will 393.207(b) put my truck out of service
Yes — more likely than not. Across 13 million inspections in our database, 393.207(b) has a 58.1% out-of-service rate. That means inspectors placed trucks out of service in 2,644 of the 4,553 all-time citations recorded. For context, the average OOS rate across all FMCSR codes is 31.4%, so 393.207(b) runs nearly double the national average. If an inspector spots a cracked, broken, or sagging frame, there is better than a coin-flip chance your truck is going nowhere until the repair is documented and cleared.