Concrete Filled Steel Grid Deck

Unfilled steel grid typically 7 5 cm to 13 cm 3 to 5 2 deep with a 9 cm to 13 cm reinforced concrete slab on top of it.

Concrete filled steel grid deck.

A por tion of the grid extends up into the reinforced concrete slab making the two composite. Over 380 000 sf of partial depth concrete filled steel grid deck which will be replaced in three stages. Concrete filled steel grid bridge decks have the answer. Steel hybrid decks consist of an open grid deck and full depth precast deck panel.

The partially filled grid decks involve casting concrete for the lower section of the deck and including the open grid. Notable features of project. Common configurations shown in the design table can span up to about 15 feet but other wt main bar sizes can be used to achieve longer spans. Later the rest of the deck will be poured on site.

The concrete portion of an exodermic deck can either be cast in place the grid panels act as rapidly erected formwork or. Concrete filled steel grid decks have been used in many major bridges such as the walt whitman bridge 1956 mackinac straits bridge 1957 verrazano narrows bridge 1964 and others. Decks open grid decks. Open grid decks can be described as small scale steel framing systems used as a bridge deck.

The most common cause of bridge deck distress is the corrosion of the reinforcing steel that results from the intrusion of chlorides into the concrete after repeated deicer applications. Decks concrete steel hybrid decks. Original grid deck was in service for 70 years prior to replacement with an annual traffic volume of approximately. Foster s lightweight yet strong open steel grid flooring is the answer for movable bridges or other conditions where minimizing dead load is a major consideration.

The exodermic decks involve the same process as the partially filled grid decks except that a majority of the concrete is placed above the steel grid. Oldest of the seven toll facilities operated and maintained by the mdta.