Construction safety, fall hazard: Worker climbs built in ladder of welded tubular scaffold. Two positive safety factors: (1) vertical support extends above top platform, which allows worker to continue climbing vertically until reaching the platform with his feet to easily step onto the platform (instead of scrambling over the edge if the extension is not present). (2) Worker carries no tools in his hands, so he has full use of both hands and feet to safely climb ladder. Tools and light materials can easily be pulled up with a light rope once worker is standing on platform. A significant unsafe factor is the scaffold built in ladder ascends 6'-4" with 4 steps = 19" per step, which has distance between steps greater than 16 3/4" allowed by OSHA standards. Ann Arbor, 2004.