Industry Standards for Passenger Transit, Rail Vehicle Specifications

Composite Panels


Plywood

Plywood is typically used in floor and partition panels. The plywood core is much more durable than the balsa core, and is frequently used in longer spans as a structural panel. The plywood core is typically covered with stainless steel for floor panels, or with melamine covered aluminum for interior panels.

Plywood comes in a variety of grades, which may vary in the panel construction. A typical panel may have a grade A veneer on one side, with a Grade B on the opposite side, and use grade C inner plies. For applications in transit vehicles where the plywood surface will be faced with a different material, an extrior grade B-B plywood is suitable. (The exterior grade will include grade C inner plies).

Standard: PS1-95, Voluntary Product Standard of the American Plywood Association (National Institute of Standards and Technology)
Purpose: This standard provides the requirements for producing, marketing, and specifying plywood for construction and industrial uses. (The specification value shown below requires exterior rated construction, with grade B faces, and grade C veneer underlying the B grade faces. This provides a suitable surface to bond the "skins" to.)
Criteria: Specify the standard name, selection criteria
Usage: APA PS1-95, Exterior Grade B-B, High Density Overlay