American Trestle Study
Stereotomy Geometry
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American Trestle Study
Stereotomy Geometry
This book, HG-III Pro, is a supplement to the book The Art of the Line for Carpentry Stereotomy Geometry. This American Trestle Study has two four-legged trestles, fourteen Tréteaux de Buenos Aires, numerous examples of twisted crosses, and different Stereotomic techniques for laying down the scribe lines on net planes. You should basically be intermediate or advanced in Stereotomy or have a good comprehension of the Stereotomy presented in the book The Art of the Line for Carpentry Stereotomy Geometry. Net planes are the easiest way to lay down the scribe lines for trestles, and this book only uses net planes to lay down the scribe lines for the material placed on the net plane. Scribing the material laid on the net plane, following one edge of the trestle leg or cross, is called Rembarrement in French. You will scribe the lines on the material then use your bevel square, Sauterelle, to transfer the scribe lines to the other edges of the material. The net plane for rafters or hip rafters is usually referenced as an elevation view. However, it is also a net plane. The first basic rule of a net plane is that the net plane will be perpendicular to the axis of rotation to the footprint line. The footprint line is referenced as FPP, where the footprint line is one edge of the footprint plane, FPP.
This book uses the BEPL technique to locate some of the Stereotomic lines. Sometimes it feels like using Voodoo to draw out the BEPL Triangle in complex drawings, while at other times, it's redundant because all of the BEPL lines are already in the drawing. Theoretically, you could have 24 BEPL lines in one drawing of two crosses intersecting. So, most of the drawings in this book only show one cross Stereotomic drawing at a time. In the drawing below, the same drawing from the previous page, the BEPL Triangle, is drawn out. It's redundant in this drawing, since the BEPL lines are the same as the FPP lines. However, for the BEPL technique to work in complex drawings, it must also work correctly in simple drawings. It's also an easy way to visualize the location of the BEPL Triangle.
It would be great to say using the BELP technique was basically drawing the scribe lines by connecting the dots. However, it requires a solid visualization skill of deciding what FPP lines intersect with the BELP lines.
Key Words for this American Trestle Study Moon Walk Lines Dark Side of the Moon Lines Rembarrement Sauterelle Profile Slope Net Plane Profile Net Plane FPP - Footprint Planes S-FPP - Secondary Footprint Lines Technique Dihedral Triangle Dihedral Triangle Perpendicular Bisector Line Material Block Rotation Footprints FPP-Bisector Line Up Bevel Seat Line on Net Plane Down Bevel on Net Plane Trace Lines - Scribe Lines Symmetrical Non-Symmetrical BEPL - Bottom Edge Plane Lines The Cat in the Hat Beard - Barbe Bear - Claw Hat Necktie Square Across Technique
ISBN's
- First Edition 978-1-0983 819-4-3