X frame

X frame

[′eks ‚frām]
(design engineering)
An automotive frame which either has side rails bent in at the center of the vehicle, making the overall form that of an X, or has an X-shaped member which joins the side rails with diagonals for added strength and resistance to torsional stresses.
References in periodicals archive ?
To pass this rigorous test, all Wiley X frames and lenses must be able to withstand repeated strikes from a .