National Safety Month (Posted June 27, 2017) Hit Next to start a quick roof safety quiz! 1. Recent OSHA studies show that __% of fatal falls happen when no fall protection is in place. 25% 50% 75% 90%2. OSHA defines a low-slope roof as a roof having a slope of less than __ inches of vertical rise for every 12 inches of horizontal length. 2 4 6 83. According to OSHA construction rules, fall protection is required at heights of __ feet or greater. 4 6 7 ½ 104. According to OSHA rules, an unprotected side or edge means a side or edge without a wall or guardrail system at least __ inches in height. 36 39 42 455. Covers for holes in a roof’s surface must be able to support: 300 pounds 500 pounds Twice the body weight of workers, equipment and material imposed on them 10 times the body weight of workers, equipment and material imposed on themTime is Up!