They are quite interested and two or three of them, at the present time, are working on developments along that line. We see a ... I am sure much study as to what constitutes a safe and efficient sliding door, including even automated types will be done in the near future. ... We would like to have a by- pass stacking arrangement at the end of the track operated by means, preferably, of automatic switches.
|Title||:||Public entrance doors|
|Author||:||National Research Council (U.S.). Building Research Institute|
|Publisher||:||National Academies - 1961|