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CURVED ALUMINIUM RAIL
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CURVED ALUMINIUM RAIL

Knight curved enclosed track in 6005-T5 aluminium: 499–1,360 kg, bend radii from 0.92 m, custom radii available. Capacity charts and manuals from FULLSHARP.

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Description

Curved Aluminum Rail Series

Knight Global Curved Aluminum Rail Series

Series: RAD4112 / RAD6112 / RAD7512

The Knight Global RAD4112, RAD6112 and RAD7512 curved rail systems use curved enclosed track, extruded from lightweight high-strength aluminium alloy. The design lets a load travel smoothly around corners and past fixed obstructions on the shop floor.

The curved rail is the ideal solution for direct loading on single curved sections. Combined with purpose-made nylon trolley wheels, it delivers the lowest rolling resistance in the industry, so the operator can position loads lightly and precisely.

It is the natural choice for lines that need non-linear routing – it makes better use of floor space and extends the working envelope without a complicated secondary rail.

*Note: Aluminium alloy to ASTM B221 6005-T5. Custom bend radii are available to suit the project. Accessories can be positioned anywhere along the rail with no welding.

Features & Benefits

Features

  • ASTM B221 6005-T5 aluminium alloy – high strength, low weight.
  • Curved enclosed track, extruded as a single profile.
  • Standard bend radii:
    • RAD4112: 0.92 m – 2.43 m [3 ft – 8 ft]
    • RAD6112: 1.21 m – 2.43 m [4 ft – 8 ft]
    • RAD7512: 1.52 m – 2.44 m [5 ft – 8 ft]
  • Custom bend radii available on request.
  • Fully compatible with Knight Global trolleys, end trucks and hangers.
  • Deflection standards of 1:350, 1:450 and 1:550.

Benefits

  • Carries loads around corners and past overhead obstructions.
  • Makes better use of floor space and extends the working envelope.
  • A wide range of pre-assembled accessories, ready to install.
  • Accessories mount anywhere along the rail, no welding required.
  • Load trolleys and end trucks designed for both cantilever and direct loading.
  • Hangers and end trucks prevent binding of the bridge and runway.
  • Lowest rolling resistance in the industry thanks to nylon trolleys – less operator fatigue.
  • Light weight reduces the load on the roof structure.

Rails in the Series
RAD4112 curved aluminum rail

RAD4112

Curved Aluminium Rail
  • Max capacity: 499 kg [1,100 lbs].
  • Rail weight: 2.83 kg/m.
  • Bend radius from 0.92 m.

Radius range 0.92 – 2.43 m

RAD6112 curved aluminum rail

RAD6112

Curved Aluminium Rail
  • Max capacity: 725 kg [1,600 lbs].
  • Rail weight: 3.72 kg/m.
  • Bend radius from 1.21 m.

Radius range 1.21 – 2.43 m

RAD7512 curved aluminum rail

RAD7512

Curved Aluminium Rail
  • Max capacity: 1,360 kg [3,000 lbs].
  • Rail weight: 5.95 kg/m.
  • Bend radius from 1.52 m.

Radius range 1.52 – 2.44 m

Capacity by Model
*Deflection criteria: Each hanger span is tested for the maximum single-point load that meets a deflection ratio of 1:350 (1″ of deflection over 350″ of length), 1:450 (1″ over 450″), 1:550 (1″ over 550″). All figures are based on single point loading.

RAD4112 Max capacity 499 kg [1,100 lbs] | Rail weight 2.83 kg/m | Radius 0.92 – 2.43 m

RAD4112 Capacity – by Hanger Span

Hanger Span (ft / m) 1:350 Ratio 1:450 Ratio 1:550 Ratio
lbs kg lbs kg lbs kg
5 / 1.52 1,100 499 950 431 700 317
6 / 1.83 1,100 499 950 431 700 317
7 / 2.13 1,050 476 875 397 500 227
8 / 2.45 1,050 476 775 351 500 227
9 / 2.74 950 431 675 306 425 193
10 / 3.05 850 385 650 295 425 193
11 / 3.35 700 317 550 250 350 159
12 / 3.66 550 250 450 204 300 136
13 / 3.96 500 226 385 175 250 113
14 / 4.27 435 197 300 136 250 113
15 / 4.57 350 159 250 113 200 90
16 / 4.88 335 152 250 113 200 90
17 / 5.18 280 127 175 79 150 68
18 / 5.49 265 120 175 79 150 68
19 / 5.79 230 104 150 68 125 56
20 / 6.10 210 95 150 68 125 56
21 / 6.40 195 88 125 57 125 57
22 / 6.71 175 79 125 57 100 45
23 / 7.01 160 73 125 57 100 45
24 / 7.32 145 66 100 45 75 34

RAD6112 Max capacity 725 kg [1,600 lbs] | Rail weight 3.72 kg/m | Radius 1.21 – 2.43 m

RAD6112 Capacity – by Hanger Span

Hanger Span (ft / m) 1:350 Ratio 1:450 Ratio 1:550 Ratio
lbs kg lbs kg lbs kg
5 / 1.52 1,600 725 1,300 590 1,100 499
6 / 1.83 1,600 725 1,300 590 1,100 499
7 / 2.13 1,500 680 1,175 533 995 451
8 / 2.45 1,475 669 1,075 488 900 408
9 / 2.74 1,400 635 1,025 465 870 395
10 / 3.05 1,325 601 925 420 785 356
11 / 3.35 1,100 499 875 397 740 336
12 / 3.66 950 431 750 340 640 290
13 / 3.96 825 374 650 295 550 250
14 / 4.27 750 340 575 261 490 222
15 / 4.57 675 306 515 233 435 197
16 / 4.88 600 272 470 213 400 181
17 / 5.18 525 238 405 184 345 157
18 / 5.49 450 204 350 159 295 134
19 / 5.79 425 193 325 147 275 125
20 / 6.10 400 181 300 136 255 116
21 / 6.40 360 163 275 125 230 104
22 / 6.71 320 145 250 113 210 95
23 / 7.01 285 129 210 95 180 82
24 / 7.32 245 111 185 84 160 73

RAD7512 Max capacity 1,360 kg [3,000 lbs] | Rail weight 5.95 kg/m | Radius 1.52 – 2.44 m

RAD7512 Capacity – by Hanger Span

Hanger Span (ft / m) 1:350 Ratio 1:450 Ratio 1:550 Ratio
lbs kg lbs kg lbs kg
5 / 1.52 3,000 1,360 2,700 1,225 1,700 771
6 / 1.83 3,000 1,360 2,700 1,225 1,700 771
7 / 2.13 3,000 1,360 2,700 1,225 1,700 771
8 / 2.45 3,000 1,360 2,700 1,225 1,700 771
9 / 2.74 2,700 1,225 2,400 1,088 1,700 771
10 / 3.05 2,500 1,134 2,000 907 1,700 771
11 / 3.35 2,500 1,134 1,900 862 1,500 680
12 / 3.66 2,500 1,134 1,800 816 1,500 680
13 / 3.96 2,000 907 1,800 816 1,500 680
14 / 4.27 2,000 907 1,500 680 1,300 590
15 / 4.57 1,900 861 1,500 680 1,300 590
16 / 4.88 1,800 816 1,200 544 1,000 454
17 / 5.18 1,700 771 1,200 544 1,000 454
18 / 5.49 1,600 726 1,000 454 900 408
19 / 5.79 1,450 658 1,000 454 900 408
20 / 6.10 1,300 590 900 408 800 363
21 / 6.40 1,100 499 900 408 800 363
22 / 6.71 900 408 800 363 600 272
23 / 7.01 900 408 700 317 600 272
24 / 7.32 885 402 700 317 600 272
25 / 7.62 850 386 700 317 575 261
26 / 7.92 725 329 700 317 500 227
27 / 8.23 725 329 675 306 500 227
28 / 8.53 600 272 550 250 485 220
29 / 8.83 600 272 550 250 450 204

Deflection Standards & Ergonomic Force Explained

What 1:350, 1:450 and 1:550 Mean

Because of ergonomic requirements, each rail span is tested to determine the maximum single-point load allowed to reach a given deflection:

  1. 1:350 – 1 inch of deflection per 350 inches of rail length (more flexible, heavier loads).
  2. 1:450 – 1 inch of deflection per 450 inches of rail length (stiffer, better ergonomics).
  3. 1:550 – 1 inch of deflection per 550 inches of rail length (stiffest, optimum ergonomics).

Operating Force Estimation Formula

  • For a quick estimate of the ergonomic operating force required, use: Fs = 0.017 × Total Mass = maximum force (lbf) to overcome inertia.
  • The force needed to keep the load moving (Fk, kinetic friction) is 0.35 × the breakaway force (Fs).
  • Example – a mass of 250 lbs (113 kg):
    • Fs = 0.017 × 250 = 4.25 lbf (1.9 kg) to overcome inertia.
    • Fk = 4.25 × 0.35 = 1.48 lbf (0.67 kg) to keep it moving.

Elastic Deformation

Recoverable deformation. When the load is removed, the material returns to its original shape. The elastic range ends when the material reaches its yield strength, from which point plastic deformation begins.

Plastic Deformation

Non-recoverable deformation. Beyond this limit the material will not return to its original shape. It ends in fracture of the material.

Knight Global follows material handling industry standards when rating workstation crane rail systems. Each component (rail, hanger, trolley and so on) is tested individually to establish its ultimate failure point, from which a safe working load is assigned. The recommended capacity tables are based on single point loading at the spans listed.


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