A chassis for a vehicle, the chassis having a major, length dimension (Lc) and minor, width (Wc) and height (Hc) dimensions, and including a pair of beams spaced apart in the width dimension (Wc) of the chassis, each beam extending in a length dimension (Lb) of the beam for at least most of the length dimension (Lc) of the chassis; each beam including a pair of side plates spaced apart in the width dimension (Wc) of the chassis and connected together by at least one web (4, 5), the at least one web (4, 5) extending between the side plates in the length and width dimensions (Lc, Wc) of the chassis; each side plate having a major, length dimension (Lp) in the length dimension (Lc) of the chassis, a minor, height dimension (Hp) in the height dimension (Hc) of the chassis, and a thickness (Tp) in the width dimension (Wc) of the chassis, the length dimension (Lp) of each side plate extending for the full length dimension (Lb) of the beam; the side plates and the at least one web (4, 5) together being configured to transmit along the beam in the length dimension (Lc) of the chassis at least most of a bending moment applied by a load to the beam in the height dimension (Hc) of the chassis; at least one said beam further including at least one suspension mount configured for connecting the beam to a suspension member of the vehicle to transfer loads to the suspension member; wherein the suspension mount extends between the side plates of the respective beam and connects the side plates together; the chassis further including a crossmember, wherein the crossmember extends between the beams of the chassis and is connected to a respective one of the side plates of said respective beam proximate the suspension mount; characterised in that the crossmember includes first and second crossmember plates (41', 41") extending in the width and height dimensions (Wc, Hc) of the chassis and spaced apart in the length dimension (Lc) of the chassis; and the suspension mount includes first and second mount bodies (11', 11") spaced apart in the length dimension (Lc) of the chassis, each mount body (11', 11") extending between the side plates of said respective beam in the height and width dimensions (Hc, Wc) of the chassis; and the first crossmember plate is connected to said respective one of the side plates of said respective beam proximate the first mount body, and the second crossmember plate (41") is connected to said respective one of the side plates of said respective beam proximate the second mount body (11"). a pair of beams spaced apart in the width dimension (Wc) of the chassis, each beam extending in a length dimension (Lb) of the beam for at least most of the length dimension (Lc) of the chassis; each beam including a pair of side plates spaced apart in the width dimension (Wc) of the chassis and connected together by at least one web (4, 5), the at least one web (4, 5) extending between the side plates in the length and width dimensions (Lc, Wc) of the chassis; each side plate having a major, length dimension (Lp) in the length dimension (Lc) of the chassis, a minor, height dimension (Hp) in the height dimension (Hc) of the chassis, and a thickness (Tp) in the width dimension (Wc) of the chassis, the length dimension (Lp) of each side plate extending for the full length dimension (Lb) of the beam; the side plates and the at least one web (4, 5) together being configured to transmit along the beam in the length dimension (Lc) of the chassis at least most of a bending moment applied by a load to the beam in the height dimension (Hc) of the chassis; at least one said beam further including at least one suspension mount configured for connecting the beam to a suspension member of the vehicle to transfer loads to the suspension member; wherein the suspension mount extends between the side plates of the respective beam and connects the side plates together; the chassis further including a crossmember, wherein the crossmember extends between the beams of the chassis and is connected to a respective one of the side plates of said respective beam proximate the suspension mount; characterised in that the crossmember includes first and second crossmember plates (41', 41") extending in the width and height dimensions (Wc, Hc) of the chassis and spaced apart in the length dimension (Lc) of the chassis; and the suspension mount includes first and second mount bodies (11', 11") spaced apart in the length dimension (Lc) of the chassis, each mount body (11', 11") extending between the side plates of said respective beam in the height and width dimensions (Hc, Wc) of the chassis; and the first crossmember plate is connected to said respective one of the side plates of said respective beam proximate the first mount body, and the second crossmember plate (41") is connected to said respective one of the side plates of said respective beam proximate the second mount body (11").