Greenbrier Cos. Inc. GBX said Thursday it has won orders for 15,300 new railcars valued at $1.9 billion. The Lake Oswego, Oregon-based railcar maker said the orders came in its fiscal fourth quarter through Aug. 31. The orders came from customers in various commercial sectors and spanned a range of railcar types, leading to the company’s biggest quarterly order count in almost a decade. “The diverse range of orders across railcar types exceeded Greenbrier’s expectations for the quarter,” Chief Commercial Officer Brian J. Comstock said in a statement. “It also indicates Greenbrier’s strength in our North American and European…