When I do get to the interiors portion of presentations, I'm definitely going to have to learn how to properly make those rafters if anything varies from the general beam and beam system designs. Over all, I ended up with the attached picture so I could use it as a color samples example for a client meeting and Planning Approval color sample submittal. So I decided to cut the custom rafter family to a 24" exposed tail only and inserted it at the plate height. I had also created a custom rafter family with the Generic template (sadly my parameters skills need honing because I couldn't specify a distance and they wouldn't trim to each other when I mirrored them).
I then increased the roof base offset by the cut thickness of the 4x8 rafter. I did end up creating a roof system with the roof tool, giving all the thicknesses of the T&G, 2圆 framing, sheathing and roofing finish. Thu, at 2:53:02 PM | Custom Rafter Tails & Roof in Revit 2012
All of the 2X and T&G would be detail elements. You could model this as one roof with all the layers then add a void to cut out the tail area and add modeled rafters or just rafter tails. How much is modeled and how much is detail? It is common practice to install rafters with the ends running long, then cut them later.Thu, at 7:15:33 AM | Custom Rafter Tails & Roof in Revit 2012 If you plan to have an overhang on your rafter tails, the rafter length will be longer. It is the length of a line beginning at the inside of the Birdsmouth drawn parallel to the edge of the rafter. Note that this is not the actual end-to-end length of the rafter. Rafter Length - The rafter length result from this calculator represents the Line Length of the Rafter(L). The angle information is valuable when performing roof framing tasks using tools that are not roof-pitch calibrated, such as the Bevel on a circular saw, which is degrees calibrated. The roof pitch calibrations on a Speed Square are also used for quickly marking the pitch cut angles on the head and tail ends of rafters.Īngle - Angle(A) is the roof's Pitch(X) represented in degrees. I added a miter cut (or clip cut) because I enjoy it whenever I see each. From a design perspective, it’s pleasing to view, and the semicircle is an uncommon pergola detail. That one’s a swooping semicircle combined with a miter cut. If you know a roof's Pitch(X), you can use the information to lay out rafters with a Framing Square. I gave lots of thought to the simple rafter tails in my pergola how-to article in PM’s May 2009 issue. Pitch/Slope - Pitch and slope, often used interchangeably on the job site, refer to a roof's Pitch(X) represented as X in 12, where X is the number of inches of vertical rise for every 12 inches of horizontal run. Roof Pitch Calculator Results (Explained) The roof pitch chart is a visual representation of the actual slope of a roof, given the roof's Pitch(X)/Angle(A). Select this option if you know the rafter's Rise(M) and the roof's Pitch(X) and need to determine the Run(R) of the rafter. Run(R) - This option places the Rise(M) and Pitch(X) fields into the Input section and moves the Run(R) to the Results section. Select this option if you know the rafter's Run(R) and the roof's Pitch(X) and need to determine the Rise(M) of the rafter. Rise(M) - This option places the Run(R) and Pitch(X) fields into the Input section of the calculator and moves the Rise(M) field to the Results section. The Pitch(X/12) represents the number of inches of Rise(M) for every 12 inches of Run(R). Pitch(X) - This option (the default) places the Rise and Run fields into the Input section. Save the hassle of figuring out the dimensions of a tail cut you want by using our preset templates, which are available for anything from 2x4 through 2x14 in size.
The Roof Pitch Calculator Input Options (Explained) Adding a fancy design to the tails of the beams, rafters, and purlins of your pergola adds a finishing touch to the structure. To determine the ( Y) height, measure from the inside of the Birdsmouth up the calculated Pitch (X in 12) to the top of the rafter. To determine the finished height of the Ridge Beam, add the Rise ( M) and the ( Y) height.