# Push Back Pallet Rack

Canonical URL: https://www.ridgurak.com/pallet-rack/high-density-pallet-rack/push-back-pallet-rack/

The ultimate in high density storage utilization and selectivity. Features jam-free cart-on-rail design.

## Content

## Push Back Pallet Rack

#### High Density Cart-On-Rail Pallet Rack System

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.

#### Features:

-  Higher utilization of available pallet positions than most storage systems

-  Single aisle for more storage rack area

-  Patented design

-  Easy rolling carts with large coated wheels

-  Low maintenance sealed bearings

-  Linked carts

-  Cart anti-lift-out devices

-  Low cart stack height

-  Lift trucks never enter the rack

#### Applications & Options:

-  Universal product storage

-  Aisle access to each pick face

-  Large number of SKUs and pick faces

## Upright Frames

capacity charts

- [Teardrop Rack](#1a)

- [Slotted Rack](#2a)

- [Structural Rack](#3a)

#### Frame Capacities

| Vertical Beam |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 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 |

• The capacities shown in this table are for static load conditions only.
 • The Frame Capacity Chart gives static load capacities based on the specified "Unsupported Length" of the columns (Vertical Beam Spacing).

WARNING: Due to the system-based design approach of the current RMI Specification, the use of static load capacities are no longer appropriate. Load ratings can only be provided through a system analysis which accounts for configuration of the system, static loading, seismic parameters, stability requirements and the interaction characteristics of the various system components. These capacity tables should only be used as a "starting point".

#### Frame Capacities

| Vertical Beam |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 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 |

• The capacities shown in this table are for static load conditions only.
 • The Frame Capacity Chart gives static load capacities based on the specified "Unsupported Length" of the columns (Vertical Beam Spacing).

WARNING: Due to the system-based design approach of the current RMI Specification, the use of static load capacities are no longer appropriate. Load ratings can only be provided through a system analysis which accounts for configuration of the system, static loading, seismic parameters, stability requirements and the interaction characteristics of the various system components. These capacity tables should only be used as a "starting point".

#### Frame capacity chart - Slotted Connection

| 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 |

#### Frame capacity chart - Bolted Connection

| 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 |

• The capacities shown in this table are for static load conditions only.
 • The Frame Capacity Chart gives static load capacities based on the specified "Unsupported Length" of the columns (Vertical Beam Spacing).

WARNING: Due to the system-based design approach of the current RMI Specification, the use of static load capacities are no longer appropriate. Load ratings can only be provided through a system analysis which accounts for configuration of the system, static loading, seismic parameters, stability requirements and the interaction characteristics of the various system components. These capacity tables should only be used as a "starting point".

## Horizontal Beams

capacity charts

- [Teardrop Rack](#1b)

- [Slotted Rack](#2b)

- [Structural Rack](#3b)

#### Beam Capacities

| 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 Capacities

| 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 Capacities - Slotted Connection

| Beam Length |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | 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 Capacities - Bolted Connection

| Beam Length |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  | 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.

### Options (Frame & Beam)

Must be specified at the time of manufacturing

[Column Sentry Reinforcement!](images/ColumnSentry_1.jpg)

[Reinforced Uprights!](images/ReinforcedUpright 15-16.jpg)

### Accessories

[RamGuard](images/RamGuard, Velcro-025.jpg)

### Do you need Rack now?

Find a location near you.

[STOCKING LOCATIONS](./stocking-locations/)

## Push Back Rack - Virtual Showroom

Push back pallet rack systems store pallets of the same product on a system of carts-on-rails in lanes two to five positions deep.  Pallets are loaded by "pushing back" previously placed pallets, setting the new pallet on the next cart position. Similarly, as a pallet is retrieved, the next pallet rolls forward to the aisle.  Push-Back high density storage offers increased selectivity, as every lane can be accessed from the aisle without affecting the lanes above or below.

## Our Gallery Showcase:

See our installations

- [Show All](#)

### Downloads and Resources

[Rack Systems Selection Guide](./images/pdfs/SelectionGuide2_11_21.pdf)

[Push-Back Install Guide](./images/pdfs/Push-Back Install Guide 2021.pdf)

[Color Selection Guide](./images/pdfs/ColorSelectionGuidewColors_12_22.pdf)

Push Back Rack - Virtual Showroom

[Push-Back Pallet Rack](./images/pdfs/PushBackBrochure8_18_21.pdf)

[Push-Bak Operator Guide](./images/pdfs/91915PBOperatorGuide.pdf)

[Terms and Conditions](./images/pdfs/Terms_and_Conditions.pdf)

[Additional Terms and Conditions](./images/pdfs/AdditionalTermsConditions.pdf)

The rugged construction of the system that RIDG-U-RAK installed for us provides trouble-free operation, and their ongoing support has made a difference in our decision to purchase more rack

Steve Lawson

Plant Manager, Deceuninck North America