Frame Jig Question

I'm getting ready to attempt my first project (a small mahogany runabout) with plans purchased from Clarkcraft.com. Looking at the frame setup diagram, I see reference to a building jig, but the measurments are not clearly defined.

Does anyone have/know of any links to pictures of frame jigs?

Thanks

 

There is a photo of a building jig here:
http://glen-l.com/methods/plywood/mthdpw01.html

Essentially, the two horizontals that the frames mount on must be level lengthwise and athwartship. The height needs to be enough for the frames to clear the ground. Could be higher, but at some point it would be difficult to work on the boat. Width is generally not critical, unless it is an inboard, in which case the spacing must be sufficient to fit the motor mount spacing (usually 22" to 26"). This is all based on the type of jig shown on the page referenced above. There are other ways to make a jig.
24" is a good spacing. Depending on the vee in the bottom of the boat, some frames may have to be notched into the stringers. Typically, a boat with a lot of rocker (sailboat) may have frames blocked above the horizontals, while others rest on or are notched into them.

 

Thank you Riddley. The link is perfect.