Gravity Flow Pallet Rack Systems are ideal for supplying pallet or carton loads of common SKUs in sorting and distribution operations. They also are a great option where high throughput is required or in a warehouse storage situation that calls for large volumes of each SKU.
Feeds pallets and cartons of product to processing, order picking and shipping.
Gravity flow pallet racks act like a conveyor within a rack structure. Pallets are deposited at the charge end and then flow down an incline to be picked at the opposite end. Systems can be 6 or more bays high and can run from a few to 15 positions deep. Using gravity to gently keep pallet loads staged for picking operations, flow racks are an economical first-in first-out storage rack solution.
Ridg-U-Rak conducts pallet flow tests using the client’s actual pallet loads for a reliable, efficient and well-designed pallet rack solution. Our experienced engineering staff works directly with Ridg-U-Rak project managers to ensure that all specifications are met. Installation services are available and pallet rack projects are completed on time and on budget.
Columns Sizes: 3×2-4, 3×3 and 4×3-inch
Beam Sizes: 5-inch roll-formed
Standard Load: 3,000 lbs
capacity charts
| Vertical Beam |
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|---|---|---|---|---|---|---|---|---|---|
| Spacing | UF-S31I | UF-S32I | UF-S33I | UF-R33I | UF-M33I | UF-Y33I | UF-H33I | UF-M43I | UF-H43I |
| 36″ | 19,100 | 23,500 | 28,600 | 34,100 | 38,000 | 42,100 | 47,000 | 47,900 | 62,600 |
| 42″ | 17,900 | 22,100 | 26,900 | 33,100 | 35,600 | 39,500 | 43,000 | 45,700 | 60,500 |
| 48″ | 16,700 | 20,600 | 25,100 | 29,800 | 33,800 | 36,600 | 40,900 | 44,500 | 58,100 |
| 54″ | 15,200 | 18,900 | 23,100 | 27,500 | 31,900 | 33,600 | 38,600 | 43,100 | 55,300 |
| 60″ | 13,800 | 17,200 | 21,100 | 25,000 | 28,100 | 30,400 | 33,900 | 40,200 | 52,400 |
| 72″ | 10,800 | 13,700 | 17,000 | 20,000 | 22,300 | 24,100 | 26,800 | 35,300 | 46,000 |
| 84″ | 8,200 | 10,600 | 13,200 | 15,400 | 17,200 | 18,600 | 20,700 | 30,200 | 39,300 |
| 96″ | 6,500 | 8,400 | 10,500 | 12,200 | 13,500 | 14,700 | 16,300 | 25,200 | 32,800 |
| 108″ | 5,200 | 6,800 | 8,500 | 9,900 | 10,900 | 11,800 | 13,100 | 20,500 | 22,600 |
| Vertical Beam |
 |
 |
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|---|---|---|---|---|---|---|---|---|---|---|
| Spacing | UF-S32C | UF-M32C | UF-H32C | UF-S33C | UF-R33C | UF-M33C | UF-Y33C | UF-H33C | UF-M43C | UF-H43C |
| 36″ | 24,700 | 29.800 | 36,400 | 29,800 | 35,500 | 40,500 | 44,000 | 49,100 | 51,700 | 63,200 |
| 42″ | 23,500 | 27,900 | 34,100 | 28,100 | 33,500 | 37,100 | 41,300 | 45,000 | 49,400 | 61,100 |
| 48″ | 22,100 | 26,900 | 32,800 | 26,200 | 31,100 | 35,300 | 38,300 | 42,700 | 48,000 | 58,700 |
| 54″ | 20,700 | 25,700 | 31,300 | 24,200 | 28,700 | 33,300 | 35,100 | 40,400 | 46,600 | 55,900 |
| 60″ | 19.000 | 23,200 | 28,200 | 22,000 | 26,000 | 29,300 | 31,800 | 35,400 | 43,400 | 53,000 |
| 72″ | 15.700 | 19,100 | 23,200 | 17,700 | 20,800 | 23,300 | 25,200 | 28,100 | 38,100 | 46,500 |
| 84″ | 12.400 | 15,200 | 18,500 | 13,800 | 16,100 | 17,900 | 19,400 | 21,600 | 32,600 | 39,700 |
| 96″ | 9.900 | 12,300 | 14,800 | 10,900 | 12,700 | 14,100 | 15,300 | 17,000 | 27,200 | 33,100 |
| 108″ | 8.000 | 10,000 | 12,100 | 8,900 | 10,300 | 11,400 | 12,300 | 13,700 | 22,200 | 26,900 |
| Vertical Beam Spacing | SSF-335 |
|---|---|
| 36″ | 34,200 |
| 48″ | 33,300 |
| 60″ | 30,000 |
| 72″ | 24,000 |
| 84″ | 18,400 |
| 96″ | 14,200 |
| 108″ | 11,300 |
| Vertical Beam Spacing | SBF-335 | SBF-341 | SBF-445 |
|---|---|---|---|
| 36″ | 34,200 | 40,300 | 51,600 |
| 48″ | 33,300 | 39,200 | 50,600 |
| 60″ | 30,000 | 35,000 | 50,000 |
| 72″ | 24,000 | 27,600 | 44,500 |
| 84″ | 18,400 | 21,000 | 38,600 |
| 96″ | 14,200 | 16,100 | 32,600 |
| 108″ | 11,300 | 12,800 | 26,800 |
capacity charts
| Beam Profile |
Beam Lengths | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48″ | 60″ | 72″ | 84″ | 92″ | 96″ | 102″ | 108″ | 120″ | 144″ | 156″ | |
| 250 S | 5,700 | 4,530 | 3,130 | 2,300 | 1,910 | 1,750 | 1,550 | 1,380 | 1,120 | 770 | 660 |
| 300 S | 7,500 | 5,980 | 4,820 | 3,530 | 2,940 | 2,690 | 2,380 | 2,120 | 1,720 | 1,190 | 1,010 |
| 355 S | 9,760 | 7,770 | 6,460 | 5,330 | 4,440 | 4,070 | 3,600 | 3,210 | 2,590 | 1,790 | 1,520 |
| 410 L | 10,810 | 8,620 | 7,150 | 6,110 | 5,570 | 5,200 | 4,600 | 4,100 | 3,310 | 2,290 | 1,940 |
| 410 S | 12,000 | 9,780 | 8,120 | 6,930 | 6,320 | 5,830 | 5,160 | 4,600 | 3,710 | 2,570 | 2,180 |
| 465 S | 12,000 | 11,970 | 9,940 | 8,490 | 7,740 | 7,410 | 6,960 | 6,320 | 5,110 | 3,530 | 3,000 |
| 500 S | 12,000 | 12,000 | 11,170 | 9,540 | 8,700 | 8,330 | 7,830 | 7,380 | 6,140 | 4,250 | 3,610 |
| 550 S | 18,000 | 18,000 | 18,000 | 11,150 | 10,160 | 9,720 | 9,140 | 8,620 | 7,740 | 5,420 | 4,610 |
| 600 S | 18,000 | 18,000 | 18,000 | 12,850 | 11,710 | 11,210 | 10,540 | 9,940 | 8,920 | 6,790 | 5,770 |
| 650 S | 18,000 | 18,000 | 18,000 | 14,660 | 13,360 | 12,790 | 12,020 | 11,340 | 10,180 | 8,360 | 7,110 |
| 650 R | 18,000 | 18,000 | 18,000 | 18,000 | 15,160 | 14,520 | 13,640 | 12,870 | 11,550 | 9,370 | 7,970 |
• Capacities are based on uniformly distributed loads per pair of beams.
• Capacities listed are for non-seismic conditions. For seismic conditions consult with Ridg-U-Rak sales or engineering.
| Beam Profile |
Beam Lengths | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 48″ | 60″ | 72″ | 84″ | 92″ | 96″ | 102″ | 108″ | 120″ | 144″ | 156″ | |
| 250 S | 5,700 | 4,530 | 3,130 | 2,300 | 1,910 | 1,750 | 1,550 | 1,380 | 1,120 | 770 | 660 |
| 300 S | 7,500 | 5,980 | 4,820 | 3,530 | 2,940 | 2,690 | 2,380 | 2,120 | 1,720 | 1,190 | 1,010 |
| 355 S | 9,760* | 7,770 | 6,460 | 5,330 | 4,440 | 4,070 | 3,600 | 3,210 | 2,590 | 1,790 | 1,520 |
| 410 L | 10,810* | 8,620 | 7,150 | 6,110 | 5,570 | 5,200 | 4,600 | 4,100 | 3,310 | 2,290 | 1,940 |
| 410 S | 12,270* | 9,780* | 8,120 | 6,930 | 6,320 | 5,830 | 5,160 | 4,600 | 3,710 | 2,570 | 2,180 |
| 465 S | 15,020* | 11,970* | 9,940* | 8,490 | 7,740 | 7,410 | 6,960 | 6,320 | 5,110 | 3,530 | 3,000 |
| 500 S | 16,890* | 13,460* | 11,170* | 9,540* | 8,700 | 8,330 | 7,830 | 7,380 | 6,140 | 4,250 | 3,610 |
| 550 S | 19,720* | 15,710* | 13,050* | 11,150* | 10,160* | 9,720* | 9,140* | 8,620 | 7,740 | 5,420 | 4,610 |
| 600 S | 22,500* | 18,120* | 15,050* | 12,850* | 11,710* | 11,210* | 10,540* | 9,940* | 8,920 | 6,790 | 5,770 |
| 650 S | 22,500* | 20,670* | 17,160* | 14,660* | 13,360* | 12,790* | 12,020* | 11,340* | 10,180* | 8,360 | 7,110 |
| 650 R | 22,500* | 22,500* | 19,480* | 16,640* | 15,160* | 14,520* | 13,640* | 12,870* | 11,550* | 9,370* | 7,970 |
• Capacities marked with * indicate that the column connection capacity may be limited based on the hook option and/or frame model (see table below).
• Capacities listed are for non-seismic conditions. For seismic conditions consult with Ridg-U-Rak sales or engineering.
• Capacities are based on uniformly distributed loads per pair of beams.
• Capacities listed are for a 2-pallet wide condition.
• All beams over 114″ in length should utilize at least one flanged, tek-screwed or lock-in cross bar located at mid length.
| Beam Length |  |
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|---|---|---|---|---|---|---|---|---|---|---|
| Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | |
| 48″ | 10,880 | 11,160 | 12,290 | 12,290 | 18,510 | 18,910 | ||||
| 54″ | 9,350 | 9,920 | 10,640 | 10,930 | 15,860 | 16,810 | ||||
| 72″ | 6,280 | 7,210 | 7,330 | 7,930 | 10,550 | 12,610 | 18,810 | |||
| 84″ | 4,970 | 5,300 | 5,830 | 5,830 | 8,060 | 10,810 | 14,840 | 18,960 | ||
| 92″ | 4,140 | 4,420 | 4,860 | 4,860 | 6,650 | 9,870 | 12,330 | 17,310 | ||
| 96″ | 3,800 | 4,060 | 4,460 | 4,460 | 6,080 | 9,320 | 11,280 | 16,590 | ||
| 102″ | 3,360 | 3,600 | 3,950 | 3,950 | 5,350 | 8,260 | 9,940 | 15,620 | 14,130 | |
| 108″ | 2,990 | 3,210 | 3,530 | 3,530 | 4,750 | 7,370 | 8,830 | 14,750 | 12,520 | |
| 120″ | 2,420 | 2,600 | 2,860 | 2,860 | 3,820 | 5,970 | 7,100 | 12,880 | 10,030 | |
| 132″ | 2,000 | 2,150 | 2,360 | 2,360 | 3,140 | 4,930 | 5,840 | 10,640 | 8,220 | 17,640 |
| 144″ | 1,670 | 1,810 | 1,990 | 1,990 | 2,630 | 4,150 | 4,880 | 8,940 | 6,870 | 15,640 |
| 156″ | 1,430 | 1,540 | 1,690 | 1,690 | 2,230 | 3,530 | 4,150 | 7,620 | 5,820 | 13,330 |
| 180″ | 1,070 | 1,160 | 1,270 | 1,270 | 1,670 | 2,660 | 3,100 | 5,730 | 4,340 | 10,010 |
Note: Beams must be secured by beam locks against accidental upward forces. All capacities are per pair of beams based on uniformly distributed loads. Capacities are based on current RMI specifications.
| Beam Length | |
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|---|---|---|---|---|---|---|---|---|---|---|
| Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | Un-braced Cap/pr | Braced Cap/pr | |
| 48″ | 10,880 | 11,160 | 12,290 | 12,290 | 18,510 | 18,910 | ||||
| 54″ | 9,350 | 9,920 | 10,640 | 10,930 | 15,860 | 16,810 | ||||
| 72″ | 6,280 | 7,210 | 7,330 | 7,930 | 10,550 | 12,610 | 18,810 | |||
| 84″ | 4,970 | 5,300 | 5,830 | 5,830 | 8,060 | 10,810 | 14,840 | 18,960 | ||
| 92″ | 4,140 | 4,420 | 4,860 | 4,860 | 6,650 | 9,870 | 12,330 | 17,310 | ||
| 96″ | 3,800 | 4,060 | 4,460 | 4,460 | 6,080 | 9,320 | 11,280 | 16,590 | ||
| 102″ | 3,360 | 3,600 | 3,950 | 3,950 | 5,350 | 8,260 | 9,940 | 15,620 | 14,130 | |
| 108″ | 2,990 | 3,210 | 3,530 | 3,530 | 4,750 | 7,370 | 8,830 | 14,750 | 12,520 | |
| 120″ | 2,420 | 2,600 | 2,860 | 2,860 | 3,820 | 5,970 | 7,100 | 12,880 | 10,030 | |
| 132″ | 2,000 | 2,150 | 2,360 | 2,360 | 3,140 | 4,930 | 5,840 | 10,640 | 8,220 | 17,640 |
| 144″ | 1,670 | 1,810 | 1,990 | 1,990 | 2,630 | 4,150 | 4,880 | 8,940 | 6,870 | 15,640 |
| 156″ | 1,430 | 1,540 | 1,690 | 1,690 | 2,230 | 3,530 | 4,150 | 7,620 | 5,820 | 13,330 |
| 180″ | 1,070 | 1,160 | 1,270 | 1,270 | 1,670 | 2,660 | 3,100 | 5,730 | 4,340 | 10,010 |
Note: All capacities are per pair of beams based on uniformly distributed loads. Capacities are based on current RMI specifications.
