decking supplies

The bilevel car or double-decker is a design to solve the problem of increasing passenger capacity on railcars, without squeezing more (smaller) seats into the same space and/or decreasing the pitch (distance between seats).

If one couldn't add cars or increase the length of the car, the only possible direction for expansion is up. This is usually done by reducing the lower floor height closer to the rails and adding a separate upper level floor.

Because of the standard height of tunnels and overhead power wires, many double-deck trains set the bottom deck lower down, between the trucks (bogies in UK and Australasian parlance). Usually the entrance doors are above the bogies, and there is only one deck at the entance area. From there one can go upstairs or downstairs. Fire Rated Decking | Massaranduba decking, Redwood decking, Cumaru. For example, for the DD-IRM (see below) it is one step up from the station platform to the entrance, and from there seven steps up or four steps down. Some double-decker trains have their entrance doors on the lower level and no steps are needed to get to the lower deck.

France runs double-deck cars on heavily loaded high-speed TGV services and commuter lines such as the Paris suburban RER. The French loading gauge dictates that the double-deck cars have a maximum height of 4200 mm or 13'-9. 35".