How to use a swanson speed square to cut rafters

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How to use a swanson speed square to cut rafters

Speed squares aren't just for marking 90- and 45-degree angles when you're cutting 2x4s. You can use a speed square to find roof pitches, guide your circular saw and more--including marking any angle from 0 to 90 degrees.Ever wonder why every contractor you see has a triangular square stuck in his tool belt? This cheap, handy little tool is called either a rafter square or a speed square, and it can offer you the biggest bang for the buck in your toolbox. This tool has dozens of uses; here are three of our favorites. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Speed square" ? news ? newspapers ? books ? scholar ? JSTOR (May 2021) (Learn how and when to remove this template message) A Swanson Speed Square. A speed square, also called a rafter square, rafter angle square, and triangle square, is a multi-purpose triangular carpenters' tool use for marking out. Its functions include many of those of a combination square, try square, and framing square. Carpenters use it to make basic measurements and mark lines on dimensional lumber, and as a saw guide for short 45 and 90 degree cuts. The term "speed square" is genericised trademark based on those owned by Swanson Tool Company[1][2] which first manufactured and sold the tool. History Albert J. Swanson invented the A Speed Square in 1925 as a carpenter's layout tool. He later founded Swanson Tool Company to produce it.[3] Today, Swanson Tool Company still manufactures and distributes the Speed Square and other carpentry tools from its headquarters in Frankfort, Illinois. Design Speed squares are manufactured from a variety of materials such as aluminum, steel, and composites such as HDPE. They are also made in several sizes, including 7 inch, 8 inch, 25 cm and a 12 inch sizes. Embedded degree gradations on the tool eliminate the need for trigonometric calculations and allow for lines to been more easily made. The tool is a isosceles right triangle with a ruler on one equal side and a fence on the other. It is marked with the word Pivot at the right angle point and displays Degrees on its hypotenuse, Common and Hip/Val markings on its midsection. Degree indicates the angle in degrees from 0? to 90?. Common indicates the rise in inches over a 12 inch run for common rafters from 1 inch to 30 inch. Hip/Val indicates the rise in inches over a 17 inch run for hip or valley rafters from 1 inch to 30 inch. Some models have divots for fitting a writing utensil to mark lumber with. Speed squares made by the Swanson Tool Company also have a diamond shape cutout on the ruler side at 3? inches. Usage Among its basic uses are marking common, hip, valley and hip, or valley jack rafters, laying out stair stringers, determining and marking angles, and making square cuts on boards. Common lines made using a speed square include perpendicular cut marks and angles for roofs, stairways, and decks. The tool uses a 0? reference. This means when a board is squared off the tool reads 0?. The angle derived is actually a complementary angle. For example a 22.5? angle is actually 67.5?. The sum of the angles equals 90 degrees (22.5? +67.5?= 90?). It is also obvious from a visual check that where the instruments displays 22.5? is not 22.5?. Many newer slide miters and miter boxes display both angles. Some of the new calculators have a 0? and a 90? references to do angular calculations. This can create confusion if the user does not understand this angular calibration. To find an angle such as 22.5?, hold the end of the square marked "pivot" against the board and rotate the square until the edge of the board lines up with appropriate number on the degree scale. Draw a line along the side of the square with the inches (pivot side) to indicate the angle for cutting. Use the "Common" scale to cut for Rise over Run. See also Combination square Try square Steel square References ^ "Trademark Status & Document Retrieval". United States Patent and Trademark Office. May 19, 2017. Retrieved 2021-05-01. Mark: SPEED SQUARE [...] Goods and Services [...] For: Hand tools, namely, squares [...] Owner name: Swanson Tool Company, Inc. ^ "Trademark Status & Document Retrieval". United States Patent and Trademark Office. May 19, 2017. Retrieved 2021-05-01. Mark: SPEED [...] Goods and Services [...] For: HAND TOOLS, NAMELY; SQUARES [...] Owner name: SWANSON TOOL CO., INC. ^ "History". Swanson Tool Company. n.d. Retrieved 2021-05-01. External links How to Use a Swanson Speed Square as a Framers Square The Rafter-Angle Square How To Use A Swanson Speed Square SPEED SQUARE MADE SIMPLE (video) Retrieved from " Accounts Opened in Store: One-time 20% off discount is not automatic; you must ask cashier to apply discount (bar code) at time of in-store purchase. Accounts opened online, via Text-to-Apply or QR code: You will receive one-time 20% off coupon/promotional code, which may be used in store or online. Max discount is $100 with this offer. Limited time only. Subject to credit approval. To qualify for this offer, you must open and use a new Lowe's Advantage Card and make a purchase 1/1/21 ? 1/31/22. Applications submitted in store with an associate: If you do not receive a credit decision within 30 minutes of submitting your application but are later approved, a 20% coupon will be provided in the card package. Applications submitted online, via Text-to-Apply or QR code: If you do not receive a credit decision immediately after submitting your application but are later approved, a 20% coupon will be provided in the card package. The 20% discount will be applied after all other applicable discounts. Offer cannot be used in conjunction with or on: (i) 5% Off Every Day offer, Special Financing or any other credit-related offer; however, if the 5% Off Every Day discount offer is greater than $100, the greater discount will automatically be applied; (ii) any other promotion, discount, markdown, coupon/bar code, rebate or offer, including any Lowe's volume or special discount programs (such as but not limited to Contractor PacksTM, Buy in Bulk, Quote Support Program ("QSP"), Special Value, New Lower Price, Was:Now, Military Discount, employee discount and Lowe's Price Match Guarantee); (iii) associate-discretion price adjustments; (iv) any services (such as but not limited to rentals; extended protection/replacement plans; shipping, delivery, assembly or installation fees); (v) fees or taxes; (vi) previous sales; (vii) gift cards; or (viii) Weber or Kichler products. Customer must pay applicable sales tax. Excludes Lowe's Business Credit accounts, Lowe's Visa? accounts and all Lowe's Canada Credit accounts. We reserve the right to discontinue or alter these terms at any time. Moving away from boards for a second, another really practical use for a speed square is using it for your saw. You should almost alway make sure your saw blade is square. For instance, with a circular saw, making sure there is no power going to the saw, you can push the blade guard back and making sure the blade is square to the bed of the saw. You can do this with any saw as well!Another thing to think about and check is to make sure the square is actually square. All you have to do is make a 90? line, then flip the square over and make sure that line is lining up right with no gaps. This is just something to look for every now and then.You can use a speed square as a guide for power tools, mostly done with a circular saw and man is this easy! You can use a square instead of measuring out the perfect line and clamping down a guide rail. Shop all construction squares from Johnson Level. Rafter Angle Squares Speed the job of rafter or angle layout by using our Rafter Angle Square, also known as a square. With one number on our square you can frame a roof or a solar panel support, or layout stairs, cabinets, trim work, or many other construction projects. Johnson's Rafter Angle Square has a handy 6" rule for quick measurements and scribing. The easy-to-read angle scale allows you to find any angle from 0 degrees to 180 degrees for many of your special designs such as carvings, picture framing, furniture, room dividers, shadow boxes, "cut-outs", routings and more. The rafter scales are laid out mathematically to take the time-consuming calculations out of your layout work. This gives you the accuracy you need with the convenience of using one number to work with. The Rafter Angle Square also makes an excellent right angle guide for an electric saw to run against. Both the professional tradesman and the handyman will find the Rafter Angle Square, convenient to use. All of the necessary instructions for basic roof construction are included in our accompanying PDF, along with other uses of the square such as stair layout and the framing of a solar panel support. An abundance of descriptive drawings and tables have been added, as well as an index for rapid access to each section. Download the Rafter Angle Square Construction Guidebook (3.2MB PDF) How to Read a Rafter Angle Square Find the lip edge. This edge keeps the rafter angle square from lying flat. Use it as a straight edge. Locate the hypotenuse, running at a 45 degree angle from the legs. Follow the lip and adjacent leg to where they form a 90 degree angle. This is called the pivot. Locate the common label along the long inner cutout. This measures pitch (generally used for roof pitch). Find the degrees along the hypotenuse. Use this measurement as an alternative to common. Back to top How to Use a Rafter Angle Square Lay the square on the surface of the material so the lip extends down the long side of the material. Rotate the lip away from the edge of the material around the pivot. The corner where the hypotenuse and lip meet should move, not the pivot. Line up the desired angle, as indicated on the hypotenuse, on the same edge as the pivot. If you are measuring by pitch as opposed to angles, line up the desired pitch, as indicated by the common edge, on the same edge as the pivot. Mark along the outside edge of the rafter angle square for your angled cut. Back to top How to Use a Rafter Angle Square for Roof Pitch Find a common rafter angled with the pitch of the roof. Use a spirit level to mark a straight vertical line across the rafter. This is called the plumb line. Align the lip of the rafter angle square along the plumb line. Line up the pivot point on the bottom edge of the rafter. Follow the bottom edge of the rafter to where it meets the common pitch reading. The corresponding value measures the pitch of the roof. Back to top How to Use a Rafter Angle Square for Rafters Put the square against the surface of the material you want to use. Mark the location of the diagonal edge. That will create a 45? line. Using the pivot point (the notch on the non-lip leg of the square), adjust the square until the degree gradation you need lines up with the edge. Draw a pencil line along the square on the surface. Press the square against the edge. Place a pencil tip into the notch to measure the number of inches you need. Keep the pencil in the notch and slide the square along the material. You'll get a straight line parallel to the edge. Position the square flat on the board you want to cut. Slide the saw shoe against the square. The rafter angle square is thicker so the saw cut will be precise. Back to top How to Cut Rafters with a Rafter Angle Square Determine the building's width and length and the rafter span in order to evaluate how many rafters are needed. Then determine the pitch. Divide the rafter's span by two to find the rafter's run. As an example, a building that's 24 feet wide has a rafter run of 12. If your rise is 5, the pitch is 5/12. Spacing the rafters 24 inches apart, you'll need 15 rafters for a 30-foot long building. Mark the top (the plumb) first. Put the pivot point, where the square's straight edge meets the lip side, at the rafter board's top edge. Rotate the square until the correct pitch is in line with the board's edge. Using the opposite side of the square, draw a line down the side of the board. This is your plumb line. After the rafter length is set and cut, make another cut 3/4 inch from plumb to allow for two-inch ridge board for where rafters meet. Find the rafter length needed by consulting the rafter table inside of therafter angle square manual. Returning to our example, a 5/12 inch rafter has a length of 13 inches. Find the birdsmouth joint. The instructions can be found within your Johnson Level rafter angle square instruction manual. Back to top If you're in need of more tool use information, stop by the guide of how-to's from Johnson Level. Shop all construction squares from Johnson Level.

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