DIY Frequently Asked Questions / Framing Square')">
90 degree L-shaped tool made from one piece of material (steel or aluminum), with the long end (blade) usually 24″ and the short end (tongue) 16″.
Also known as carpenter’s or rafter square because this tool is generally used for laying out rafters and marking stair stringers.
Similar squares are also available in other sizes (8″ x 12″).
Generally has framing tables (rafter and Essex tables) etched into the body to provide information on roof framing.
Also has ruler increments printed on the inside and outside edges.