When it comes to bridge decks, there are two main construction methods: welded and riveted.
Welded Systems
Welded systems are lighter and have a greater span capacity than riveted systems, making them a great choice for bridges with heavy traffic or long spans. Welded systems are also offered in two surface configuration meshes: diagonal pattern grids and rectangular pattern grids. Riveted grids are all diagonal patterned due to their riveted construction.
Open Grid (Riveted)
Open grid decks are the lightest decks commonly available for use as bridge decks, and they generally weigh between 15 and 35 psf. This makes them a great choice for bridges where weight is a major concern, such as movable bridges or bridges over sensitive environments.
Which One Do You Need?
So, which open grid deck is right for your bridge? It depends on your specific needs and requirements. If you need a lightweight deck with a high span capacity, a welded system is a good choice. If you need a deck that is both lightweight and easy to install, a partially filled grid system is a good option. And if you need a deck that is specifically designed for movable bridges or bridges over sensitive environments, an open grid deck is a good choice.