Abstract: A unitary extruded plaster screed expansion joint for use in cast wall construction. The expansion joint includes a front wall and a first pair of opposing side walls extending rearwardly from the outer edges of the front wall. A second pair of opposing side walls extends rearwardly and outwardly from the rear edges of the first pair of opposing side walls. A pair of planar flanges extends laterally from the rearmost edges of the second pair of opposing side walls, and an inwardly and rearwardly arched wall connects the second pair of opposing side walls. The expansion joint is attached to a support surface, and plaster slabs are formed in place on the support surface adjacent to the expansion strip. The front wall is attached to the side walls of the expansion strip in such a manner as to prevent plaster residue from accumulating at the junctures therebetween, so that when the front wall is stripped away from the expansion joint, no plaster residue remains.

Abstract: Elastomeric multi-tubular glands, which are adapted to exert reactive thrust when the gland is compressed and relieved within a movement tolerance space between relatively movable bodies, are provided, featuring a generally hexagonal wall member and a strut wall inside the hexagonal wall member, for the strut wall to share I-beam properties with front and back side walls of the hexagonal wall member, having the gland further include opposed means connected with the hexagonal wall member adjacent to a pair of apexes formed by the remaining side walls of the hexagonal wall member, for the opposed means to press and relieve the hexagonal wall member in response to the relative movement of the bodies while the gland leads laterally across the movement tolerance space between the bodies. In certain embodiments, mount fixtures are provided in system with the gland so as to be secured to the bodies as components thereof and carry the gland.

Abstract: Longitudinally multi-tubular elastomeric glands, and in certain embodiments elastomeric gland and mount systems, are provided for the gland or system to be combined with relatively movable bodies to close off a movement tolerance space between the bodies, the gland being characterized longitudinally laterally centrally by including in the structure thereof a generally octagonal wall member wherein a pair of forward and rearward side walls of the octagonal wall member produce an I-beam aspect with an intermediate strut wall of the gland, inside the octagonal wall member, having the intermediate strut wall flanked on opposite sides thereof by another pair of side walls of the octagonal wall member and by structure in the gland for supporting the octagonal wall member at the latter two side walls and transmitting and relieving thrust against the octagonal wall member as prescribed by the relative movement of the bodies.

Abstract: In the current practice of using an extruded elastomeric strip as a seal in a concrete expansion joint, in which the transverse walls more particularly are embodied with a chevron shape, the improvement thereto consisting of making the angled walls of the chevron steeper and spaced more centrally thereof, so that the seal both maintains continuous contact with the vertical faces of the expansion joint and also has a predictably consistent response to compressive forces.

Abstract: A comparatively wide sealing strip extruded of elastomeric material that in practice is used for sealing expansion grooves in bridges or the like, having a conventional arrangement of external functional walls, and in which the internal support walls that are provided to prevent collapse in the external walls while the elastomeric construction material is curing, cooperate to form a centrally located hexagonally shaped wall arrangement that flattens out when the seal is subjected to external compressive forces, and in this way enables the seal to offer an optimum minimum resistance to change to a diminished size.