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Building a Queen Post Bridge

Building - Cutting

Cutting the Gusset Plates

Clamp one end of the 36" x 3" x 1/16" piece of Balsa and use the combination square to draw a line down the middle.  Then trace the line with an Xacto knife until you have cut all the way through.

Cutting the Vertical Hips

You will wind up cutting the same pieces over and over again.  In order to make sure the pieces are cut identically, it is helpful to have a template.  You can make a simple "Vertical Hip" template by sawing off a 6 1/2" piece of wood from one of your 1/2" x 1/2" x 36" pieces of balsa wood.  Use this template to create 4 "Vertical Hips".

Creating an End Post Template

You can create an "End Post" template in three steps.  First, place the 1/2" x 1/2" x 36" piece of wood over your design drawing.  Then mark where the wood meets the top of the bottom chord and both the bottom and the top of the top chord.  Second, place the piece in the miter box and saw along the outermost lines.  You will have to use the 45 degree slot to do the cutting, even though the angle will not be 45 degrees.

Finally, cut a 1/4" notch in the "End Post". This notch will let the "End Post" wrap around the top chord.  It is easier to cut the slot if you put scrap wood pieces in the miter box to make sure you do not cut too deeply.  Be sure to save the "diamond" piece you cut out of the end of the template.  It is used as a template too!

Cutting the End Posts

Use your big template to cut out 4 end posts.  Use the small diamond piece to measure where to cut the notch.