Swanson Speed Square Book Pdf

swanson speed square book pdf

File Name: swanson speed square book .zip
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Published: 19.06.2021

Post a Comment. Richard Birch and I are having a discussion on Shiften. He's proclaimed for years that the best method for finding the correct lengths for hip rafters and laying out the back bevel angles, hip rafter side cut angle, was in the Swanson's Blue Book that you get when you purchase their SpeedSquare.

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Roof framers and many other trades typically make daily use of triangular shaped framing squares known as speed squares. These trades include:. The contents of this booklet are incorporated herein by reference.

The primary reason for the popularity of speed squares is that they are small and lightweight making them suitable for replacing bulky framing squares and T-squares. A very common use for speed squares is to square scribe building materials such as lumber, roofing, and the like.

These tradesmen use speed squares to measure and mark the material then cut it as marked with a portable circular saw variously called worm drive, sidewinder, and contractor saw. These saws require frequent replacement of the blades. The blade is mounted to the saw by means of a threaded shaft that is adapted to mate with a hole in the center of the blade. To allow removal and replacement of these nuts, saw manufacturers supply a small rectangular steel plate having a wrench shaped opening on one end that corresponds in size to the dimension of the nut used to hold the saw blade onto the saw.

Tradesmen carry tools that they use daily on their person on belts or in pouches. Both because the small wrench for the saw is not used daily and because it is easily lost, the tradesman does not carry it. Further the wrench is not typically secured to the cord of the saw because it is common knowledge that the cord is often cut by abuse, misuse or overuse.

In fact the wrench is not commonly secured anywhere leaving it susceptible to loss. Worse, the tradesman may never see the wrench that was originally sold with the saw either because it is common practice to separate it from the box and manual or because the saw was purchased used, without its wrench. The effect of all this is to create a temporary crisis when the wrench is needed.

Typically the tradesman responds by using whichever available tool will accomplish loosening and retightening the nut in question in the changing of the saw blade. In fact, none may be available.

This is wasteful of both manpower and materials and increases the likelihood of both injury to the tradesman and damage to the saw. Working in situations where his auxiliary tools are relatively inaccessible exacerbates the problem. Such situations include both working high in a several-story building and when the tradesman must endure the elements to reach a helpful tool.

With the maneuvering of machines and material and with men facing deadlines, with the best of intentions a small wrench for a saw is likely lost and unavailable when needed. All of the above problems are simply solved by the incorporation of the appropriate wrenches in a tool that is always available. Also, since tradesmen carry a number of tools to the job site, the fewer the number of tools necessary to complete a piece of work the more productive is the tradesman.

Candidate tools for combining with the wrenches are: speed square, hammer, measuring tape, and snap line. The speed square is the optimal tool for incorporation of these wrenches. The reasons are as follows:. As pointed out above, the speed square is used daily almost universally among tradesmen as are the other candidate tools ,.

Among the candidate tools, only with the speed square does the positioning of the wrenches on the speed square allow the strong T-bar to function as a perfect lever for tightening and loosening of the saw nut retaining the saw blade, and. The wrenches are recessed and offer no catching surfaces to hinder withdrawal of the tool from, or return of the tool to, pouch, sheath, nail apron, or pocket, unlike the other candidate tools.

Speed squares are often mislaid, lost, or stolen. The invention provides a method for minimizing these problems. Speed squares contain markings along their edges for determining a number of functions relating to the laying out of rafters, stairs, and the like. If it were possible to incorporate into the design and construction of speed squares additional numerical scales the usefulness of these tools would be enhanced.

The invention, in one embodiment, consists of a speed square used for laying out work on building materials. Typically, the speed square comprises a three sided triangular flat plate, most often a right triangular flat plate, which is inscribed with units of measure.

A T-bar is fitted to, and extends substantially along the length of, an outer edge of one of the sides. The T-bar allows positioning the speed square against the edge of building material to be marked. The T-bar is positioned vertically and is divided equally into two areas by the outer edge of the side to which it is affixed. This is the most common configuration found in commercial speed squares.

In some cases the T-bar may be in the shape of an "L" see U. These L-shaped configurations are included within the term "T-bar" as used herein and in the claims. When the speed square is in the shaped of a right triangle, the T-bar is fitted to the outer edge of one of the 90 degree legs. The T-bar is a rectangular flat bar having a top, bottom, and ends. It is of greater thickness than the thickness of the triangular plate. Located on the top face of the T-bar is at least one nut engaging shaped opening near the end thereof.

Preferably there are two nut engaging shaped openings that are located at opposite ends of the T-bar. The combination tool is desirably fabricated from aluminum. This is the material of choice since it is structurally strong yet is lightweight. Steel, stainless steel or other materials may be used to fabricate the T-bar. When the speed square is fabricated from a soft material subject to frictional deformation, it is desirable that the said top face of the T-bar be fitted with a reinforcing plate made of steel or similar metal.

In the alternative, the speed square may be formed from toughened alloys taken from a class including: Al alloys Al Mg and Al-5Cr These and other high strength alloys would avoid the necessity of a reinforcing plate by making the entire speed square with wrenches of same material.

Where said reinforcing plate is used it should have a dimension corresponding approximately to the dimension of the said top face of the T-bar. When this feature of construction is used the reinforcing plate is usually fabricated from thin stock, which requires the nut engaging shaped opening extend at least through the reinforcing plate and preferably part way into the said T-bar.

When the speed square is aluminum the reinforcing plate is fastened to the bottom of the T-bar using such means as welding, rivets, screws, or adhesives. This general method allows the construction of the square to be of plastic while still providing high strength for the Wrench incorporated therein. Where construction is of plastic, a metal sleeve may be used which Would have the added advantage of providing for better resistance to wear at the pivot points on the ends of the T-bar.

As indicated, speed squares are easily lost, mislaid, or stolen. Theft of tools is currently so common that some contractors factor in stolen tools as a cost of business in each contract. To help solve this problem the invention contemplates each speed square and combination tool speed square would be painted with sharply contrasting colors of paint such as iridescent or daylight fluorescent paint.

Such color combinations include:. In another embodiment of the invention the other of said contrasting colors would show an on-site identification number for said tool in large lettering on one or both sides as well as the top face of the T-bar that projects outward away from the T-square.

Said identification number would consist of a combination of two or more alphanumeric characters. Said characters would be selected from among the capital letters of the English alphabet and the Arabic numerals. For clarity, one character from each pair of readily confused characters would not be used. With said identification number consisting of 2 alphanumeric characters selected from a set of 34 characters, the available combinations total 1, This would make duplication of identification numbers on a job site extremely unlikely.

The speed square needs to be recognizable as such at a great distance, even when partly obscured or in non-ideal weather or lighting conditions.

Further, the tradesman's own speed square needs to be identifiable as his own at 30 or 40 feet. It is in the shape of a right triangle having 90 degree legs 12 and The hypotenuse of the triangle is the third side It is evident that leg 12 is perpendicular to leg 14 whose bottom edge 18 terminates in T-bar 20 which extends the length of leg 14 and is centered with respect thereto.

The bottom 22 of T-bar 20, in a preferred embodiment of the invention, is fitted with a hard metal reinforcing plate having bottom 26 and ends 28 and 30 respectively. Positioned near the ends 28 and 30 are nut engaging openings 32 and 34 that are shown in FIG. The combined thickness of the bottom 22 of T-bar 20 and the reinforcing plate 24 should be sufficient to allow the nut engaging openings 32 and 34 to be of a sufficient depth to accommodate the length of the threaded circular saw shaft and the retaining nut that is fitted thereon not shown.

As shown in FIG. It is an important concept of the invention that the nut engaging openings 32 and 34 be near the end of the bottom of the T-bar.

This positioning allows maximum leverage to be exerted in the tightening and loosening of the nuts to the blade engaging shaft of a circular saw not shown. Contained along the outer edge 42 of leg 12 are inch markings Along edge 46 of the hypotenuse 16 are degree markings Markings 48 on one side of slot 40 are numbers used to measure hip and valley cuts. Markings 47, on the other side of said slot are used to measure common rafter cuts. Making the speed square out of plastic has the advantage over metal of constituting the speed square as lightweight, inexpensive, and flexible.

The disadvantage is that the plastic lacks the high structural strength to withstand the torque generated by incorporation of the said wrench.

To retain these advantages and eliminate the disadvantage we propose affixing a metal T-shaped open sleeve 50 to slidably engage with and affix to the T-bar 20 as shown in FIG. This sleeve or slot 50 allows the metal reinforcing plate 26 containing the nut engaging openings 32 and 34 not shown to be easily fastened to the T-bar 20 of the plastic speed square Adhesives or other fastening means are used to prevent movement of the metal sleeve The preferred embodiment illustrated in FIG.

Such identification can be read up to nearly 40 feet away and the speed square recognized as such up to feet away. Another preferred embodiment comprising slots marked with additional scales is depicted in FIG. The speed square 10 is of conventional design, although it may contain the wrench feature of the invention, and contains positioned near the center of legs 12, 14, and hypotenuse 16, slots 54, 56, and 58, respectively.

These slots are parallel to the outer edges of legs 12, 14, and the edge of hypotenuse The edge of hypotenuse 16 contains degree markings The outer edge of leg 12 contains common markings. They are dimensioned so as to receive a scribing device such as an awl or a pencil. These slots allow additional scales or numbers to be added to the speed square.

This is shown by the inch markings 60 on an edge 62 of slot A metric scale 64 is also added to the edge of slot

Swanson - speed square rafter square 12" Imperial

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US5575074A - Speed square - Google Patents

The aim of this tutorial is to provide an understanding of how to read two main scales on a speed square. A speed square is a tool that just about every carpenter will have in her bag. It can be used to make lines perpendicular square to a board's edge. And it can be used to mark any angle between 0 and 90 degrees across a board's face.

Speed square

Roof framers and many other trades typically make daily use of triangular shaped framing squares known as speed squares. These trades include:. The contents of this booklet are incorporated herein by reference.

A Speed Square rafter square, rafter angle square, triangle square is a triangular carpenters' marking out tool manufactured and sold by Swanson Tool Co. The Speed Square combines common functions of the combination square , try square , and framing square into one. 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. While the name is trademarked to Swanson, it has become a genericised trademark with most similar rafter squares being called speed squares.


The one number method developed by the. Swanson Tool Co. simplifies roof framing to where roofs are really framed as "easily as your studdings or joists.".


InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website. A framing square is a lot more than a simple square-cut saw guide. This simple device is crammed with tables, data and tricks that allow a carpenter to lay out roof rafters, stairs, or other building features. A carpenter's framing square includes tables stamped right into the tool itself.

He is the author or editor of over a dozen books on technology, DIY, and geek culture. While made for framing carpentry, a speed square can be indispensable in a lot of measuring and marking situations. The speed square was invented in by Albert Swanson.

If you've ever spent much time on a construction site or watching YouTube videos on making things, chances are you've seen a speed square. These triangular devices have been used by makers for decades. Originally invented by Albert J Swanson in , Swanson Speed Squares affiliate link have become a household name and it's the square that Dylan grew up learning to woodwork as well. If you are new to woodworking it can be daunting to figure out what tools you may or may not need.

US5575074A - Speed square - Google Patents

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