tag:blogger.com,1999:blog-6261993076995357307.post4253665480087277626..comments2023-11-05T06:16:56.961-05:00Comments on the Carpentry Way: Following Mazerolle: "Théorie Des Devers De Pas" (II)Anonymoushttp://www.blogger.com/profile/14328401081765407624noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-6261993076995357307.post-51620982349724279592011-05-16T16:50:40.248-04:002011-05-16T16:50:40.248-04:00Rob,
good work. The fun never really ends with la...Rob,<br /><br />good work. The fun never really ends with layout. Look more closely at how the footprints and the cross-section relate - you will see a projection line or two that relate individual faces to/from the footprint.<br /><br />~CAnonymoushttps://www.blogger.com/profile/14328401081765407624noreply@blogger.comtag:blogger.com,1999:blog-6261993076995357307.post-33075123397523927582011-05-16T15:44:21.360-04:002011-05-16T15:44:21.360-04:00Chris,
Thanks, that was good advice. I studied le...Chris,<br />Thanks, that was good advice. I studied leg K-D and managed to reproduce your drawing of that part. First using pure "X Marks..." and then as you have done it. The difference being that in "X Marks..." the elevation triangle is shifted out of the way of the stick, whereas here the base line of the triange lies along the "radial" line of the leg. The latter method requires very careful work to get the perpendicular projections right !<br />I started from the cross-section which I twisted a guessed amount. This meant my footprint did not line up with the eave. So another execise is in store.<br />RobRobhttps://www.blogger.com/profile/10759613066228344845noreply@blogger.comtag:blogger.com,1999:blog-6261993076995357307.post-16493480513763096542011-05-15T13:20:40.664-04:002011-05-15T13:20:40.664-04:00Rob,
actually, looking at the first post in the s...Rob,<br /><br />actually, looking at the first post in the series, I see I didn't spend much time at all explaining that hip development. I'll take up that issue in some future drawing series I imagine, so the above two posts will have to suffice for now. <br /><br />In post 1 of this series, careful study of picture 1, leg K~D, will perhaps prove informative. Not all the lines are present on that drawing for all members, in the interest of clarity, but leg K~D shows the method well enough I think.<br /><br />~ChrisAnonymoushttps://www.blogger.com/profile/14328401081765407624noreply@blogger.comtag:blogger.com,1999:blog-6261993076995357307.post-39012999873877682942011-05-15T13:15:11.108-04:002011-05-15T13:15:11.108-04:00Rob,
thanks for your comment, and your work in st...Rob,<br /><br />thanks for your comment, and your work in studying this topic is to be congratulated. <br /><br />Yes, the third figure above shows the very same method as seen in the 'X Marks the Spot' series for determining the actual cross section of the stick required to produce the correct meeting with the floor (or plan view): one takes the line of the stick at slope, imagines a cross-section of that stick, and then swings it down onto the ground. in the 'X Marks the Spot' series we took it as a given that the two sticks are to be square in section - in the above method, we presume that the sticks will be shaped so as to fit against the irregular hexagonal cone, in both roof surface and floor plan, that we have established.<br /><br />The method of swinging a perpendicular to the slope line of the stick down so as to establish the cross-section of the stick is common to the layout of regular hip roofs and even sawhorses as well. <br /><br />In some cases you will know ahead of time which cross section of piece you want to employ for that hip rafter, or sawhorse leg, and need to figure out how that meets the ground (or, say, the wall plate), and in other cases you know what sort of roof surface and wall plate configuration you are working with and need to establish the correct section of stick which will conform to that. <br /><br />The same drawing method essentially serves for both objectives, though when you are needing to obtain the hip section (and don't know quite what it will look like) some added projection lines are required to produce it. If you study post 1 in the above series I deal with that projection a bit more in detail.<br /><br />~ChrisAnonymoushttps://www.blogger.com/profile/14328401081765407624noreply@blogger.comtag:blogger.com,1999:blog-6261993076995357307.post-86107771508898282192011-05-14T12:36:43.845-04:002011-05-14T12:36:43.845-04:00After studying the "X Marks the Spot" bl...After studying the "X Marks the Spot" blog series from Chris (from Nov 2010 onwards), I thought I had from-cross-section-to-footprint under the belt.<br /><br />Returning to this series, I see something rather (?) different: the edges of the cross-sections and the footprints are joined by converging construction lines,<br />going off in all directions - even off the page ! Chris, could you give some idea how these construction lines are developed, please ?<br /><br />Later comment: Looking again at the 3rd figure, I do see a familiar arc and what looks like part on an elevation. May be this is a variation on the "X Marks ..." method ?Robhttps://www.blogger.com/profile/10759613066228344845noreply@blogger.com