Explanation: The Effective Length of a Fillet Weld The effective length of a fillet weld is a critical design factor to ensure the structural integrity of welded connections under loading conditions. As per the design specifications, the effective length of a fillet weld must meet a minimum requirement to ensure the distribution of load across the weld. According to the given statement, the effective length of a fillet weld designed to transmit loading shall NOT be less than four times the size of the weld.