David:

That's exactly what I was planning on doing, 'cept I figure that my hinged plank will be 16' long x 48" wide. I was planning on using three 2x10's as stringers running the 16' length. With the likely probability of snow on it, I don't think a slope greater than 3:1 will be easy to walk on. I'm concerned if I use 2x8's as stringers the plank will have too much bounce in it.

How long is your hinged "plank"?

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