FIG.l0 - Honeycomb for interior support& strength of propelties for additional support: . +:::'" . +:~:: . . " square inner tubes may be inserted in openings of honeycomb . *** *** *.. ... I ::: .. ' '0' *** ::0. ::0. .... :::: honeycomb walls may be doubled or tripled ~ THEATRE DESIGN AND TECHNOLOGY FEBRUARY. 1973 23