Flatbed trucking rates have surged over the past month as steel and lumber shippers hurry to stockpile inventory amid tariff whiplash threatening to roil their supply chains, experts say. A six-week increase in rates has led to the highest flatbed pricing to start a year since 2017, according to DAT, as freight repositioning combines with a typical seasonal pickup in construction and other industries. “Demand usually picks up in March and April as planti ng, building, construction, machinery imports, and nursery seasons gear up,” said DAT Principal Analyst Dean Croke. “…Last week, the average flatbed spot rate went up 4 cents to $2.13 per mile compared to the previous week. Meanwhile, the load-to-truck ratio for flatbed went up to 46.92 from 41.12 loads per truck.Shippers have pulled forward cargo imports such as machinery, lumber, metals and oversized flatbed freight to mitigate tariff uncertainty.