Terminology

Shearing Terminology

Grating/Projection Mesh

Carbon Steel – Grating
Style	Lbs. Per 100 Sq. Ft.		Standard Sheet Size (Feet)		Design Size (Inches)		Opening Size (Inches)		Size of Strands in Inches		Overall Thickness Inches	No. of Designs Per Foot		Percent Open Area
	Plain	Galv. Wt.	Width SWD	Length LWD	SWD	LWD	SWD	LWD	Width	Thickness		SWD	LWD
3 lb.	300	315	4 & 6	8 & 10	1.330	5.330	0.940	3.440	0.264	0.183	0.540	9.0	2.250	60
3.14 lb.	314	330	4 & 6	8 & 10	2.000	6.000	1.625	4.880	0.312	0.250	0.656	6.0	2.000	69
4 lb.	400	418	4 & 6	8 & 10	1.330	5.330	0.940	3.440	0.300	0.215	0.618	9.0	2.250	55
4.27 lb.	427	446	4 & 6	8 & 10	1.410	4.000	1.000	2.880	0.300	0.250	0.625	8.5	3.000	58
5 lb.	500	520	4 & 6	8 & 10	1.330	5.330	0.813	3.380	0.331	0.250	0.655	9.0	2.250	50
6.25 lb.	625	647	4 & 6	8 & 10	1.410	5.330	0.813	3.380	0.350	0.312	0.715	8.5	2.250	50
7 lb.	700	725	4 & 6	8 & 10	1.410	5.330	0.813	3.380	0.391	0.312	0.740	8.5	2.250	45

Stainless 304 – Grating
Style	Lbs. Per 100 Sq. Ft.		Standard Sheet Size (Feet)		Design Size (Inches)		Opening Size (Inches)		Strand Size (Inches)		Overall Thickness	No. of Designs Per Sq. Foot		% Open Area
	Plain	--	Width SWD	Length LWD	SWD	LWD	SWO	LWO	Width	Thickness Gauge		SWD	LWD
3.3 lbs.	330	--	4	10	2.00	6.0	1.625	4.88	.312	.250	.656	6	2	69
4.5 lbs.	450	--	4	10	1.41	4.0	1.000	2.88	.300	.250	.625	8.5	3	58

Aluminum 5052 H-32 – Grating

Style

Lbs. Per 100 Sq. Ft.

Standard Sheet Size (Feet)

Design Size (Inches)

Opening Size (Inches)

Strand Size (Inches)

Overall Thickness

No. of Designs Per Sq. Foot

% Open Area

Plain

--

Width SWD

Length LWD

SWD

LWD

SWO

LWO

Width

Thickness

SWD

LWD

2.0 lbs.

200

--

4 5

8 10 & 12

1.33

5.33

.940

3.44

.387

.250

.730

9

2.25

48

All weights, gauges and dimensions are approximate.

Projection Mesh – Carbon Steel
Style	Lbs. Per 100 Sq. Ft.		Stock Sheet Size		Design Size (Inches)		Opening Size (Inches)		Strand Size (Inches)		Overall Thick- ness	Designs Per Foot		% Open Area
	Plain	Galv.	SWD	LWD	SWD	LWD	SWO	LWO	Width	Thk.		SWD	LWD
1.87 lb.	187	196	*	*	1.13	5.00	.880	3.19	.187	.135	.438	10.6	2.4	67
3.0 lb.	300	315	*	*	1.13	5.00	.750	3.12	.250	.160	.625	10.6	2.4	56

* Special order only.            LWD maximum length 120"

Projection Mesh – Aluminum
Style	Lbs. Per 100 Sq. Ft.	Stock Sheet Size		Design Size (Inches)		Opening Size (Inches)		Strand Size (Inches)		Overall Thick- ness	Designs Per Foot		% Open Area
	Plain	SWD	LWD	SWD	LWD	SWO	LWO	Width	Thk.		SWD	LWD
XL-100-A	100	*	*	1.13	5.00	.855	3.12	.250	.160	.550	10.6	2.4	54
XL-125-A	125	*	*	1.13	5.00	.825	3.06	.270	.190	.562	10.6	2.4	50
XL-150-A	150	*	*	1.30	5.00	.760	3.12	.270	.250	.650	10.6	2.4	60
XL-190-A	190	*	*	1.35	5.00	.770	3.12	.360	.250	.810	8.5	2.4	46

* Special order only.            LWD maximum length 120"

Projection Mesh Load Tables – Carbon Steel
Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
1.87			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	12	.01 .01	.02 .02	.03 .03	.04 .04	.05 .05	.06 .07	.09	.11
	U C	18	.04 .04	.08 .09	.12 .14	.16 .20	.20 .24	.24 .29	.30
	U C	24	.10 .12	.22 .25	.35 .37
	U C	30	.22 .29	.40

Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
3.0			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	18	.01 .02	.03 .03	.05 .05	.07 .07	.09 .10	.12 .13	.16 .16	.19 .20
	U C	24	.04 .05	.09 .10	.14 .16	.20 .25	.27	.34
	U C	30	.08 .12	.17 .25	.30
	U C	36	.16	.32

Load Tables – Aluminum
Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
XL-100-A			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	12	.008 .041	.019 .064	.030 .085	.043 .105	.054 .126	.066 .141
	U C	18	.011 .128	.025 .166	.040 .227	.061 .273	.089 .306	.180 .365	.135 .406
	U C	24	.025 .180	.075 .342	.140 .495	.213 .694
	U C	30	.037 .295	.210 .566	.460 .787

Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
XL-125-A			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	12	.005 .050	.007 .075	.009 .095	.012 .108	.015 .124	.018 .134
	U C	18	.009 .052	.022 .093	.038 .123	.055 .154	.081 .186	.103 .211	.124 .246
	U C	24	.020 .124	.071 .249	.131 .345	.209 .474	.315 .592
	U C	31	.020 .220	.045 .416	.080 .615	.200 .715

Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
XL-150-A			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	18	.019 .080	.041 .127	.057 .167	.081 .209	.090 .246	.102 .282	.114 .282	.302
	U C	24	.025 .236	.060 .332	.092 .435	.140 .503	.191 .593	.290 .681
	U C	30	.028 .255	.071 .359	.104 .511	.182 .654	.210 .790	.334 .939
	U C	36	.030 .350	.190 .626	.400 .946

Style	Load Condition	Span (inches)	Load in Pounds - Deflection in Inches
XL-190-A			50 lbs.	100 lbs.	150 lbs.	200 lbs.	250 lbs.	300 lbs.	350 lbs.	400 lbs.
	U C	18	.011 .046	.028 .081	.045 .112	.062 .133	.077 .160	.089 .180	.098 .206
	U C	24	.015 .052	.049 .117	.084 .167	.121 .217	.148 .267	.162 .315	.185 .380
	U C	30	.019 .096	.055 .181	.098 .260	.161 .342	.189 .429	.210 .505
	U C	36	.022 .240	.133 .392	.260 .562	.390 .712	.520 .885

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Fixed Span

CARBON STEEL
STYLE (Lb. Per Sq. Ft.)	SPAN
		24"	36"	48"
3	U      D	275      .250	100      .220
	C      D	275      .250	165      .250	75      .250
3.14	U      D	375      .250	150      .240	50      .250
	C      D	375      .250	155      .250	75      .250
4	U      D	350      .240	150      .245	50      .250
	C      D	440      .250	220      .250	100      .250
4.27	U      D	500      .245	165      .245	60      .250
	C      D	400      .250	225      .240	100      .250
5	U      D	600      .240	175      .240	100      .250
	C      D	540      .245	310      .250	140      .250
6.25	U      D	800      .220	300      .250	115      .240
	C      D	800      .220	300      .240	150      .240
7	U      D	800      .210	400      .250	165      .240
	C      D	800      .220	350      .240	175      .250

ALUMINUM
2.0	C      D	250      .250	100      .250	50      .250

STAINLESS STEEL
3.30	C      D	––      ––	150      .197	50      .135
4.50	C      D	300      .217	150      .192	100      .212

Free Span

CARBON STEEL
STYLE (Lb. Per Sq. Ft.)	SPAN
		24"	36"	48"
3	C      D	100      .177	50      .402	50      .515
3.14	C      D	200      .255	100      .583	50      .275
4	C      D	200      .237	100      .491	50      .615
4.27	C      D	200      .223	100      .217	50      .330
5	C      D	350      .240	100      .408	50      .372
6.25	C      D	400      .249	100      .247	50      .270
7	C      D	400      .245	100      .260	75      .250

ALUMINUM
2	C      D	150      .231	50      .257	––      ––

STAINLESS STEEL
3.30	C      D	150      .248	50      .300	––      ––
4.50	C      D	150      .210	50      .244	50      .600

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Catwalk Grating Selection Chart
CONCENTRATED LOAD (Lb. 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	3.00 3.14	3.00 3.14	3.00 3.14	3.00 3.14	3.00 3.14	4.00 4.27	5.00 6.25
100 lbs. Normal or Frequent pedestrian traffic	3.00 3.14	3.00 3.14	3.00 3.14	4.00 4.27	5.00 6.25	7.00	7.00
150 lbs. Heavy or constant pedestrian traffic	3.00 3.14	4.00 4.27	4.00 4.27	5.00 6.25	6.25	7.00
200 lbs. Pedestrian traffic with Light equipment	3.00 3.14	4.00 4.27	4.27 5.00	6.25	7.00	7.00
250 lbs.	4.00 4.27	5.00	5.00 6.25	7.00
300 lbs.	4.00 4.27	5.00 6.25	6.25	7.00
350 lbs.	4.00 4.27	6.25	7.00

The concentrated load deflections for the above selection chart do not exceed the 1/4" maximum deflection as stated by the federal Specification RR-G-661B and the generally accepted recommendations for normal pedestrian comfort.