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Roof access is straight up though a hatch-way. A steel ladder was in the house, but not installed. The ladder has angle brackets protruding from one end at 90′ to the rails, parallel to rungs. I am assuming that these get bolted to the floor, but I can not figure how to affix the ladder without mounting at least one additional set of angles (maybe 2/3′s up) to screw to the wall. Yet, somehow this was previously in place. Any advice? Also, any suggestions for how far off the wall the ladder should sit for comfortable use? And could confirm that it is set straight up and not at angle?
Thank you