Doule Last saved on August 3, Other maneuvers have been proposed for lateral canal cupulolithiasis. Looking at the diagram above, it is hard to see how anyone could have persistent lateral canal BPPV, because the lateral canal is hallpikf so that debris should roll down the canal into the vestibule. Therefore, it is difficult to determine the origin of residual dizziness from only its characteristics. Hain, MD Page last modified: If the exercises are being supervised, given that the diagnosis of BPPV is well established, in most cases we modify the maneuver so that the positions are attained with body movements rather than head movements. Stambolieva K, Angov G. This is most easily done by using a recliner chair or by using pillows arranged on a couch see figure halloike.
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For users who opt to use SS without downsizing the diameter of the strand, other benefits apply. Bethlehem Structural Wire Rope consists of six strands made from zinc-coated wire with strands laid helically around a core, such as another strand or smaller wire rope. When specified, the wire rope shall be prestretched. It can be furnished with Asym B weight or Class C weight zinc-coated outer wires or Class B weight or Class C weight zinc-coated wires throughout where additional corrosion protection is required.
In doing so, we are able to test and certify the following:. Bethlehem Structural Strand is an arrangement of wires laid helically around a center wire to produce x symmetrical cross section. Structural strand is used as a load-carrying tension member where great flexibility and bending are not major requirements.
The wire rope is furnished with Class A weight zinc-coated wires throughout. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Using SS also offers these advantages:. Please contact your WW regional sales manager or customer service representative for further information.
For any given diameter, wire strand is the least flexible of steel cables. The prestretched rope shall meet the required minimum modulus of elasticity. In addition, WW can obtain material certification from end termination vendors. These are the features that permit strand to adapt so successfully to structural applications.
Structural strand provides a high strength-to-weight ratio, a high modulus of elasticity and a small diameter-per-unit strength. This specification covers zinc-coated steel structural wire rope, prestretched or nonprestretched for use where a high-strength, relatively flexible prefabricated zinc-coated multiple-wire tension member is desired as asgm component part of a structure.
Structural wire rope provides greater flexibility when compared with coarse strand constructions and is generally the structural cable of choice where sstm ability is an important requirement, such as forming flemish eye ends drop terminals. Refer to Table 1 for structural strand data.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. Products Structural Strand Using SS also offers these advantages: It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Reduced Structural Strand Diameter—Now that designers can utilize a smaller diameter strand for the guying system, SS offers a lower cost per foot, allowing the user to cut valuable dollars from the cost of a project.
The weight of the zinc coating shall be determined by a stripping test made on the individual wires prior to fabrication of strand. In doing so, we are able to test and certify the following: This abstract is a brief summary of the referenced standard.
The higher strength results in an increased design factor of the guying system. The steel shall conform to the following tensile requirements: Product description Prestretching Striping Proofloading Pin orientation Certification Special features Length tolerances Galvanized coating Modulus of elasticity Length and point of measurement Measuring at required load End terminations dimensions, pin sizes, jaw openings Nondestructive test method.
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