-square scale, it's often used with compasses and dividers that transfer measurements from the scale to the workpiece.
Reverse Reading has two scales on each leg—one that reads left to right and the other that reads right to left—so there's no need to reposition the square to take measurements.

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