How far above the runway should the centerline of the fairlead beam be projected?

How far above the runway should the centerline of the fairlead beam be projected?

• A. 1 foot
• B. 6 inches
• C. 2 feet
• D. 3 feet

Answer: (A)

The key idea is ensuring there is enough vertical clearance for the hoisting line to pass smoothly over the fairlead without contacting the runway or getting snagged, even when the line is under load and has some sag. Setting the centerline of the fairlead beam one foot above the runway gives that safe clearance while keeping the line’s entry and exit angles within a practical range for control and wear. If it’s too low, the line could rub the runway or strike the surface during operation; if it’s too high, the line angle changes, which can affect load handling and the efficiency of the hoisting setup. One foot strikes a practical balance, which is why it’s the best choice.

The key idea is ensuring there is enough vertical clearance for the hoisting line to pass smoothly over the fairlead without contacting the runway or getting snagged, even when the line is under load and has some sag. Setting the centerline of the fairlead beam one foot above the runway gives that safe clearance while keeping the line’s entry and exit angles within a practical range for control and wear. If it’s too low, the line could rub the runway or strike the surface during operation; if it’s too high, the line angle changes, which can affect load handling and the efficiency of the hoisting setup. One foot strikes a practical balance, which is why it’s the best choice.