Abstract: Wide span louvers including elongated oval bodies with a thickness to width ratio between 0.14 to 0.25, and a pivot/attachment point offset below the horizontal axis, and other improvements to improve resistance to weight and/or thermal sag in long span shutter assemblies and the like.

Abstract: A panel system includes elongated panels coupled together at a seam portion with respective interlocking portions at corresponding vertical ends to provide a substantially planar surface. In siding panel systems, joined siding panels are provided in vertically arranged rows that further couple together along adjacent horizontal edges of the respective rows of siding panels.

Abstract: A panel system includes elongated panels coupled together at a seam portion with respective interlocking portions at corresponding vertical ends to provide a substantially planar surface. In siding panel systems, joined siding panels are provided in vertically arranged rows that further couple together along adjacent horizontal edges of the respective rows of siding panels.

Abstract: A panel system includes elongated panels coupled together at a seam portion with respective interlocking portions at corresponding vertical ends to provide a substantially planar surface. In siding panel systems, joined siding panels are provided in vertically arranged rows that further couple together along adjacent horizontal edges of the respective rows of siding panels.

Abstract: A method for reducing chatter in an extrusion process, which includes the steps of preparing an extrusion composition by combining a polymer composition with a chatter-reducing formulation, and extruding the extrusion composition to provide a substantially continuous extrudate. The chatter-reducing formulation comprises an alkyltin mercaptide and dibutyltin dilaurate. The resultant extrudate exhibits reduced chatter, which is categorized according to the Reed Scale as less than or equal to 2.

Abstract: A fitting for joining a corrugated conduit to a structure associated therewith is disclosed. The fitting comprises a hollow body having an inner chamber and at least two body resilient tabs extending from an end. The at least two body resilient tabs define at least two body gaps therebetween. Each of the at least two body resilient tabs defines an outwardly extending detent. The fitting also comprises a retaining ring including a flange and at least two ring resilient tabs extending from the flange and defining ring gaps therebetween. Each of the at least two ring resilient tabs defines an inwardly extending detent adapted to engage a corrugated conduit. Each of the at least two body resilient tabs is selectively inserted in a corresponding one of the at least two ring gaps, and the outwardly extending detents selectively engage an end of the flange of the retaining ring.