Abstract: Load-bearing cold-formed steel (CFS) walls sheathed with double layers of gypsum plasterboard on both sides have demonstrated good fire resistance and attracted increasing interest for use in mid-rise CFS structures. As the main connection method, screw connections between CFS and gypsum sheathing play an important role in both the structural design and fire resistance of this wall sy...

PURPOSE The aim of this paper was to report 2 patients (3 eyes) with proliferative diabetic retinopathy (PDR) who showed marked sheathing of the retinal arterioles that was ultimately attributed to calcification following vitrectomy. CASES Case 1 involved a 65-year-old female with PDR who underwent bilateral vitrectomy for traction retinal detachment. Postoperatively, bilateral retinal redeta...

Central retinal artery occlusion (CRAO) and multifocal retinitis with perivascular sheathing are rare in ocular toxoplasmosis. We report a case of toxoplasmic CRAO and multifocal retinitis with perivascular sheathing. A healthy 83-year-old male developed left panuveitis. Funduscopic examination of the left eye showed a swollen optic disc and sheathing of the retinal artery with a dense vitreous...

The objective of this paper is to provide the stiffness and strength characteristics for coldformed steel stud walls stabilized by sheathing. The primary stability resistance is provided by translational (lateral) stiffness supplied at the fastener locations to the cold-formed steel studs. This paper separates the source of this translational stiffness into two parts: local and diaphragm. To an...

The strength of sheathed wall systems is substantially greater than unsheathed walls with the same studs. Testing on studs sheathed on both sides with dry gypsum board demonstrate strength increases as large as 70% over unsheathed studs (Miller and Peköz 1993, Miller and Peköz 1994). The current AISI Specification for sheathed wall stud systems are complicated, only apply when the sheathing is ...

A case of arteriosclerotic retinopathy associated with retinal venous thrombosis was treated with Anginin and the following results obtained: 1) Visual acuity was improved from 0.03 to 0.7. 2) Retinal hemorrhages were absorbed and pipe-stem sheathing of the branch of retinal artery decrease, with white sheathing remaining partially. 3) It was therefore considered that the pipestem sheathing was...

Rucker (I944) was first to describe sheathing of retinal veins in patients with multiple sclerosis. This was supported by later observers (Treusch and Rucker, 1944; Haar, I953; Scott, I96I), but the incidence was found to vary from IO to 23 per cent. It was initially thought that this periphlebitis was not associated with other ocular conditions, and might indicate a possible pathological basis...

A common lateral force resisting system for cold-formed steel (CFS) buildings consists of shear walls sheathed with oriented strand board (OSB). Previous experimental and computational research on CFS shear walls, as well as those with other framing materials, has demonstrated that the complex interaction of the fasteners with the sheathing is an important factor in the nonlinear behavior of th...

A series of observations of polymer sheathing in multiwalled carbon nanotube (MWCNT)−polycarbonate composites are presented. This sheathing was observed in images of the composite fracture surface and is consistent with diameter distributions of the as-received and embedded MWCNTs. A novel nanomanipulation experiment, where the sheathing balls up when contacted by an AFM tip, confirms this phen...

This series of experiments aims to characterize the cyclic behavior of cold-formed steel (CFS) stud-to-sheathing connections. This connection provides the key energy dissipating behavior in wood sheathed CFS shear walls, and provides bracing to the studs under gravity and out-of-plane loads. A simple testing rig is developed consisting of two CFS lipped channels facing toe-to-toe connected on t...