EXPANDED METAL GRATING

The diversity of expanded metals pushes us to continually develop and improve the processes and standards used in its production. If you have need of a special material not shown within the website, please use our ‘Contact Us‘ form or give us a call. We can meet your functional or structural need.

Return to our ‘Expanded Metals‘ page, or browse our ‘Expanded Metal Grating‘, ‘Sun Shade & Micro-Mesh‘ and ‘Expanded Mini-Mesh’ pages for product specs of each type. Be sure to view the ‘Expanded Solutions Process‘ page for a technical overview of the process and terminology.

Grating is the most economical industrial walking surface you can install in your plant.
Walking surface is anti-skid, providing safe foothold.
The open design allows effective sprinkler coverage for fire protection; prevents dirt, grease or snow accumulation; it enables a visual ‘see-through’ area inspection; lowers maintenance costs.
Expanded Solutions grating costs less than bar-type or sheet metal grating and is easier to install in new or replacement applications.

Please Note:
The information provided is for descriptive purposes only – NOT FOR DESIGN

CARBON STEEL - Grating Size Chart
STYLE	Lbs. Per Sq. Ft.	Standard Sheet Size (Feet)		Design Size (Inches)		Opening Size (Inches)		Strand Size (Inches)		Overall Thickness (Inches)	No. of Designs Per Ft.		(%) Open Area

		SWD	LWD	SWD	LWD	SWO	LWO	Width	Thick- ness		SWD	LWD

3.0 lb.	3.00	4 & 6	8,10 & 12	1.33	5.33	.940	3.44	.264	.183	.540	9	2.25	60
3.14 lb.	3.14	4-4 & 6	8-10	2.00	6.00	1.625	4.88	.312	.250	.656	6	2	69
4.0 lb.	4.00	4-5 & 6	8 & 10	1.33	5.33	.940	3.44	.300	.215	.618	9	2.25	55
4.27 lb.	4.27	4 & 6	8 & 10	1.41	4.00	1.00	2.88	.300	.250	.625	8.5	3	58
5.0 lb.	5.00	4-5 & 6	8 & 10	1.33	5.33	.813	3.38	.331	.250	.655	9	2.25	50

Aluminum Type 5052-H-32
2.0 lb.	2.00	5	12	1.33	5.33	.940	3.44	.387	.250	.730	9	2.25	48


Please Note: This information is for descriptive purposes only - NOT FOR DESIGN

CARBON STEEL - Grating Size Chart
STYLE	Lbs. Per Sq. Ft.	Standard Sheet Size (Feet)		Design Size (Inches)		Opening Size (Inches)		Strand Size (Inches)		Overall Thickness (Inches)	No. of Designs Per Ft.		(%) Open Area

		SWD	LWD	SWD	LWD	SWO	LWO	Width	Thick- ness		SWD	LWD

3.0 lb.	3.00	4 & 6	8,10 & 12	1.33	5.33	.940	3.44	.264	.183	.540	9	2.25	60
3.14 lb.	3.14	4-4 & 6	8-10	2.00	6.00	1.625	4.88	.312	.250	.656	6	2	69
4.0 lb.	4.00	4-5 & 6	8 & 10	1.33	5.33	.940	3.44	.300	.215	.618	9	2.25	55
4.27 lb.	4.27	4 & 6	8 & 10	1.41	4.00	1.00	2.88	.300	.250	.625	8.5	3	58
5.0 lb.	5.00	4-5 & 6	8 & 10	1.33	5.33	.813	3.38	.331	.250	.655	9	2.25	50

Aluminum Type 5052-H-32
2.0 lb.	2.00	5	12	1.33	5.33	.940	3.44	.387	.250	.730	9	2.25	48


Please Note: This information is for descriptive purposes only - NOT FOR DESIGN

NOMINAL WEIGHTS AND DIMENSIONS*
STYLE	Nominal Weight for Lbs. Per Sq. Ft.	Design Size (Inches) _B		Opening Size (Inches) _C		Strand Size (Inches) _C		Overall Thickness (Inches)	No. of Designs Per Ft.		(%) Open Area

		SWD	LWD	SWO	LWO	Width	Thick- ness		SWD	LWD
GRATING-CARBON STEEL
2.0 lb.	2.00	1.33	5.33	1.000	3.60	.235	.135	.460	9	2.25	77
3.0 lb.	3.00	1.33	5.33	.940	3.44	.264	.183	.540	9	2.25	60
3.14 lb.	3.14	2.00	6.00	1.625	4.88	.312	.250	.656	6	2	69
4.0 lb.	4.00	1.33	5.33	.940	3.44	.300	.215	.618	9	2.25	55
4.27 lb.	4.27	1.41	4.00	1.000	2.88	.300	.250	.625	8.5	3	58
5.0 lb.	5.00	1.33	5.33	.813	3.38	.331	.250	.655	9	2.25	50
6.25 lb.	6.25	1.41	5.33	.813	3.38	.350	.312	.715	8.5	2.25	50
7.0 lb.	7.00	1.41	5.33	.813	3.38	.391	.318	.740	8.5	2.25	45
GRATING-STAINLESS STEEL
3.3 lb.	3.32	2.00	6.0	1.625	4.88	.312	.250	.656	6	2	69
4.5 lb.	4.25	1.41	4.0	1.000	2.88	.300	.250	.656	8.5	3	58
GRATING-ALUMINUM
2.0 lb.	2.0	1.33	5.33	.940	3.44	.387	.250	.730	9	2.25	48

A) 1 lb. = 0.454 kg; 1 in. = 25.4 mm. B) A variation in weight per square ft. of ±5% is permissible, based on the weight of any sheet or bundle. No combination of tolerances can be combined to yield weight per SF below -5 % tolerance range; the minimum weight per SF of - 5 % is absolute. C) A tolerance of ± 5 % is permitted in dimensions, center to center.

NOMINAL WEIGHTS AND DIMENSIONS*
STYLE	Nominal Weight for Lbs. Per Sq. Ft.	Design Size (Inches) _B		Opening Size (Inches) _C		Strand Size (Inches) _C		Overall Thickness (Inches)	No. of Designs Per Ft.		(%) Open Area

		SWD	LWD	SWO	LWO	Width	Thick- ness		SWD	LWD
GRATING-CARBON STEEL
2.0 lb.	2.00	1.33	5.33	1.000	3.60	.235	.135	.460	9	2.25	77
3.0 lb.	3.00	1.33	5.33	.940	3.44	.264	.183	.540	9	2.25	60
3.14 lb.	3.14	2.00	6.00	1.625	4.88	.312	.250	.656	6	2	69
4.0 lb.	4.00	1.33	5.33	.940	3.44	.300	.215	.618	9	2.25	55
4.27 lb.	4.27	1.41	4.00	1.000	2.88	.300	.250	.625	8.5	3	58
5.0 lb.	5.00	1.33	5.33	.813	3.38	.331	.250	.655	9	2.25	50
6.25 lb.	6.25	1.41	5.33	.813	3.38	.350	.312	.715	8.5	2.25	50
7.0 lb.	7.00	1.41	5.33	.813	3.38	.391	.318	.740	8.5	2.25	45
GRATING-STAINLESS STEEL
3.3 lb.	3.32	2.00	6.0	1.625	4.88	.312	.250	.656	6	2	69
4.5 lb.	4.25	1.41	4.0	1.000	2.88	.300	.250	.656	8.5	3	58
GRATING-ALUMINUM
2.0 lb.	2.0	1.33	5.33	.940	3.44	.387	.250	.730	9	2.25	48

A) 1 lb. = 0.454 kg; 1 in. = 25.4 mm. B) A variation in weight per square ft. of ±5% is permissible, based on the weight of any sheet or bundle. No combination of tolerances can be combined to yield weight per SF below -5 % tolerance range; the minimum weight per SF of - 5 % is absolute. C) A tolerance of ± 5 % is permitted in dimensions, center to center.

Concentrated & Uniform Load Deflection Tables/Fixed Span
			Carbon Steel - - - - - - - - - - - - - Style - Lbs. Per Sq. Ft.														Aluminum

			3		3.14		4		4.27		5		6.25		7		2

			Load	D	Load	D	Load	D	Load	D	Load	D	Load	D	Load	D	Load	D

	24" SPAN	U	275	.250	375	.250	350	.240	500	.245	600	.240	800	.220	800	.210
	24" SPAN	C	275	.250	375	.250	440	.250	400	.250	540	.245	800	.220	800	.220	250	.250

	36" SPAN	U	100	.220	150	.240	150	.245	165	.245	175	.240	300	.250	400	.250
	36" SPAN	C	165	.250	155	.250	220	.250	225	.240	310	.250	300	.240	350	.240	100	.250

	48" SPAN	U			50	.250	50	.250	60	.250	100	.250	115	.240	165	.240
	48" SPAN	C	75	.250	75	.250	100	.250	100	.250	140	.250	150	.240	175	.250	50	.250

U - Uniform Load in Lbs. Per Sq. Ft. C - Concentrated Load in Lbs. Per Sq. Ft. D - Deflection in inches

Concentrated & Uniform Load Deflection Tables/Fixed Span
			Carbon Steel - - - - - - - - - - - - - Style - Lbs. Per Sq. Ft.														Aluminum

			3		3.14		4		4.27		5		6.25		7		2

			Load	D	Load	D	Load	D	Load	D	Load	D	Load	D	Load	D	Load	D

	24" SPAN	U	275	.250	375	.250	350	.240	500	.245	600	.240	800	.220	800	.210
	24" SPAN	C	275	.250	375	.250	440	.250	400	.250	540	.245	800	.220	800	.220	250	.250

	36" SPAN	U	100	.220	150	.240	150	.245	165	.245	175	.240	300	.250	400	.250
	36" SPAN	C	165	.250	155	.250	220	.250	225	.240	310	.250	300	.240	350	.240	100	.250

	48" SPAN	U			50	.250	50	.250	60	.250	100	.250	115	.240	165	.240
	48" SPAN	C	75	.250	75	.250	100	.250	100	.250	140	.250	150	.240	175	.250	50	.250

U - Uniform Load in Lbs. Per Sq. Ft. C - Concentrated Load in Lbs. Per Sq. Ft. D - Deflection in inches

Selection Chart (Carbon Steel)*
CONCENTRATED LOAD (Lbs. Per Foot of Length of Catwalk or Platform)	CLEAR SPAN (Distance between supports, measured from the inside edge of one support to the inside edge of the next support.)

	23"	30"	35"	42"	47"	54"	60"

50 Lbs. Light or occasional pedestrian traffic	3.0 3.14	3.0 3.14	3.0 3.14	3.0 3.14	3.0 3.14	4.0 4.27	5.0 6.25

100 Lbs. Normal or frequent pedestrian traffic	3.0 3.14	3.0 3.14	3.0 3.14	4.0 4.27	5.0 6.25	7.0	7.0

150 Lbs. Heavy or constant pedestrian traffic	3.0 3.14	4.0 4.27	4.0 4.27	5.0 6.25	6.25	7.0

200 Lbs. Pedestrian traffic with light equipment	3.0 3.14	4.0 4.27	4.27 5.0	6.25	7.0	7.0

250 Lbs.	4.0 4.27	5.0	5.0 6.25	7.0	The concentrated load deflections for this chart do not exceed the 1/4" maximum deflection as stated by Federal Specification RR-G-661B and the generally accepted recommendation for normal pedestrian comfort.

300 Lbs.	4.0 4.27	5.0 6.25	6.25

350 Lbs.	4.0 4.27	6.25	7.0

* Sizes listed do not imply availability

Selection Chart (Carbon Steel)*
CONCENTRATED LOAD (Lbs. Per Foot of Length of Catwalk or Platform)	CLEAR SPAN (Distance between supports, measured from the inside edge of one support to the inside edge of the next support.)

	23"	30"	35"	42"	47"	54"	60"

50 Lbs. Light or occasional pedestrian traffic	3.0 3.14	3.0 3.14	3.0 3.14	3.0 3.14	3.0 3.14	4.0 4.27	5.0 6.25

100 Lbs. Normal or frequent pedestrian traffic	3.0 3.14	3.0 3.14	3.0 3.14	4.0 4.27	5.0 6.25	7.0	7.0

150 Lbs. Heavy or constant pedestrian traffic	3.0 3.14	4.0 4.27	4.0 4.27	5.0 6.25	6.25	7.0

200 Lbs. Pedestrian traffic with light equipment	3.0 3.14	4.0 4.27	4.27 5.0	6.25	7.0	7.0

250 Lbs.	4.0 4.27	5.0	5.0 6.25	7.0	The concentrated load deflections for this chart do not exceed the 1/4" maximum deflection as stated by Federal Specification RR-G-661B and the generally accepted recommendation for normal pedestrian comfort.

300 Lbs.	4.0 4.27	5.0 6.25	6.25

350 Lbs.	4.0 4.27	6.25	7.0

* Sizes listed do not imply availability

Installation Procedures

For maximum load, position Long Way of Design parallel to the clear span. LWD must be installed parallel to span. Butt or overlap one half of design. No increase in overall thickness.

Bolt or weld every 6 inches or every fourth design to rigid supports.

Install with straight edge up (top – straight edge, bottom – rounded edge). Bonds of adjoining should slope in same direction and align with adjoining pieces.