Complex sentence: Five riveted steel girders and a composite concrete deck support each carriageway, and the bridge was one of the first to use rubber bearings, and the first to use bitumen membranes lined with copper to make the decks waterproof.
Split into simpler sentences: Five riveted steel girders and a composite concrete deck support each carriageway. The bridge was one of the first to use rubber bearings, and the first to use bitumen membranes lined with copper to make the decks waterproof.