Abstract
Steel-plate-laminated gypsum planks, glass-cloth-laminated ones and glass-roving-reinforced ones were manufactured for laboratory experiments. The properties of those planks were examined by bending test.
The steel-plate-laminated planks had much higher ultimate bending strength than the plywood in case or the materials with the same thickness. Both the bulk density and the strength comparable to those of the plywood were not obtained in gypsum planks, however, the glass-roving-reinforced planks possessed almost the same ultimate flexural strength and toughness as the plywood.
