User manual ELECTRO-VOICE X-LINE RIGGING

[. . . ] X-Line Rigging Manual ELECTRO-VOICE® X-Line TM Rigging Manual Table of Contents Rigging-Safety Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1 X-Line Rigging System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1. 1 Overview of the X-Line Flying System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The locating holes in the enclosure rigging track are spaced 1. 00 inch (25. 4 mm) apart. Moving the attachment position one hole results in a 2° change in the enclosure vertical angle. However, angle adjustments of 0. 5° are possible. Each triple-stud fitting on the Xvsg, Xvsl and Xvsd front straps is attached to the chain with a pin that passes through a hole on the fitting and through the last link on the end of the chain. Note that there are two holes on each fitting that are labeled A and B. These two holes offer two attachment points that change the length of the linking strap assembly. 19 ELECTRO-VOICE® TM Rigging Manual X-Line The rigging straps are shipped from the factory with chain connected in the A position on the fittings on both ends. (This would be denoted as an A-A length. ) When the chain is connected in the B position on both fittings (known as the B-B length), the strap is 0. 50 inches longer than when connected in the A-A position. This 0. 50-inch change in length results in a 1°-angle adjustment. When the chain is connected in the A position on one fitting and the B position on the other fitting (known as the A-B length), the strap is 0. 25 inches longer than when connected in the A-A position. This 0. 25-inch change in length results in a 0. 5°-angle adjustment. Thus, by adjusting the length of the straps and selecting their attachment position on the enclosure front track, the relative angles between boxes can be adjusted in 0. 5° increments. When used with the A-A length, even-numbered angles result (0°, 2°, 4°, 6°, etc. ) when changing the attachment position of the strap along the track, while odd-numbered angles result (1°, 3°, 5°, 7°, etc. ) when used with the B-B length. With A-B length, in between angles are achievable (0. 5°, 2. 5°, 4. 5°, etc. ). When planning angle adjustments between boxes, the shape of the enclosure must be taken into account. Two rectangular enclosures (Xvls, Xsub, Xfil) can be pulled up tight with their sides parallel, a 0° relative aiming angle exists between the enclosures (i. e. , both are facing straight ahead and the sound from both is aimed straight ahead). When two trapezoidal enclosures (Xvlt only) are pulled up tight with their sides parallel, a 5° relative aiming angle exists between the enclosures (because the enclosure shape is a 5° wedge, the sound from both is aimed 5° apart). When a trapezoidal enclosure (Xvlt) and rectangular enclosure (Xvls, Xsub, Xfil1 or Xfil2) are pulled up tight with their sides parallel, a 2. 5° relative aiming angle exists between the enclosures. Figure 8 shows all of the possible combinations of rigging attachment locations and linking strap lengths. When designing an array using the X-Line modeling software, the program will automatically tell you what each front strap length is required (A-A, A-B or B-B) and at what position on the rigging they should be attached for each enclosure. Rectangular Box (Xvls or Xsub) to Rectangular Box (Xvls or Xsub) Angle Between Boxes 0. 0° 0. 5° 1. 0° 2. 0° 2. 5° 3. 0° 4. 0° 4. 5° 5. 0° 6. 0° 6. 5° 7. 0° Front Chain Configuration A-A A-B B-B A-A A-B B-B A-A A-B B-B A-A A-B B-B Holes Showing In Front Rigging 0 0 0 1 1 1 2 2 2 3 3 3 Note: Accoustic gaps will occur with angles greater than 6. 5° between Xvls & Xvlt systems. Note: Accoustic gaps will occur with angles greater than 8. 5° between Xvlt Systems. Rectangular Box (Xvls or Xsub) to Trapezoidal Box (Xvlt) Angle Between Boxes 2. 5° 3. 0° 4. 0° 4. 5° 5. 0° 6. 0° 6. 5° 7. 0° 8. 0° 8. 5° Front Chain Configuration A-B B-B A-A A-B B-B A-A A-B B-B A-A A-B Holes Showing In Front Rigging 0 0 1 1 1 2 2 2 3 3 Angle Between Boxes 5. 0° 6. 0° 6. 5° 7. 0° 8. 0° 8. 5° 9. 0° 10. 0° 10. 5° Trapezoidal Box (Xvlt) to Trapezoidal Box (Xvlt) Front Chain Configuration B-B A-A A-B B-B A-A A-B B-B A- A A-B Holes Showing In Front Rigging 0 0 0 1 1 1 2 2 2 Note: Accoustic gaps will occur with angles greater than 5. 0° between Xvls systems. Figure 8: Enclosure Vertical Angle Adjustments ELECTRO-VOICE® X-Line TM Rigging Manual 20 In this document and in the software modeling program, the front rigging fitting attachment locations are denoted by the number of holes showing in the rigging track once a rigging strap is installed. On each side of the enclosures at the front, there is a pin in the middle of the rigging track that is used to secure the Front Dollies to the enclosures. [. . . ] Prior to each use, inspect the building, tower or scaffold structural supports for any cracks, deformation, broken welds, corrosion, missing or damaged components that could reduce the structural strength. Damaged structural supports should be replaced or repaired and recertified by a professional engineer. Never exceed the limitations or maximum recommended load for the supports. Miscellaneous Mechanical Components: Prior to each use, inspect all mechanical components (chain, wire ropes, slings, shackles, hooks, fittings, ratchet straps, etc. ) for any cracks, deformation, broken welds, slipping crimps, fraying, abrasion, knots, corrosion, chemical damage, loose screws, missing or damaged components that could reduce the maximum strength specified by the component manufacturer. [. . . ]