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

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	38,800	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	26,600

Consult with factory for vertical beam-to-beam spacings greater than 108"
• The Frame Capacity Chart gives allowable loads based on the specified "Unsupported Length" of the columns.
• Values shown are in full compliance with the current RMI Specifications.
• The loads on upright frames accumulate from top to bottom, therefore, the unsupported length and the column load below each beam level should be checked to determine the worst-case scenario.
• The capacities shown in this table are for static load conditions only.
• For other special conditions such as seismic or wind loadings, consult with Ridg-U-Rak sales.

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

Consult with factory for vertical beam-to-beam spacings greater than 108"
• The Frame Capacity Chart gives allowable loads based on the specified "Unsupported Length" of the columns.
• Values shown are in full compliance with the current RMI Specifications.
• The loads on upright frames accumulate from top to bottom, therefore, the unsupported length and the column load below each beam level should be checked to determine the worst-case scenario.
• The capacities shown in this table are for static load conditions only.
• For other special conditions such as seismic or wind loadings, consult with Ridg-U-Rak sales.

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

Horizontal Beams

capacity charts

Beam Capacities

Beam Profile	Beam Lengths
Beam Profile	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
Beam Profile	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

Accessories

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.