How many supports are required on E-28 wires, given 300 ft of runway width?

How many supports are required on E-28 wires, given 300 ft of runway width?

• A. 10 supports
• B. 12 supports
• C. 14 supports
• D. 16 supports

Answer: (C)

The correct answer is based on the requirement for the spacing of supports for E-28 wires along a runway. According to standard guidelines, the spacing for supports is typically determined by the width of the area being covered—in this case, the 300 ft runway width. For E-28 wires, the common practice is to place supports at distances that ensure proper tension and stability of the wires. In general, it's common to have one support for every 25 feet of the runway width. Therefore, when dividing the total width (300 ft) by the spacing distance (25 ft), you arrive at a calculation of 300 ft divided by 25 ft, which equals 12 supports. However, it's important to account for the fact that typically, wires must be anchored appropriately at both ends, and additional supports may be required to ensure stability and compliance with safety regulations. Thus, the practice in many operational contexts is to include supplemental supports to prevent sagging or instability under operational conditions. This reinforces the conclusion that a total of 14 supports might be necessary to ensure that the E-28 wires are adequately supported across the entire width of the runway, taking both initial spacing and additional safety measures into account. Therefore, 14 supports is the appropriate answer.

The correct answer is based on the requirement for the spacing of supports for E-28 wires along a runway. According to standard guidelines, the spacing for supports is typically determined by the width of the area being covered—in this case, the 300 ft runway width.

For E-28 wires, the common practice is to place supports at distances that ensure proper tension and stability of the wires. In general, it's common to have one support for every 25 feet of the runway width. Therefore, when dividing the total width (300 ft) by the spacing distance (25 ft), you arrive at a calculation of 300 ft divided by 25 ft, which equals 12 supports.

However, it's important to account for the fact that typically, wires must be anchored appropriately at both ends, and additional supports may be required to ensure stability and compliance with safety regulations. Thus, the practice in many operational contexts is to include supplemental supports to prevent sagging or instability under operational conditions.

This reinforces the conclusion that a total of 14 supports might be necessary to ensure that the E-28 wires are adequately supported across the entire width of the runway, taking both initial spacing and additional safety measures into account. Therefore, 14 supports is the appropriate answer.