  We present a calculation of the complete electroweak O(alpha) corrections to
pp/ppbar -> W+/- -> l+/- nu (l=e, mu) in the Standard Model of electroweak
interactions, focusing on those corrections which do not contribute in the pole
approximation. We study in detail the effect of these corrections on the
transverse mass distribution, the W-width measurement, and the transverse mass
ratio and cross section ratio of W and Z bosons.
