Braceable rail

A rail intended to be braced between and form-lockingly connected at each end thereof to two support members, comprising two substantially U-shaped sectional bars each having two leg portions and being formed of first and second contiguous segments with a region of transition therebetween, said first segments being wider in cross-section than said second segments, said bars being mutually nested with the respective leg portions thereof directed toward each other, whereby said leg portions in said first segment of each said bar embrace said leg portions in said second segment of the other said bar, each said region of transition including a latch surface, and said latch surfaces cooperating to exert an axially-directed force upon said bars for displacing said bars axially in opposite directions, wherein each said latch surface is plane and inclined with respect to the longitudinal axis of the respective said bar.