1. Understanding the "Sail Effect"

When you hang a banner, an LED wall, or even a tight mesh on a truss, you are creating a sail. Wind pressure is not linear; it increases exponentially as the wind speed increases.

• The Physics: If you double the wind speed, the force on your structure doesn't just double—it quadruples.

• The Surface Area: Even a "transparent" mesh screen can catch up to 30-50% of the wind. Never assume wind will simply "blow through" your rig.

2. Overturning vs. Sliding

Wind creates two specific types of failure that your ballast must counter:

1. Overturning: The wind pushes the top of the truss, trying to pivot the whole structure around the base. The taller the truss, the more "leverage" the wind has.

2. Sliding: The wind pushes the entire structure horizontally across the ground.

Educational Tip: To prevent sliding, you need friction. To prevent overturning, you need mass and a wide footprint. EZ BLOCK’s heavy steel design addresses both by providing high density in a small, bolt-down footprint.

3. The "Wind Action Plan" (Industry Best Practice)

Every professional event should have a pre-defined Wind Action Plan. We suggest educating your team on these three thresholds:

• Level 1 (Monitoring): At 15-20 mph, designate a safety officer to monitor gusts.

• Level 2 (High Alert): At 25-30 mph, prepare to lower high-drag items (LED walls/banners).

• Level 3 (Evacuation): At 40+ mph (or the structure's rated limit), clear the area.

4. Technical Rule of Thumb: The "1.5x Rule"

While you should always consult a structural engineer, a common industry starting point for safety is to ensure your Restoring Moment (the weight of your ballast multiplied by the distance to the pivot point) is at least 1.5 times greater than the Overturning Moment (the wind force multiplied by the height of the sail).