DT wrote:
says...

Started doing some repairs and painting of fascia and soffit but my
knees can't take going up and down a ladder. Would a 1X12X12 between
two step ladders work alright for scaffolding?

I = bh^3/12 = 11.25x0.75^3/12 = 0.396 in^4, s = 1000 psi, c = 0.375",
M = sI/c = 1055 in-lb = 6x12W = W = 15 lb.

A 2x12 will work fine...

I = 11.25x1.5^3/12 = 3.16 in^4, s = 1000 psi, c = 0.75",
M = 4219 in-lb = W = 59 lb?

Nick