Double Stacking

Some articles on double:

Freight Rail Transport - Containerization - Double-stack Containerization
... built with sufficient vertical clearance, a double-stack car can accept a container and still leave enough clearance for another container on top ... This usually precludes operation of double-stacked wagons on lines with overhead electric wiring ... with overhead wiring from the start, has been built with tunnels that do accommodate double-stacked wagons so as to keep the option to economically rebuild the route ...

Famous quotes containing the words stacking and/or double:

    The Universal Soul, as it is called, has an interest in the stacking of hay, the foddering of cattle, and the draining of peat-meadows.
    Henry David Thoreau (1817–1862)

    ... the next war will be a war in which people not armies will suffer, and our boasted, hard-earned civilization will do us no good. Cannot the women rise to this great opportunity and work now, and not have the double horror, if another war comes, of losing their loved ones, and knowing that they lifted no finger when they might have worked hard?
    Eleanor Roosevelt (1884–1962)