What is a framing square? The basic definition is a flat tool usually made of metal in the shape of the letter “L”. The corner of the tool is an accurate 90 degree right angle. On each arm, there are usually engraved or stamped measurement increments on the face. The name comes from its use by carpenters to lay out framing and make sure everything is square. It is in fact an indispensable tool in the carpenter’s tool bag.
What is a framing square used for? Framing squares are one of the most common tools used by carpenters, contractors, and woodworkers. They allow for accurately measuring right angles in many circumstances. Stairs, walls, and roofs can all be framed by using this square. The length of the arms also make framing squares good for drawing lines from point A to point B.
What is a framing square used for in roofing? A framing square often comes with a table etched on it. Roof slope is calculated as how many inches the roof rises over a 12” run. A 7/12 roof pitch is when the roof rises 7” over the 12” span. To get the proper dimensions for a roof though, further calculations are needed. This is where the table comes in handy. The common rafter length, hip and valley rafter lengths need to be calculated. Jack rafters that run from the hip or valley to the common rafter have a common angle that needs to be calculated. The table on the framing square provides values for these bits of information.
What is a framing square used in building stairs? A framing square makes building stairs easier. The first step is to determine the rise and run of the stairs. Rise indicates the height of the stairs, while the run is the horizontal surface you step on. On each side of the stair case, there is going to be a stringer that contains an outline of all the steps. (Sometimes there is an additional middle riser on wider stairs). The steps need to be cut out of each riser. The framing square will handle this. Set the left side to handle the rise of the stair. Set the right side to handle the run. Then draw a line on the riser around the framing square. This will be the outline of the step. The outline is then removed and the risers are ready to go.
– Professional Power Tool Guide
