Carpentry and Woodworking - Framing with an acute angle

I am about to frame a ramp for an emergency wheelchair exit for a neighbor. The height of the frame is 10 1/2 ". The length of the 'floor' (level) leg is 59 1/2". The length of the ramp (sloped) leg is 60 7/16".

The problem I am having is dealing with the acute angle that occurs as a result of the slope of this 'triangle'. There is a 90 degree angle at the 'back/bottom' part, an 80 degree angle at the 'top' (highest) part, and a very extreme 10 degree angle at the 'front' (lowest) part.

What is the best way to cut the lumber and frame this when given a 10 degree acute angle such as this? (I have a 10" sliding compound miter saw, a circular saw and table saw to use).

Thank you in advance.


TnGuy

Framing square and skilsaw. Occasionally I'll cut sharp angles on the tablesaw freehand by just following the line I've marked. (like the sharp point of your ramp stringer.)

Cut the ramp joists the length you want them to be. Set one end on top of the frame with the bottom of the joist at the edge. Measure your frame from the bottom to the top and cut a scrap piece of wood that length and rest the outside end on that piece of wood. Take a level and mark a level line from the top of the joist at the free end. This will give you the proper angle to cut. You will probably have to cut it with a circular saw. While you have the joist sitting on the ledger and on the block you cut, make a vertical level line on the opposite end of the joist (the one sitting on the deck). When you take out the cut blocking, the joist should fit snugly to the rim joist of the deck and sit flat on the ground, or on blocks, whichever you are using as a base.