Martin-Marietta Aggregates Rolling Stock Photographic Roster
Reporting Marks: MMAX Cars Numbered 300 - 399
AAR Class:
HT: Open top self-clearing car, having fixed sides and ends and bottom consisting of three or more divided hoppers with doors hinged crosswise of car and dumping between rails.
AAR Type:
H350
Detail Info:
Unequipped Hopper, Load Limit: 185,000 and greater, Non-rotary couplers
