Ridg-U-Rak’s Push Back Pallet Rack (Push-Bak) uses a dynamic cart-on-rail system in which deeper pallet loads automatically advance to the aisle when the front pallet load is retrieved
The ultimate in high density storage utilization and selectivity. Features jam-free cart-on-rail design.
Push back pallet rack systems offer similar storage density as drive-in pallet rack while improving selectivity and accessibility to a range of SKUs. Product stored in lanes rests on a system of carts-on-rails available in 2 to 6 pallets deep. From one aisle, pallets are stored by “pushing back” previously placed pallets with a new pallet on the next cart position. When the front pallet is retrieved, gravity causes the next pallet to move forward into a ready position. This “last-in, first-out” system (per lane) reduces picking time when a large number of picking faces are required.
Ridg-U-Rak’s patented design features large coated wheels with sealed bearings. The linked cart design provides smooth operation in the pallet rack system.
Push back pallet rack systems provide a very desirable combination of high density storage and pallet accessibility. Ridg-U-Rak’s Push-Bak™ storage density equals that of drive-in pallet rack systems, yet every lane can be accessed at all times. Any lane can be filled from the aisle without affecting any other adjacent lanes above or below.
Ridg-U-Rak manufactures complete push back pallet rack systems for the peace of mind that comes with single source responsibility. Ridg-U-Rak quality is in the entire system.
Standard Load: | up to 3,000 lbs. |
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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 |
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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 |
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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 | ||||||||||
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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 |
Beam Profile |
Beam Lengths | ||||||||||
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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 |
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 |
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