The tolerance for tie wire length from target value is:

• A. ±0.25% of target value
• B. ±0.5% of target value
• C. ±0.75% of target value
• D. ±1% of target value

Answer: (D)

Tolerance sets how far a measured value can deviate from the target value and still be acceptable. For tie wire length, the specified tolerance is ±1% of the target length. This keeps wire lengths consistent enough for proper tying and connection while allowing the small, unavoidable variations that happen in the field.

Think of it this way: you target a certain length, and you’re allowed to go a little longer or shorter. If the target is 6 inches, the acceptable range is roughly 5.94 to 6.06 inches. If the target is 8 inches, it’s about 7.92 to 8.08 inches. This balance—tight enough for uniformity, loose enough for practical on-site work—makes ±1% the best fit.

Other options would either be too strict, making normal hand-cut tying fail acceptance, or too loose, reducing consistency. The ±1% tolerance provides a practical, standardized limit that aligns with field conditions and quality expectations.