It might be cheaper (you would have to price them) to go get an aluminumloading ramp (Harbor Freight has some) and modify it than to try and build something. You could get the loading ramp (such as this one
http://www.harborfreight.com/1000-lb...amp-90799.html) screw some sheet aluminum to 1/2 of it and then glue some indoor-outdoor carpet to the aluminum sheet. Then you would be simply able to walk your dog up the ramp.
I will probably have to do something similar. I have a 107 lb 1/2 Doberman that has issues with stairs that he can see through. He is too heavy to pick up. I have to do the "put one foot in front of the other" trick and put a foot on a stair, then the other foot further up, then a back foot, then he can walk up once I get him going, It is sad, really sad........
If you have someone close that has a similar issue, you could go halves and solve the problem for each of you.
I taught our beagle to do the dog ramp atthe dog park this summer at the KOAon Hatteras Island, NC. It took a couple times showing her what to do, thenshe figured it out.
If you do build a ramp of some kind make you that somehow you fasten it so that it doesn't slide when your dog is going up or down, otherwise if shefalls that will be it, you will be carrying her up and down forever.
And since our beagle has some Bassett in herbackground and as such weighs 45 lbs, I would suspect yours is no lightweight.