Daktronics Galaxy AF-3190 Series, Руководство пользователя

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ED7244 Copyright 1996-2001
Rev. 4 – 14 March 2001 Daktronics, Inc.
Eyebolts
Almost every display that leaves Daktronics is equipped with eyebolts for lifting the display. There are
two standard sizes of eyebolts: ½
″
and
A
″
.
Load Increase Factor: The load increases as the lift angle (
θ
) decreases. The allowable load on the
eyebolts also decreases with the lift angle due the bending stress on the eyebolts. In sum, the smaller
the angle between the cable and the top of the display, the lighter the sign must be to safely lift it.
Do
NOT attempt to lift the display when the lift angle is less than 30 degrees.
Horizontal Load Angle ½”
A A A A
”
Angle Factor (L/H) Line Weight/ Line Weight/
90 1.00
θθθθ
Load Anchor Load Anchor
60 1.155 90 2600 2600 4000 4000
50 1.305 60 1500 1299 3300 2858
45 1.414 45 650 460 1000 707
30 2.00 30 520 260 800 400