Abstract: There is provided a glulam wood beam comprising planks having a width substantially smaller than the width of the beam, assembled into snips. The beam is characterized by the presence of flash in the interior by external surfaces made essentially of duramen. There is further provided a method for making the wood beam of the instant invention wherein the strips are derived from panels and in which the cutting of the panels into strips is programmed to ensure that the subsequent assembly of the strips will result in beams having external surfaces comprised essentially of duramen, thus providing a beam with enhanced mechanical resistance.

Abstract: There is provided a glulam wood beam comprising planks having a width substantially smaller than The width of the beam, assembled into snips. The beam is characterized by the presence of flash in the interior by external surfaces made essentially of duramen. There is further provided a method for making the wood beam of the instant invention wherein the strips are derived from panels and in which the cutting of the panels into strips is programmed to ensure that the subsequent assembly of the strips will result in beams having external surfaces comprised essentially of duramen, thus providing a beam with enhanced mechanical resistance.

Abstract: A demountable building structure comprises a plurality of arches pivoted at their lower ends for vertical swinging movement between raised and lowered positions, and a plurality of flexible transparent plastic sheets extending between and supported by the arches and rendering the space beneath the arches weathertight. The sheets have tension cables along at least one edge thereof, the cables being secured at their opposite ends adjacent the lower ends of the arches. Various embodiments of securement of the sheets to the arches are disclosed.