I dont know what skills you are trying to cover, but the full length roof framer and the rafter book are both very good for roof framing. Fulllength roof framer a series of tables giving the full length of all rafters for any span for 48 different pitches. Gable roofs are built with all common rafters, as are shed roofs. Inspire a love of reading with prime book box for kids discover delightful childrens books with prime book box, a subscription that delivers new books every 1, 2, or 3 months new customers receive 15% off your first box. A hip roof, depending on the length of the building, has at least four common rafters. Visit the roof framing page for more information on cutting roof rafters, and visit the roof pitch calculator for determining rafter. The square has been redesigned with the addition of a full 90 degree scale, which will enable the user to mark any angle in degrees, as well as all the angles. Rafter span tables use these tables to determine lengths, sizes and spacing of rafters based on a variety of factors such as, species, load, grade, spacing and pitch. Weather youre building a shed roof or adding a dormer to your second story, it is important to choose the proper size rafter. The full length roof framer has rafter tables in half inch increments, giving roof pitches from 12 in 12 to 24 in 12. For a run greater than that given in the tables, add any two runs that will equal the desired run, then find the respective lengths for those two rafters and add them together. This will allow the hip seat notch to set in against a full.
This is the rafter length from the top cut to the seat plumb mark. How to layout and cut hip and valley roof rafters youtube. When framing a roof system, it is important to calculate the length of a roof rafter correctly. In typical rafter construction, outward rafter thrust is compensated for by using rafter ties and collar ties but is not eliminated. I would recommend buying this book along with the roof framers bible as a set. Includes result for hipvalley factor, slope factor and the roof slope in degrees. Use our online rafter length calculator to quickly compute the length of the shed roof rafter by entering the measurements of overhead, length of roof span, pitch or angle. Our roof rafter calculator tools are handy for calculating the number of rafters needed, rafter length calculator, lineal feet of rafter, board feed in ridge and subfacia,and the total board feet in the roof.
Also cuts and bevels for gable and cornice mouldings, accompanying each of the 48 pitches with illustrations. You put in the width and the pitch and this book will give you the full length of the rafter. It will help you with plumb and side cuts for hip and rafter, down and side purlin cuts and more. Determining rafter length by rise and run by roninohio. Swanson speed square 16 x 24 framing square starrett milwaukee circular saw. Pdf metric edition of full length roof framer free. Become a faster, more accurate, and more efficient roof framer with the rafter book. Full length roof framer the missing pages roof framing geometry. Rise and run means that a 612 pitch roof has 6 of rise vertical for each foot of run horizontal.
It will also ensure the structural integrity of the roof. How to calculate rafter lengths for gable, hip and valley. Buy full length roof framer by a f j riechers online at alibris. Structural workshop wrote an excellent post about rafter thrust and you can read it here our cabin roof has three sloped surfaces seen below which ill be referring to in this and future posts the main rafters on the rear of the cabin. Full length roof framer abebooks full length roof framer. An early settler and carpenter, born in 1889, by the name of augustus frederick john riechers wrote this book, full length roof framer, and obtained its first in 1944. Rafter is a sloping beam usually wood that supports a pitched roof. Publisher is not liable for errors or omissions in this book. Full length roof framer a series of tables giving the full length of. Using the 7 inch rise table and our 15 run, the common rafter length is 17 43. Understanding loads and using span tables revised and reprinted with permission from paul fisette using span tables to size joists and rafters is a straightforward process when you understand the structural principles that govern their use. Enter the value for the roof width outside to outside in feet, inches, and fraction, inches and fraction, or use the inches box to enter a value in decimals if that is your preference. Now we have compensate for a 2x ridge board which is 1 12.
Slope in 12 slope factor slope in 12 slope factor 3 1. The rest of the rafters in a hip roof are called hip and jack rafters. A modern handbook for roof framers by david mahin mcintire. According to library records, this happened right around the same time as dday, on june 6th, 1944, when allied forces landed on the beaches of normandy to fight for. This sizing guide for roof rafters will help determine what you need for your small project there are several variables to consider when determining the proper rafter size. Enter your mobile number or email address below and well send you a link to download the free kindle app. Irwin rafter square reference guide complete instruction book. Jack rafter for hip or valley to be marked 12xg inch, or same as main rafte,r and 12x 512 inches, as shown on fig. Shiften or swansons blue book richard birch and i are having a discussion on shiften.
A series of tables giving the full length of all rafters for any span, for 48 different pitches. Hes 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 swansons blue book that you get when you purchase their speedsquare. There are 144 rafter tables and 2,400 common rafter lengths and 2,400 hip rafter lengths per pitch to 18 of an inch. Hook your tape measure on to the rafter, and measure the diagonal rafter length that you calculated earlier. Full lentgh roof framer is a book full of rafter cuts, sheating cuts, rafter lengths,info on irregular roofs, ect both the estimator and carpenter will find this book handy. Roof cuts and rafter lengths by hancock boffins books. J riechers and the one thing that has always bothered me was the explanations drawings in the book. Full length roof framer has 2 available editions to buy at half price books marketplace. Full length roof framer the missing pages ive cut over a 1,000 roofs from the full length roof framer by a. Calculations for roof frames, roof cuts and rafter lengths. Metric edition of full length roof framer usedbook. This calculator helps you make the rafters of the suitable sizes required for your roofing. A full pitch roof is one having a 20dm rise for lm run.
Ive cut over a 1,000 roofs from the full length roof framer by a. This book not only gives you all the rafter lengths youll. Cuts and bevels for common, hip, valley, jack and purlin rafters. This rare pocketsized book comes hardbound with a cloth marker like a true bible. If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length.
All other rafters or braces not shown in cuts to be marked with. Cuts and bevels for common, hip, valley, jack, and purlin rafters. It seems that most of the others used a rafter length book, or some sort of book reference, to get the length of rafters, jack rafters, etc. Full length roof framer a series of tables giving the full length of all rafters for any span, for 48 different pitches. How to build the perfect cabin rafter the off grid cabin. When the rafter is installed, this toplong end will be at the peak of the ridge beam.
To get overall plumb to plumb length add overhang horizontal length to horizontal span. It gives rafter lengths for spans up to fifty feet for common, hip, and valley rafters. Use your pencil to mark the length directly on the rafter. Inch rise, run and the tables in the back of this book are all that are needed to layout rafter lengths and cuts for common, hip. This reference book was very valuable in determining the length to cut rafters in our new. The diagonal measurement is the full length of the rafter, minus the overhang. Calculate the length of a rafter from the roof slope ratio of inches per foot, and a building width measurement. This means that for every 1m the rafter travels horizontally, the angled length of the roof will be 1. Deduct half the thickness of the ridge from the span length this length is the correct measurement from the top plumb line to the birdsmouth plumb line. Also cuts and bevels for gable and cornice mouldings, accompanying each of the 48 pitches with illustrations ebook written by augustus frederick john riechers. This howto will guide you through the steps of calculating your roof rafter correctly. Determining roof rafter length conversion factors for roof rafters roof rafter length cutting a rafter birdsmouth.
Full length roof framer a series of tables giving the full length of all rafters for any span for 48 different pitches. The most useful book ever if you want to cut a roof. Full length roof framer as well as the book simplified roof framing by. I learned how to lay out roofs with a framing square. Riechers hardcover at the best online prices at ebay. Common rafters are, well, the most common rafter when it comes to residential roof framing.