According to the rule of thumb, which clearance is recommended for impact curtains?

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Multiple Choice

According to the rule of thumb, which clearance is recommended for impact curtains?

Explanation:
The main idea is choosing a practical gap around the curtain so it can function properly without rubbing, snagging, or failing to stop debris. The recommended spacing is 12–18 inches because it gives enough room for the curtain to move, sag, and absorb impact without contacting walls or equipment, while still maintaining a barrier against heat, smoke, or debris trying to pass through. A smaller gap tends to cause friction, wear, and binding as the curtain shifts under load or wind. A much larger gap reduces the curtain’s protective effectiveness by creating a bigger opening for hazards to bypass the barrier. Keeping the 12–18 inch clearance strikes a balance between reliability and protection.

The main idea is choosing a practical gap around the curtain so it can function properly without rubbing, snagging, or failing to stop debris. The recommended spacing is 12–18 inches because it gives enough room for the curtain to move, sag, and absorb impact without contacting walls or equipment, while still maintaining a barrier against heat, smoke, or debris trying to pass through. A smaller gap tends to cause friction, wear, and binding as the curtain shifts under load or wind. A much larger gap reduces the curtain’s protective effectiveness by creating a bigger opening for hazards to bypass the barrier. Keeping the 12–18 inch clearance strikes a balance between reliability and protection.

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