MIL-T-19198A, MILITARY SPECIFICATION: TRAILER, PLATFORM, WAREHOUSE, 5TH WHEEL STEER, 20,000 POUNDS CAPACITY, SOLID RUBBER TIRES (29 JAN 1981) [SUPERSEDING MIL-T-19198]., This specification covers warehouse platform trailers, equipped with single 5th wheel steering, ring type drawbar, C type rear coupler, and solid rubber tires.