# Gravity Flow Rack

Canonical URL: https://www.ridgurak.com/pallet-rack/high-density-pallet-rack/gravity-flow-rack/

Feeds pallets and cartons of product to processing, order picking and shipping.

## Content

## Gravity Flow Rack

#### High Density First In, First Out Management System

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:                   3x2-4, 3x3 and 4x3-inch

Beam Sizes:                    5-inch roll-formed

Standard Load:                  3,000 lbs

#### Features & Benefits:

-  Multiple heavy-duty roller options

-  Economical roll formed columns

-  Deeper systems

-  Pallet flow audits and testing

-  Available entry guides

-  First in – first out per lane

#### Applications:

-  Distribution centers

-  Pick modules and staging areas

-  Large value per SKU

-  High throughput

## 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

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

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

### Accessories

[Row To Wall Spacer](images/PR1-RowToWall.png)

### Do you need Rack now?

Find a location near you.

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

## Flow System - Virtual Showroom

Gravity Flow are high density "First In, First Out" rack systems. Rollers and brakes are commonly used to feed pallets down an incline to a staging or picking operation. Systems are multiple levels high, and multiple positions deep. Flow rack systems provide an effective storage option for applications involving a low number of SKUs and high inventory turns, and are useful when storing time sensitive products.

## Our Gallery Showcase:

See our installations

- [Show All](#)

### Downloads and Resources

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

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

Flow System - Virtual Showroom

[Gravity Flow at T. Marzetti](./images/pdfs/2041302MarzettiCaseStudy.pdf)

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

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

Ridg-U-Rak installed a highly efficient, organized storage rack system that keeps our production floor moving at top speed.

Rick Brownstead

Maintenance Materials Manager, T. Marzetti Company