A building contractor is installing hurricane straps on a roof in Hilo. The structure experiences 130 mph design wind speeds. What is the minimum required uplift resistance for each strap connection?
Correct Answer
B) 1,800 pounds
For 130 mph design wind speeds, hurricane straps must provide minimum 1,800 pounds uplift resistance to adequately secure roof framing against wind forces.
Why This Is the Correct Answer
At 130 mph design wind speed, each hurricane strap connection must provide a minimum of 1,800 pounds of uplift resistance. This value is based on wind load calculations that account for the dynamic pressure exerted on roof framing at 130 mph and represents the code-required minimum for adequate structural connection.
Why the Other Options Are Wrong
Option A: 1,500 pounds
1,500 pounds is the minimum requirement for lower wind speed zones (approximately 110 mph). At 130 mph, wind loads are significantly higher and require the 1,800-pound minimum.
Option C: 2,100 pounds
2,100 pounds corresponds to higher wind speed requirements (approximately 150 mph or above). Applying this standard to a 130 mph zone would over-specify the connection but would not match the code minimum for 130 mph.
Option D: 1,200 pounds
1,200 pounds is inadequate for any residential hurricane strap application in Hawaii. It may represent a non-hurricane zone requirement and would be rejected by the building department for Hilo construction.
Memory Technique
130 mph = 1,800 lbs. Remember: 13 × 138 ≈ 1,800, or think '130 mph storms need 1,800 reasons to stay strapped down.'
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