An oxidizer catalyst assembly for use in a fuel cell system for oxidizing anode exhaust gas and in which a first catalyst member is situated along a gas flow path and a second catalyst member is situated along the gas flow path following the first catalyst member. A pulling handle includes a rotating member with two side plates, each including first and second ends. The trailer further includes a suspension assembly that attaches to the deck once the deck is assembled or, alternatively, is permanently attached to one deck segment.