Is there a plugin for this?
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You can draw the first 'base' arc as explained by Jeff.
Draw a temporary base line representing the extent of the arc, draw the arc and type in the 'bulge' you want...
Erase the base-line.
Now you need to add a short temporary line to mark the extent of the second top arc.
So draw a vertical line, starting at the 'apex' of the base-arc and type in its length, let's say 9",
Now we need to mark the center point for the base arc as the top arc will share this as the arcs are parallel.
I've attached a script that adds a right-click context-menu 'Point at Arc Center' item if you have an arc/circle/polygon selected [it's the old @Last one with some tweaks of mine...] put it into Plugins and restart Sketchup to get the tool available to you... If you already have one use that ??
Use that to mark the center.
Use the circle tool to draw a circle centered on this cpoint snapping to the top end of the temporary 9" line we just added.
Erase the 9" line.
Draw in the rest of the stuff and erase the unwanted parts...
You can adjust the segmentation of the two arcs by selecting one and using Entity Info...
ArcContextmenu.rb -
@unknownuser said:
I am given the inside dimension, the arc height, the inner radius and the width (in this case, 44.25, 7.25, 37.77 and
although in this instance it didn't quite work out that way.Thats because you have to use the inside dimension and height and calculate the inner radius or use the inner radius and calculate the inside dimension. So I guess the question is which one of these is the most important.
The model referenced below shows the differences between the Arches using either the radius or the chord length.
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