This construction worker has been asked to apply roofing material, probably shingles, over this sub-roof of oriented strand board (OSB). Yet the employer was either too cheap to but scaffold to work from, or rent a manlift, or even supply a harness and anchorage so the worker does not get injured if he falls. Why do tyou think the square hole was cut into the OSB? Hint: probably because the workers in above the length of a typical extension ladder and this is the employer's idea of "roof access". What else do you see that could cause a worker to fall