When support discs are properly spaced, what should the effective pendant height be?

When support discs are properly spaced, what should the effective pendant height be?

• A. 2 1/2 inches above the runway surface
• B. 1 inch above the runway surface
• C. 3 inches above the runway surface
• D. 2 inches above the runway surface

Answer: (A)

When you space the support discs correctly, the bottom of the pendant should sit about 2 1/2 inches above the runway surface. This specific clearance is set so the pendant stays well clear of any equipment or traffic on the runway and maintains proper tension and sag in the system. If the height were smaller, there’d be a risk of contact; if larger, the setup would no longer match the intended design. So the proper, standard height is 2 1/2 inches above the runway surface.

When you space the support discs correctly, the bottom of the pendant should sit about 2 1/2 inches above the runway surface. This specific clearance is set so the pendant stays well clear of any equipment or traffic on the runway and maintains proper tension and sag in the system. If the height were smaller, there’d be a risk of contact; if larger, the setup would no longer match the intended design. So the proper, standard height is 2 1/2 inches above the runway surface.