Architectural Elements
Classical Pediments
(triangular, Circular, Broken) & angled mutules & modillions in pediments
My Data\Architecture\Steps-Create-a-raking-cornice My Data\Work\SketchUp Tips\Create a raking cornice This is how I discovered how to create a 'raking' cornice for a Classical Pediment. Note that I haven't tested it out yet with any broken or curved pediments yet. I discovered this while working on my project 'Serlio.Doorcase.page296'. First create your cornice profile to the way you like. Note that the cornice profile will have three top members: a fillet at the very top (flat top and face), a curved member (usually a cyma recta, but possibly a cavetto or ovolo), and a fillet underneath it (most likely a part or above another curved member). Also note that the bottom fillet mentioned above will be 'split' at the ends of the pediment, with one part continuing as the topmost member of the straight part of the pediment and the other part continuing up as the bottommost part of the angled pediment. Now you want to copy the profile to use just for the pediment area, and create several separate profiles: 1: the bottom part of the standard cornice up to and including the fillet under the topmost curved member (this will run across the bottom flat part of the pediment); 2: the fillet at the top of the previous part (which will run across the bottom of the angled pediment); 3: the curved member (forming the main 'decoration' of the angled pediment profile); 4: the topmost fillet (which is usually thought of as part of the cyma recta but needs to be treated separately for the raking cornice to work). Note that the top and botom fillets don't necessarily need a 'profile' as a group or component, you could manually draw the necessary lines to form these elements. Run your bottom cornice profile over the length of the area to be covered by the pediment (if the pediment is a temple type where it forms the ends of an entire roof then run this bottom cornice all the way around; otherwise we just need the area where the 'raking' cornice touches a standard cornice). Place your 'curved member' profile at one end of the area it needs to cover, and make it a unique group or component (note that it will be sitting on top of the bottom fillet we mention above). Measure the distance you need for your pediment to be (there are seveal methods, you can choose which you want). What you need is the distance from the top of the fillet on the top of the flat front of the pediment to the bottom of the same fillet at the 'crown' of the pediment. Run your bottom fillet profile (or draw the necessary lines/faces) up the angled pediment, so you now have a 'base' to place your curved member. Open your curved member group/component, and trace the edges of the angled fillet you just created (or copy and paste in place). Using these edges run 'follow-me' with the curved member profile face selected. SketchUp will intelligently create the proper connections for the 'angled' curved member where it joins the 'vertical' curved member. Now you can run your top fillet (or draw the necessary lines/faces) up the outside edges of the curved member you just created (usually easier to draw as you most likely creating a 'roof' element anyway at this point). At this point you can then run your bottom cornice profile up the inside of the pediment (you don't need to worry as much as the problem with the raking cornice is virtually non-existent here). Need to verify the above paragraph!