This Guidance Note relates principally to the design and construction of deck-type and halfthrough skew bridge decks. Deck-type bridges, which comprise steel girders supporting a composite concrete slab at the top flange, are most frequently used for highways, whilst half-through decks are commonly used for railway bridges. For the purposes of this Note, a skew bridge is one where the longitudinal axis of the bridge deck is not square to the lines of its supporting piers and/or abutments. In the Note, the skew angle is taken as the angle between a line square to the supports and the longitudinal axis of the bridge. Thus the greater the skew angle, the higher (or more severe) the skew. Curved skew bridges are not covered.